Textile fabric printing and dyeing rinsing sewage treatment device

Abstract

The invention discloses a textile fabric printing and dyeing rinsing sewage treatment device, and particularly relates to a water pollution treatment technology, the textile fabric printing and dyeing rinsing sewage treatment device comprises a treatment pond, the treatment pond is internally provided with a down-flushing aeration system, the down-flushing aeration system comprises an aeration pipe module which is distributed along the vertical direction, and an air outlet of the aeration pipe module faces the bottom of the treatment pond; and the upper flushing aeration system comprises a first aeration pipe which is distributed along the vertical direction and has an air outlet facing the opening of the treatment tank, and further comprises a back flushing filtering module which is welded in the treatment tank through a bracket and is communicated with an air outlet port of the first aeration pipe. According to the invention, the upper flushing aeration system and the lower flushing aeration system are utilized to enable the liquid in the treatment tank to form circulation from top to bottom, so that the liquid flow in the treatment tank is optimized, and the contact with the RO membrane group is increased through the optimized flow of the liquid, so that the treatment efficiency is improved, and the content of suspended particles in unit cube after filtration is greatly reduced.

Description

Technical Field

[0001] The invention relates to a water pollution treatment technology, in particular to a textile fabric printing, dyeing and rinsing wastewater treatment device. Background Art

[0002] Printing and dyeing wastewater contains complex components such as dyes, auxiliaries, bleaching agents, acids, alkalis, and heavy metals. Its COD (Chemical Oxygen Demand), BOD (Biological Oxygen Demand), and color are extremely high. Direct discharge can lead to oxygen depletion in water bodies and the death of aquatic life. For example, dyeing one ton of textiles requires 100-200 tons of water. Dye residues in the wastewater can make the water's color difficult to degrade naturally over the long term.

[0003] Currently, a multi-stage process is commonly used to treat printing and dyeing wastewater. This process includes pretreatment (filtration to remove visible suspended matter, such as fabric fibers), coagulation and sedimentation (neutralization with a coagulant to remove filterable suspended matter), biological treatment, and advanced treatment. Advanced treatment involves using RO membranes to remove salt and trace contaminants, enabling wastewater reuse. For example, Chinese patent publication number CN106186554A discloses a pretreatment method for the residual RO concentrate after dual-membrane desalination of PTA wastewater for reuse.

[0004] In the prior art including the above-mentioned patent, the patent provides a conventional layout of RO membranes for sewage treatment. In short, it is to encourage the liquid to rise through aeration and other means, so that the suspended particles in the liquid are adsorbed and processed by the RO membrane when passing through the RO membrane. However, these suspended particles will move arbitrarily during the upwelling of the liquid, so this process needs to be run for a predetermined time to ensure that the suspended particles in the liquid can be maximized by the RO membrane under sufficient treatment time. In this way, the suspended particles in each cubic meter of liquid are within the required range, so how to further reduce the content of suspended particles in each cubic meter is expected to be well solved. Summary of the Invention

[0005] The purpose of the present invention is to provide a textile fabric printing, dyeing and rinsing wastewater treatment device to solve the above problems.

[0006] In order to achieve the above object, the present invention provides the following technical solutions: A textile fabric printing, dyeing and rinsing wastewater treatment device comprises a treatment tank, wherein the treatment tank is provided with: A downwash aeration system, comprising an aeration pipe module distributed in a vertical direction with an air outlet facing the bottom of the treatment tank; An upwash aeration system comprising a first aeration pipe distributed in a vertical direction and with an air outlet facing the treatment tank port, and a backwash filter module welded to the treatment tank via a bracket and connected to the air outlet port of the first aeration pipe; The backwash filter module is provided with an RO membrane group; The liquid outlet port of the backwash filter module is fixedly installed with a drainage guide plate with a conical cross-section and completely submerged in the sewage; The guide surface of the drainage guide plate is an inclined surface, and is inclined upward, and its two ends are divided into a high end and a low end according to the vertical height; The aeration tube module comprises a guide plate with a conical cross section and completely submerged in sewage. A liquid inlet is provided on the inclined surface of the guide plate, and the liquid inlet is flush with the high end.

[0007] Preferably, there are multiple upwash aeration systems, which are distributed in the treatment tank in a matrix, and the downwash aeration systems are equidistantly distributed between every two upwash aeration systems.

[0008] Preferably, the upwash aeration system further comprises a drainage cone fixedly connected to the water inlet of the backwash filter module, the bottom of which is a conical recessed portion, the top of which is provided with an inlet for the outlet end of the first aeration pipe to extend therein, and an annular guide gap is formed between the two. The bottom of the drainage cone is kept at a predetermined height from the bottom of the treatment pool.

[0009] Preferably, spiral guide groove tubes distributed in a circumferential array are fixedly installed on the side surface of the conical recessed portion, and the ports of the spiral guide groove tubes are divided into a liquid inlet end and a liquid outlet end; In the vertical direction, the liquid inlet end is located below the liquid outlet end, and the liquid outlet end is lower than the gas outlet end of the first aeration tube.

[0010] Preferably, a flow equalizing disk is fixedly installed in the drainage cone and is distributed close to the backwash filter module.

[0011] Preferably, the air outlet of the aeration tube module is higher than the air outlet end of the first aeration tube.

[0012] Preferably, the backwash filtration module includes a cylinder, and the RO membrane group includes floating island supports and hanging fixtures fixedly mounted inside the cylinder and symmetrically distributed, and the hanging fixtures are adjacent to the drainage guide plate, wherein: The floating island support member includes a central column, and the side walls of the central column are equipped with a hanging elastic rod group distributed in sequence along the vertical direction, and the hanging elastic rod group includes a plurality of U-shaped elastic rods distributed in a circumferential array; RO membrane strips are fixedly arranged between the U-shaped elastic rods on each layer of the hanging elastic rod group and the hanging fixing members.

[0013] Preferably, the multiple RO membrane strips on each layer of the hanging elastic rod group are arranged in a circle to form a hanging membrane cylinder, and the circumference of the hanging membrane cylinder formed by the multiple hanging elastic rod groups decreases from bottom to top along the vertical direction.

[0014] Preferably, the RO membrane strip is divided into a hammer hanging portion and a U-shaped portion according to its structure, and the hammer hanging portion is connected to the hanging fixture, while one end of the U-shaped portion is connected to the U-shaped elastic rod.

[0015] Preferably, one U-shaped elastic rod on the hanging elastic rod group corresponds to the gap between two U-shaped elastic rods on the upper hanging elastic rod group. In the above-mentioned technical solution, the present invention provides a textile fabric printing and dyeing rinsing wastewater treatment device with the following beneficial effects: An upward aeration system and a downward aeration system are utilized to create a top-down circulation of the liquid within the treatment tank. Air is continuously supplied to the aeration tube module and the first aeration tube via an external air supply device. During this process, liquid near the sewage surface is drawn into the liquid inlet of the guide plate and then flows downward along the aeration tube module to the bottom of the treatment tank. During this upward aeration process in the first aeration tube, the liquid returned to the bottom of the treatment tank is again drawn upward into the backwash filter module. As the liquid passes through the RO membrane module, suspended particles in the liquid are absorbed and then directed upward again along the inclined surface of the drainage guide plate for discharge. This forms an aerated liquid circulation system within the treatment tank. This top-down circulation liquid agitation system effectively ensures contact between the RO membrane module and the liquid, significantly reducing the content of suspended particles per cubic meter after filtration and shortening the execution time of deep treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments described in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0017] Figure 1 An overall schematic diagram provided for an embodiment of the present invention; Figure 2 A schematic structural diagram of a downwash aeration system and an upwash aeration system provided in an embodiment of the present invention; Figure 3 A schematic structural diagram of a cross-section of a diagram provided in an embodiment of the present invention; Figure 4 A schematic diagram of a cross-sectional structure of a guide plate provided in an embodiment of the present invention; Figure 5 A schematic structural diagram of a backwash filter module provided in an embodiment of the present invention; Figure 6 A schematic structural diagram of a spiral guide groove pipe, a conical recessed portion, and a first aeration pipe provided in an embodiment of the present invention; Figure 7 The embodiment of the present invention provides Figure 5 Schematic diagram of the cross-sectional structure; Figure 8 This is a structural diagram of the RO membrane strips, floating island supports and hanging fixtures provided in an embodiment of the present invention.

[0018] Description of reference numerals: 1. Treatment tank; 2. Aeration pipe module; 21. Guide plate; 211. Liquid inlet; 22. First delivery pipe; 23. Center pipe; 3. First aeration pipe; 31. Second delivery pipe; 4. Backwash filter module; 41. Drainage guide plate; 411. Inclined surface; 42. Drainage cone; 421. Conical recess; 422. Annular guide gap; 423. Spiral guide groove tube; 424. Flow equalizing plate; 43. Cylinder; 44. Rectangular guide tube; 5. RO membrane group; 51. Floating island support; 511. Center column; 512. U-shaped elastic rod; 513. Circular ring; 514. Connecting column; 52. Hanging fixture; 521. Ring leaf; 53. RO membrane strip; 531. Hammer hanging part; 532. U-shaped part. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0020] like Figure 1-8 As shown, a textile fabric printing and dyeing rinsing wastewater treatment device includes a treatment tank 1, in which the following are arranged: A downwash aeration system, comprising an aeration pipe module 2 distributed in a vertical direction with an air outlet toward the bottom of the treatment tank 1; The upwash aeration system includes a first aeration pipe 3 distributed in the vertical direction and with the gas outlet facing the pool mouth of the treatment tank 1, and also includes a backwash filter module 4 welded to the treatment tank 1 through a bracket and connected to the gas outlet port of the first aeration pipe 3; The backwash filter module 4 is provided with an RO membrane group 5; The liquid outlet port of the backwash filter module 4 is fixedly mounted with a drainage guide plate 41 having a conical cross-section and completely submerged in the sewage; The guide surface of the drainage guide plate 41 is an inclined surface 411, and is inclined upward, and its two ends are divided into a high end and a low end according to the vertical height; The aeration tube module 2 includes a guide plate 21 with a conical cross-section and completely submerged in the sewage. A liquid inlet 211 is provided on the inclined surface of the guide plate 21 , and the liquid inlet 211 is flush with the high end.

[0021] Specifically, each longitudinal row of multiple aeration tube modules 2 is fixedly connected to a first delivery pipe 22. Similarly, each longitudinal row of multiple first aeration tubes 3 is fixedly connected to a second delivery pipe 31. Both the first delivery pipe 22 and the second delivery pipe 31 are then fixedly connected to the output of an external air supply unit, such as a high-power blower, thereby providing stable gas output for the downflow aeration system and the upflow aeration system.

[0022] Further, combined Figure 3 It can be seen that the tops of the drainage guide plate 41 and the guide plate 21 are in the same plane and are both lower than the sewage level in the treatment pool. The vertical distance between the liquid level and the tops of the drainage guide plate 41 and the guide plate 21 is maintained between 15cm and 25cm.

[0023] Secondly, the liquid discharged from the backwash filter module 4 here will impact the inclined surface 411 of the drainage guide plate 41, and then be guided along the inclined surface 411, flow obliquely upward, and then be sucked by the suction force of the liquid inlet 211, thereby entering the aeration tube module 2 and flowing downward.

[0024] Combine Figure 4 It can be seen that a central tube 23 is installed on the inner wall of the aeration tube module 2 in the embodiment, and a predetermined gap is maintained between the central tube 23 and the aeration tube module 2. In addition, the central tube 23 is located at the liquid inlet 211. Its purpose is to ensure that the gas passes through the aeration tube module 2 and is not discharged from the liquid inlet 211. The flow of gas drives the flow of water to achieve the purpose of sucking liquid at the liquid inlet 211.

[0025] Furthermore, combined Figure 1-3 As can be seen, there are multiple upwash aeration systems, distributed in a matrix across treatment tank 1, while downwash aeration systems are evenly spaced between each upwash aeration system. Therefore, the spacing between upwash and downwash aeration systems should be adjusted based on actual user needs. In actual measurements, the spacing between upwash and downwash aeration systems should not exceed 0.8m-1.2m.

[0026] In the above-described technology, an upward aeration system and a downward aeration system are utilized to create a top-down circulation of the liquid within the treatment tank 1. Air is continuously supplied to the aeration tube module 2 and the first aeration tube 3 via an external air supply device. During this process, liquid near the sewage surface is drawn into the liquid inlet 211 of the guide plate 21 and then directly downward along the aeration tube module 2 to the bottom of the treatment tank 1. During this upward aeration process of the first aeration tube 3, the liquid returned to the bottom of the treatment tank 1 is again drawn upward into the backwash filter module 4. As the liquid passes through the RO membrane module 5, suspended particles in the liquid are absorbed and directed out through the inclined surface 411 of the drainage guide plate 41, thereby forming an aerated liquid circulation system within the treatment tank 1. This top-down liquid agitation system effectively ensures contact between the RO membrane module 5 and the liquid, significantly reducing the suspended particle content per cubic meter after filtration and shortening the execution time of deep treatment.

[0027] As an embodiment further provided by the present invention, the upwash aeration system also includes a drainage cone 42 fixedly connected to the water inlet of the backwash filter module 4, the bottom of which is a conical recessed portion 421, and the top of the conical recessed portion 421 is provided with an exploration port for the air outlet end of the first aeration pipe 3 to extend into, and an annular guide gap 422 is formed between the two, and the bottom of the drainage cone 42 is maintained at a predetermined height from the bottom of the treatment tank 1.

[0028] Specifically, the above-mentioned predetermined height is actually between 6cm and 70cm in vertical height. The second delivery pipe 31 is installed at the bottom of the treatment tank 1 and is fixed by a pipe clamp. When the gas passes through the first aeration pipe 3 and is discharged, the gas rises along the backwash filter module 4, and then the discharged liquid will impact the inclined surface 411 of the drainage guide plate 41, and then be guided along the inclined surface 411, flowing obliquely upward, and then be sucked by the suction force of the liquid inlet 211, thereby entering the aeration pipe module 2 and flowing downward. In the above process, because the first aeration pipe 3 outputs gas upward, it will encourage the liquid inside the backwash filter module 4 to rise. The liquid inside the treatment tank 1 will rise and enter along the drainage cone 42. Because the drainage cone 42 is conical, its drainage coverage is relatively large. After exiting the annular guide gap 422, the flow channel cross-section is reduced and the flow rate is accelerated.

[0029] As another embodiment further provided by the present invention, Figure 6 As shown, spiral guide groove tubes 423 distributed in a circumferential array are fixedly installed on the side of the conical recessed portion 421, and the ports of the spiral guide groove tubes 423 are divided into a liquid inlet end and a liquid outlet end.

[0030] In the vertical direction, the liquid inlet end of the spiral guide groove tube 423 is located below the liquid outlet end of the spiral guide groove tube 423 , and the liquid outlet end of the spiral guide groove tube 423 is lower than the gas outlet end of the first aeration tube 3 .

[0031] Specifically, as gas is transported from the first aeration pipe 3, it creates suction through the spiral guide groove 423, drawing liquid into the interior of the drainage cone 42. This spiral guide groove 423 creates a vortex within the drainage cone 42, increasing the vortex's ability to transport and accumulate suspended particles in the liquid. The spiral guide groove 423 has a pitch of 8-10 cm and a spiral length of 0.5 mm.

[0032] As another embodiment further provided by the present invention, Figure 7 As shown, a flow equalizing disk 424 is fixedly installed in the drainage cone 42 and is distributed close to the backwash filter module 4.

[0033] Specifically, the flow balancing disk 424 is a circular disk structure with a plurality of through holes distributed in a matrix, the purpose of which is to slow down the flow rate through the flow balancing disk 424 and prevent the vortex liquid from flowing too fast and directly impacting the RO membrane group 5.

[0034] Secondly, the vortex rotation speed of the liquid entering the RO membrane group 53 after passing through the flow equalizing disk 424 is cut off or reduced, so as to prevent the RO membrane strips 53 in the RO membrane group 5 from being torqued together along the vortex direction under the action of the vortex force, thereby reducing the contact area between the RO membrane group 5 and the liquid, that is, reducing the adsorption capacity of the RO membrane strips 53.

[0035] As another embodiment further provided by the present invention, Figure 3 As shown, the air outlet of the aeration tube module 2 is higher than the air outlet end of the first aeration tube 3 .

[0036] Specifically, because the outlet of aeration tube module 2 is higher than the outlet end of first aeration tube 3, that is, the spiral guide groove tube 423 is lower than the outlet of aeration tube module 2, when first aeration tube 3 is in operation, the gas and liquid discharged from the outlet of aeration tube module 2 are also sucked away by the spiral guide groove tube 423 of the adjacent upwash aeration system. The purpose of this design is to draw the liquid near the surface of the sewage drawn by aeration tube module 2 into the interior of backwash filter module 4 through spiral guide groove tube 423, and then filter it through RO membrane module 5, thereby optimizing the RO membrane module 5's sewage treatment efficiency.

[0037] As another embodiment further provided by the present invention, Figure 7As shown, the backwash filtration module 4 includes a cylinder 43, and the RO membrane group 5 includes a floating island support 51 and a hanging fixture 52 fixedly installed inside the cylinder 43 and symmetrically distributed, and the hanging fixture 52 is distributed adjacent to the drainage guide plate 41, wherein: The floating island support 51 includes a central column 511 , and a group of hanging elastic rods distributed in sequence along the vertical direction is installed on the side wall of the central column 511 . The hanging elastic rod group includes a plurality of U-shaped elastic rods 512 distributed in a circular array. RO membrane strips 53 are fixedly arranged between the U-shaped elastic rods 512 and the hanging fixing members 52 on each layer of the hanging elastic rod group.

[0038] Specifically, one end of the cylinder 43 is plugged into and connected to the liquid outlet of the drainage cone 42. The other end is then directly secured to the drainage guide plate 41. Since the RO membrane module 5 is located inside the cylinder 43, the flow equalizer 424 is used to reduce the vortex torque of the liquid entering the cylinder 43.

[0039] Furthermore, the floating island support member 51 in the above embodiment is structurally divided into a circular ring 513, connecting posts 514, and a central post 511. The outer wall of the circular ring 513 is threaded onto the inner wall of the cylindrical body 43, while the central post 511 is then connected to the inner wall of the circular ring 513 via circumferentially distributed connecting posts 514, securing the central post 511 to the inner wall of the circular ring 513. The floating island support member 51 is an injection-molded part. Therefore, during operation, liquid can enter the RO membrane strips 53 through the gaps between adjacent connecting posts 514.

[0040] The hanging fixture 52 is a plastic mesh plate, which is also installed on the inner wall of the cylinder 43 by means of threaded connection.

[0041] Furthermore, the above-mentioned hanging elastic rod groups are distributed on the central column 511 from top to bottom, and the number of the hanging elastic rod groups is not less than three. The three hanging elastic rod groups are defined as a, b, and c from top to bottom.

[0042] The hanging fixture 52 is integrally formed with a plurality of ring pages 521 with decreasing circumferential radius on the side facing the floating island support 51. From the outside to the inside, we define them as A, B, and C.

[0043] The RO membrane strip 53 on a is connected to A, the RO membrane strip 53 on b is connected to B, and the RO membrane strip 53 on c is connected to C. That is, the multiple RO membrane strips 53 on each layer of hanging elastic rod groups are arranged in a circle to form a hanging membrane cylinder, and the circumference of the hanging membrane cylinder formed by the multiple hanging elastic rod groups decreases from bottom to top along the vertical direction.

[0044] It should be noted that a U-shaped elastic rod 512 on the above-mentioned hanging elastic rod group corresponds to the gap between two U-shaped elastic rods 512 on the upper hanging elastic rod group. Therefore, when liquid passes through the RO membrane group 5, it passes through the spaced RO membrane strips 53 in sequence, thereby increasing the contact area of the passing liquid and improving treatment efficiency.

[0045] The RO membrane strip 53 is formed by spirally interlacing multiple strands of RO membranes. The spacing between the multiple strands of RO membranes is relatively large, and the entire strip is sparse, which facilitates the passage of liquid through the multiple strands of RO membranes.

[0046] Furthermore, the above combination Figure 8 As shown, the installation process of the RO membrane strips 53 fixed on the floating island support 51 and the hanging fixture 52 is as follows: One end of the RO membrane strip 53 is fixed to the ring 521 via a steel wire or elastic flange, and the other end is similarly fixed to the end of the U-shaped elastic rod 512, forming a hammer hanging portion 531. This is connected to the ring 521. After the hammer hanging portion 531 is lowered to a predetermined length, it is bent in the opposite direction and fixed to the U-shaped elastic rod 512, forming a U-shaped portion 532. The purpose of this design is to further increase the contact area between the RO membrane strip 53 and the sewage, thereby improving the efficiency of sewage treatment.

[0047] As another embodiment further provided by the present invention, Figure 3 As shown, the backwash filter module 4 also includes a rectangular guide tube 44, where the cylinder 43 is welded to the inner wall of the rectangular guide tube 44 through a bracket, so that the cylinder 43 is located in the center of the rectangular guide tube 44, and combined with Figure 3 As can be seen, one end of the rectangular guide tube 44 is close to the sewage surface, while the other end is located at the vertical center of the treatment tank 1. Therefore, when liquid is discharged through the cylinder 43, it will impact the inclined surface 411 of the drainage guide plate 41, then be guided along the inclined surface 411, flow diagonally upward, and then be sucked by the suction force of the liquid inlet 211, thereby entering the aeration tube module 2 and flowing downward.

[0048] When the water flow is guided by the inclined surface 411, because the inclined surface 411 is adjacent to a port of the rectangular guide tube 44 close to the sewage liquid surface, a suction effect is formed, and the liquid in the middle part of the treatment tank 1 is sucked into between the cylinder 43 and the rectangular guide tube 44, and then mixed into the above-mentioned liquid, and finally guided out through the inclined surface 411.

[0049] The above design takes into account how to incorporate the sewage in the middle layer of treatment tank 1 into the internal circulation system. Thus, a small circulation system in the middle layer is added to the large circulation system formed by the downwash aeration system and the upwash aeration system, thereby driving the sewage in the middle layer to circulate into the large circulation system, thereby improving the efficiency of sewage treatment.

[0050] It should be noted that the backwash filter module 4 provided above is directly fixed to a metal bracket pre-implanted in the treatment tank 1 by bolts, so as to facilitate subsequent disassembly and lifting for cleaning or replacement.

[0051] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims.

Claims

1. A textile fabric printing and dyeing rinsing wastewater treatment device, comprising a treatment tank (1), characterized in that: The treatment pool (1) is provided with: A downwash aeration system comprising an aeration pipe module (2) distributed in a vertical direction with an air outlet facing the bottom of the treatment tank (1); An upwash aeration system comprising a first aeration pipe (3) distributed in a vertical direction and with an air outlet facing the pool opening of the treatment pool (1), and a backwash filter module (4) welded to the treatment pool (1) via a bracket and connected to the air outlet port of the first aeration pipe (3); The backwash filtration module (4) is provided with an RO membrane group (5); The liquid outlet port of the backwash filter module (4) is fixedly mounted with a drainage guide plate (41) having a conical cross-section and completely submerged in the sewage; The guide surface of the drainage guide plate (41) is an inclined surface (411) and is inclined upward, and its two ends are divided into a high end and a low end according to the vertical height; The aeration tube module (2) comprises a guide plate (21) having a conical cross-section and completely submerged in sewage, and a liquid inlet (211) is provided on the inclined surface of the guide plate (21), and the liquid inlet (211) is flush with the high end.

2. A textile fabric printing and dyeing rinsing wastewater treatment device according to claim 1, characterized in that: There are multiple upwash aeration systems, which are distributed in the treatment tank (1) in a matrix, and the downwash aeration systems are equally spaced between every two upwash aeration systems.

3. The textile fabric printing and dyeing rinsing wastewater treatment device according to claim 1, characterized in that: The upwash aeration system further comprises a drainage cone (42) fixedly connected to the water inlet of the backwash filter module (4), the bottom of which is a conical recess (421), the top of which is provided with an inlet for the outlet end of the first aeration pipe (3) to extend therein, and an annular guide gap (422) is formed between the two. The bottom of the drainage cone (42) is kept at a predetermined height from the bottom of the treatment pool (1).

4. A textile fabric printing and dyeing rinsing wastewater treatment device according to claim 3, characterized in that: The side surface of the conical recess (421) is fixedly mounted with spiral guide groove tubes (423) distributed in a circumferential array, and the ports of the spiral guide groove tubes (423) are divided into a liquid inlet end and a liquid outlet end; In addition, in the vertical direction, the liquid inlet end is located below the liquid outlet end, and the liquid outlet end is lower than the gas outlet end of the first aeration tube (3).

5. The textile fabric printing and dyeing rinsing wastewater treatment device according to claim 3, characterized in that: A flow equalizing disk (424) is fixedly installed in the drainage cone (42) and is distributed close to the backwash filter module (4).

6. The textile fabric printing, dyeing and rinsing wastewater treatment device according to claim 1, characterized in that: The air outlet of the aeration tube module (2) is higher than the air outlet end of the first aeration tube (3).

7. The textile fabric printing, dyeing and rinsing wastewater treatment device according to claim 1, characterized in that: The backwash filter module (4) includes a cylinder (43), and the RO membrane group (5) includes a floating island support (51) and a hanging fixture (52) fixedly mounted inside the cylinder (43) and symmetrically distributed, and the hanging fixture (52) is distributed adjacent to the drainage guide plate (41), wherein: The floating island support member (51) comprises a central column (511), and a hanging elastic rod group distributed in sequence along a vertical direction is installed on the side wall of the central column (511), and the hanging elastic rod group comprises a plurality of U-shaped elastic rods (512) distributed in a circumferential array; An RO membrane strip (53) is fixedly arranged between the U-shaped elastic rod (512) on each layer of the hanging elastic rod group and the hanging fixing member (52).

8. A textile fabric printing and dyeing rinsing wastewater treatment device according to claim 7, characterized in that: The multiple RO membrane strips (53) on each layer of the hanging elastic rod group are arranged in a circle to form a hanging membrane cylinder, and the circumference of the hanging membrane cylinder formed by the multiple hanging elastic rod groups decreases from bottom to top along the vertical direction.

9. A textile fabric printing and dyeing rinsing wastewater treatment device according to claim 8, characterized in that: The RO membrane strip (53) is divided into a hammer hanging portion (531) and a U-shaped portion (532) according to its structure, and the hammer hanging portion (531) is connected to the hanging fixing member (52), while one end of the U-shaped portion (532) is connected to the U-shaped elastic rod (512).

10. The textile fabric printing, dyeing and rinsing wastewater treatment device according to claim 7, characterized in that: A U-shaped elastic rod (512) on the hanging elastic rod group corresponds to the gap between two U-shaped elastic rods (512) on the hanging elastic rod group of the upper layer.

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