Aramid fiber dyeing wastewater organic carrier recovery system

Abstract

The application discloses an organic carrier recovery system for aramid dyeing wastewater, which comprises a wastewater pool, two membrane separation assemblies arranged on one side of the wastewater pool, and two pump bodies one respectively connected to the wastewater pool through two pipelines one on the same side. The aramid dyeing wastewater has a high salt concentration, which greatly influences separation, so water needs to be added to the wastewater pool through the dilution pipeline to complete multiple dilution of the aramid dyeing wastewater, then the diluted wastewater is separated through the membrane technology, and then the separated aramid dyeing water is discharged into the extraction assembly through the drain pipe, the extension pipe connected to the drain pipe, the pump body two and the pipeline three, the organic carrier in the membrane separation permeate liquid is extracted through the extraction assembly and the organic solvent added in the extraction assembly, and finally the material needing to be separated and purified again is discharged into the column separation assembly through the transparent outlet pipe, the electric three-way valve and the pipeline four, and the organic carrier in the purified material is separated and purified again through the column separation.

Description

Technical Field

[0001] This invention relates to the field of aramid dyeing, and more specifically, to an organic carrier recovery system for aramid dyeing wastewater. Background Technology

[0002] Aramid dyeing wastewater mainly comes from aramid dyeing, wool dyeing and finishing, and silk factories that process cotton, linen, chemical fibers and their blended products. In the process of dyeing aramid in textiles, a certain aniline organic carrier with a density slightly greater than water is used to enhance the dyeing effect.

[0003] After the aramid dyeing process is completed, this type of organic carrier is discharged with the aramid dyeing wastewater. The daily discharge of this aramid dyeing wastewater is nearly 50 tons, and the concentration of organic carrier in the wastewater is about 3% to 4%. This aramid dyeing wastewater has high organic matter content, high salt concentration, deep color, and poor biodegradability. Tests have shown that the COD in the wastewater is as high as 5000 mg / L, and the salt content is as high as 20 to 30 g / L. Currently, the main treatment of this aramid dyeing wastewater is to dilute it with water to achieve compliance with discharge standards.

[0004] Because aramid dyeing wastewater contains a large amount of organic dyes and auxiliary dyeing salts, it is characterized by high salt content, high color intensity, and high COD, making it difficult to treat. Furthermore, the aramid dyeing process introduces a large amount of organic carriers, which possess unique physicochemical properties such as low molecular weight, similar charge to the dyes, and high boiling points, further exacerbating the difficulty of wastewater treatment. Therefore, if the organic carriers in aramid dyeing wastewater can be effectively recovered, it will not only reduce the difficulty of wastewater treatment but also, based on the economic value and large usage of organic carriers, effectively reduce the operating costs of the aramid dyeing process. Therefore, this invention proposes a physical method for separating and recovering organic carriers from aramid dyeing wastewater, ensuring that the physicochemical properties of the organic carriers remain unchanged. Summary of the Invention

[0005] The purpose of this invention is to provide an organic carrier recovery system for aramid dyeing wastewater to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution:

[0007] An organic carrier recovery system for aramid dyeing wastewater includes a wastewater tank. Two membrane separation components are installed on one side of the wastewater tank. Two pump bodies are connected to one side of the wastewater tank via two pipes. The pump bodies are connected to the corresponding membrane separation components via pipes. The middle part of the pipes is a flexible tube. Each membrane separation component is equipped with four drain pipes. Every two drain pipes form a group. Each group of drain pipes is connected to a pump body via a flexible tube. The output end of the pump body is connected to a pipe, which is connected to an extraction component. There are a total of four extraction components. Each extraction component has a transparent outlet pipe at its bottom. The bottom end of the transparent outlet pipe is connected to an electric three-way valve. One outlet port of the electric three-way valve is connected to a pipe, which has a pump body. The other end of the pipe is connected to a column separation component. A dilution pipe is installed on the wastewater tank via a bracket. The bottom end of the dilution pipe has outlet pipes evenly arranged.

[0008] Furthermore, the membrane separation assembly includes a separation chamber with a separation cover on top. The separation cover is divided into an upper cover and a lower cover, both of which are hollow. The other end of the second pipe is connected to the upper cover, and the interior of the second pipe communicates with the interior of the upper cover. The interiors of the upper cover and the lower cover are connected by multiple conductive pipes. The bottom of the lower cover is provided with multiple rectangular water outlet chambers, each with an opening at the bottom. The separation chamber contains an equal number of rectangular water outlet columns as the rectangular water outlet chambers. Water holes are evenly distributed on the outer surface of each rectangular water outlet column, and a filter membrane is wrapped around the outer surface of each rectangular water outlet column.

[0009] Furthermore, the filter membrane includes an inlet screen, a reverse osmosis membrane is disposed on one side of the inlet screen, a pure water guide cloth is disposed on one side of the reverse osmosis membrane, a secondary reverse osmosis membrane is disposed on one side of the pure water guide cloth, and a secondary pure water guide cloth is disposed on one side of the secondary reverse osmosis membrane. The inlet screen, the reverse osmosis membrane, the pure water guide cloth, the secondary reverse osmosis membrane, and the secondary pure water guide cloth are connected by a waterproof tape layer.

[0010] Furthermore, the extraction assembly includes an extraction chamber, a drive motor is fixedly installed at the top of the extraction chamber, the output end of the drive motor is connected to a stirring rod located inside the extraction chamber, stirring blades are evenly arranged at the bottom of the stirring rod, and an organic solvent pipe is provided on the extraction chamber.

[0011] Furthermore, a circulation pump is installed on the outer wall of the extraction chamber. Both the output and input ends of the circulation pump are equipped with connecting pipes, and two connecting pipes are respectively connected to the connecting pipes. The connecting pipes pass through the bottom and top of the extraction chamber, and the other end of the upper connecting pipe is connected to a water spray ring, which is located at the top of the extraction chamber.

[0012] Furthermore, the connecting tube is sleeved on the outer surface of the corresponding connecting tube, a sealing ring one is arranged inside the connecting tube, a sealing cylinder is fixedly sleeved on the outer surface of the connecting tube, the sealing cylinder is sleeved on the outer surface of the connecting tube, a sealing ring two is arranged inside the sealing cylinder, a secondary sealing cylinder is fixedly sleeved on the outer surface of the connecting tube, the secondary sealing cylinder is sleeved on the outer surface of the sealing cylinder, a sealing ring three is arranged inside the secondary sealing cylinder, the middle part of the connecting tube is also a flexible tube, and a color mark switch corresponding to the transparent outlet tube is provided at the bottom of the extraction box, the light emission port of the color mark switch is directly facing the transparent outlet tube.

[0013] Furthermore, the column separation assembly includes four rotating cylinders. A central tube is fixedly installed at the top center of each rotating cylinder, and a rotary joint is installed at the top of the central tube. The four pipes are respectively connected to the corresponding rotary joints. A top plate is installed below the top of each rotating cylinder, and a bottom plate is installed below the bottom of each rotating cylinder. Multiple bearings are fixedly installed at the bottom of the top plate. The central tube is fixedly passed through the inner shaft of the corresponding bearing and through the top plate. A rotating column is fixedly installed at the bottom center of each rotating cylinder. A secondary bearing is fixedly installed at the top of the bottom plate, and the bottom of the rotating column is sleeved with the corresponding secondary bearing. A corresponding drive gear is fixedly installed on the outer surface of each rotating cylinder. A secondary drive motor is fixedly installed on the top plate, and the output end of the secondary drive motor is connected to a secondary drive gear that meshes with one of the drive gears.

[0014] Furthermore, the outer surface of the rotating cylinder is provided with an integrated transparent window, and the rotating cylinder is provided with a pipe opening with a threaded sealing plug.

[0015] Furthermore, an electric telescopic rod is fixedly installed on the back of the separation box, a lifting rod is fixedly installed at the output top of the electric telescopic rod, a rotary motor is fixedly installed in the lifting rod storage cabinet, the output bottom of the rotary motor is connected to the top cover, and a rinsing pipe is connected to the top cover.

[0016] Furthermore, multiple filter plates are fixedly installed at the bottom of the separation box, forming a support space between the filter plates to support the bottom of the rectangular water outlet cavity. An auxiliary electric telescopic rod is fixedly installed at the bottom of the separation box, and the output top of the auxiliary electric telescopic rod is connected to a sealing plate that seals the support space. A final discharge pipe is also provided on the separation box. Sealing gaskets are provided on the top of the sealing plate and the outer surface of the rectangular water outlet cavity. Multiple sets of limiting components are provided on the inner wall of the separation box. Each set of limiting components consists of two limiting plates, which are sandwiched between the outer surfaces of each rectangular water outlet column.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] Water is added to the wastewater tank through a dilution pipe to dilute the aramid dyeing wastewater several times, ensuring better membrane separation results. The wastewater is then discharged into two membrane separation modules via pump one and pipe two, where it is separated, achieving separation of the organic carrier and most of the dye, ensuring better extraction results. The separated aramid dyeing water is discharged into the extraction module via a drain pipe, a connecting telescopic pipe, pump two, and pipe three. The extraction module, along with added organic solvents, extracts the organic carrier from the membrane separation permeate, further ensuring optimal column separation. Finally, the material requiring further separation and purification is discharged into the column separation module via a transparent outlet pipe, an electric three-way valve, and pipe four. Column separation further separates and purifies the organic carrier in the purified material. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a front view of an organic carrier recovery system for aramid dyeing wastewater according to an embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the top cover and the top cover of an organic carrier recovery system for aramid dyeing wastewater according to an embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of the interior of the separation tank of an organic carrier recovery system for aramid dyeing wastewater according to an embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of a rectangular effluent column of an organic carrier recovery system for aramid dyeing wastewater according to an embodiment of the present invention;

[0024] Figure 5 This is a schematic diagram of a waterproof tape layer in an aramid dyeing wastewater organic carrier recovery system according to an embodiment of the present invention;

[0025] Figure 6 This is a schematic diagram of the interior of the extraction tank of an organic carrier recovery system for aramid dyeing wastewater according to an embodiment of the present invention;

[0026] Figure 7 This is a schematic diagram of the connecting pipe and the connecting tube of an organic carrier recovery system for aramid dyeing wastewater according to an embodiment of the present invention;

[0027] Figure 8 This is a schematic diagram of a rotating cylinder for an organic carrier recovery system for aramid dyeing wastewater according to an embodiment of the present invention;

[0028] Figure 9 This is a schematic diagram of a filter plate in an organic carrier recovery system for aramid dyeing wastewater according to an embodiment of the present invention.

[0029] Figure label:

[0030] 1. Wastewater tank; 2. Pump body 1; 3. Pipe 2; 4. Drain pipe; 5. Telescopic pipe; 6. Pump body 2; 7. Pipe 3; 8. Transparent outlet pipe; 9. Electric three-way valve; 10. Pipe 4; 11. Pump body 3; 12. Dilution pipe; 13. Separation tank; 14. Top cover; 15. Bottom cover; 16. Conductor pipe; 17. Rectangular outlet chamber; 18. Rectangular outlet column; 19. Water hole; 20. Inlet screen; 21. Reverse osmosis membrane; 22. Pure water guide cloth; 23. Secondary reverse osmosis membrane; 24. Secondary pure water guide cloth; 25. Waterproof tape layer; 26. Extraction tank; 27. Drive motor; 28. Stirring rod; 29. ​​Stirring blade; 30. Organic solvent pipe; 31. Circulation... 31. Ring pump; 32. Connecting pipe; 33. Connecting pipe; 34. Sealing ring one; 35. Sealing cylinder; 36. Sealing ring two; 37. Secondary sealing cylinder; 38. Sealing ring three; 39. Color mark switch; 40. Rotating cylinder; 41. Central pipe; 42. Rotary joint; 43. Top plate; 44. Bottom plate; 45. Bearing; 46. Rotating column; 47. Secondary bearing; 48. Drive gear; 49. Secondary drive gear; 50. Lifting rod; 51. Rotary motor; 52. Flushing pipe; 53. Filter plate; 54. Support space; 55. Secondary electric telescopic rod; 56. Sealing plate; 57. Final discharge pipe; 58. Transparent window; 59. Pipe opening; 60. Sealing gasket; 61. Limiting plate. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Please see Figure 1-9 According to an embodiment of the present invention, an organic carrier recovery system for aramid dyeing wastewater includes a wastewater tank 1. Two membrane separation components are arranged on one side of the wastewater tank 1. Two pump bodies 2 are respectively connected to one side of the wastewater tank 1 via two pipes. The pump bodies 2 are connected to the corresponding membrane separation components via pipes 3. The middle part of the pipes 3 is a flexible tube. Each membrane separation component is provided with four drain pipes 4. Every two drain pipes 4 form a group. Each group of drain pipes 4 is connected to a pump body 6 via a telescopic pipe 5. The output end of the second 6 is connected to a pipe third 7, which is connected to an extraction assembly. There are four extraction assemblies in total. Each extraction assembly has a transparent outlet pipe 8 at its bottom. The bottom of the transparent outlet pipe 8 is connected to an electric three-way valve 9. One of the outlet ports of the electric three-way valve 9 is connected to a pipe fourth 10. The pipe fourth 10 has a pump body third 11, and the other end of the pipe fourth 10 is connected to a column separation assembly. A dilution pipe 12 is installed on the wastewater tank 1 by a bracket. The bottom of the dilution pipe 12 has outlet pipes evenly arranged.

[0033] Please see Figure 1-5The membrane separation assembly includes a separation chamber 13, with a separation cover on top. The separation cover is divided into an upper cover 14 and a lower cover 15, both of which are hollow. The other end of a pipe 3 is connected to the upper cover 14, and the interior of the pipe 3 communicates with the interior of the upper cover 14. The interiors of the upper cover 14 and the lower cover 15 are connected by multiple conductive pipes 16. The bottom of the lower cover 15 is provided with multiple rectangular water outlet chambers 17, each with an opening at the bottom. The separation chamber 13 contains an equal number of rectangular water outlet chambers 17. A rectangular water column 18 has water holes 19 evenly distributed on its outer surface. A filter membrane is wrapped around the outer surface of the rectangular water column 18. The filter membrane includes an inlet screen 20, a reverse osmosis membrane 21 on one side of the inlet screen 20, a pure water guide cloth 22 on one side of the reverse osmosis membrane 21, a secondary reverse osmosis membrane 23 on one side of the pure water guide cloth 22, and a secondary pure water guide cloth 24 on one side of the secondary reverse osmosis membrane 23. The inlet screen 20, the reverse osmosis membrane 21, the pure water guide cloth 22, the secondary reverse osmosis membrane 23, and the secondary pure water guide cloth 24 are connected by a waterproof barrier. The tape layer 25 is used for connection. Due to the high salt concentration in the aramid dyeing wastewater, which significantly affects separation, water needs to be added to the wastewater tank 1 using the dilution pipe 12 to dilute the aramid dyeing wastewater. Subsequently, the diluted wastewater is separated using membrane technology. The wastewater is discharged into the upper cover 14 through pump body 2 and pipe 3, and then enters the lower cover 15 through the guide pipe 16. The rectangular water outlet cavity 17 at the bottom of the lower cover 15 seals the top of the rectangular water outlet column 18, ultimately discharging the water into the rectangular water outlet column 18 and then out through the evenly distributed water holes 19 on the outer surface of the rectangular water outlet column 18. During the discharge process, the water is discharged through the membrane layer 25. The inlet water separator 20, reverse osmosis membrane 21, pure water guide cloth 22, auxiliary reverse osmosis membrane 23, and auxiliary pure water guide cloth 24 perform layer-by-layer filtration. Finally, the water passes through the drain pipe 4 and the telescopic pipe 5 connected to the drain pipe 4, the pump body 2 6 and its pipe 3 7, and discharges the separated aramid dyeing water into the extraction module for the next extraction process. The inlet water separator 20, reverse osmosis membrane 21, pure water guide cloth 22, auxiliary reverse osmosis membrane 23 and auxiliary pure water guide cloth 24 are connected as a whole by a waterproof tape layer 25. The inlet water separator 20 is the inner layer that fits the outer surface of the rectangular water outlet column 18 and is also connected by a wrapping connection using a waterproof tape layer 25.

[0034] Please see Figure 1 , Figure 6 and Figure 7The extraction assembly includes an extraction chamber 26. A drive motor 27 is fixedly mounted on the top of the extraction chamber 26. The output end of the drive motor 27 is connected to a stirring rod 28 located inside the extraction chamber 26. Stirring blades 29 are evenly arranged at the bottom of the stirring rod 28. An organic solvent pipe 30 is provided on the extraction chamber 26. A circulation pump 31 is installed on the outer wall of the extraction chamber 26. Both the output and input ends of the circulation pump 31 are provided with connecting pipes 32. Connecting pipes 33 are respectively connected to the connecting pipes 32. There are two connecting pipes 33. The connecting pipes 33 pass through the bottom and top of the extraction chamber 26. The other end of the upper connecting pipe 33 is connected to a water spray ring. The water spray ring is located in the extraction chamber 26. At the top inner part, the connecting tube 33 is sleeved on the outer surface of the corresponding connecting tube 32. A sealing ring 34 is arranged inside the connecting tube 33. A sealing cylinder 35 is fixedly sleeved on the outer surface of the connecting tube 32. The sealing cylinder 35 is sleeved on the outer surface of the connecting tube 33. A sealing ring 36 is arranged inside the sealing cylinder 35. A secondary sealing cylinder 37 is fixedly sleeved on the outer surface of the connecting tube 33. The secondary sealing cylinder 37 is sleeved on the outer surface of the sealing cylinder 35. A sealing ring 38 is arranged inside the secondary sealing cylinder 37. The middle part of the connecting tube 33 is also a flexible tube. A color mark switch 39 corresponding to the transparent outlet tube 8 is provided at the bottom of the extraction box 26. The light emission port of the color mark switch 39 is directly facing the transparent outlet tube 8, ultimately... The separated wastewater enters the extraction tank 26 through pipe 37, and the organic solvent enters the extraction tank 26 through organic solvent pipe 30. The mixture is stirred by the stirring blades 29. During stirring, the mixture at the bottom of the extraction tank 26 is drawn by the circulating pump 31 and then discharged to the top of the extraction tank 26 through a water spray ring to improve mixing efficiency. After mixing, the organic carrier containing a small amount of dye is extracted from the membrane separation permeate using the organic solvent. Finally, the liquid inside can be discharged using the electric three-way valve 9. Specifically, only pipe 410 is described. Pipe 410 connects to the subsequent column separation assembly. The electric three-way valve 9 also connects to other pipes for transporting different liquid substances. The light emission port of the color mark switch 39 is directly opposite the transparent outlet pipe 8. The color change of a substance can be determined by emitting and receiving reflected light. This color change indicates the substance passing through the transparent outlet pipe 8. A color-changing switch and an electric three-way valve 9 are connected to a main control cabinet, which controls all electrical components of the equipment. This is an existing structure and will not be described in detail here. On this control cabinet, the color-changing switch detects the change in substance passing through the transparent outlet pipe 8 and transmits a signal to the control cabinet. The control cabinet then sends a signal to the electric three-way valve 9 to change the liquid discharge path, thus achieving automatic water discharge. The required material is discharged along pipe 4 10 to the subsequent column separation assembly without the need for manual observation of substance changes or opening and closing valves, saving labor. If a different colored liquid is detected, that liquid is dilution water.The dilution water can be discharged into the wastewater tank via another port of the electric three-way valve 9, a separate pipe, and a separate pump body for reuse.

[0035] The extraction tank 26 is also designed with a cleaning pipe and a cleaning drain pipe. The cleaning pipe and drain pipe require separate control valves for opening and closing, which makes it convenient to clean the inside of the extraction tank 26 later. The connecting pipe 33 is sleeved on the outer surface of the connecting pipe 32, and the sealing ring 1 34 wraps around the outer surface of the connecting pipe 32 to install a first seal. At this time, the sealing cylinder 35 is sleeved on the outer surface of the connecting pipe 33, and the sealing ring 2 36 wraps around the outer surface of the connecting pipe 33 to install a second seal. Finally, the secondary sealing cylinder 37 is sleeved on the outer surface of the sealing cylinder 35, and the sealing ring 38 wraps around the outer surface of the sealing cylinder 35 to install a third seal. Finally, screws are provided to tighten the threads of the secondary sealing cylinder 37 and the sealing cylinder 35 to ensure that the circulating pump 31 can be disassembled and installed later, and can be repaired and replaced if the circulating pump 31 is damaged. The pump body designed in this invention can also be sealed using this installation method.

[0036] Please see Figure 1 and Figure 8The column separation assembly includes four rotating cylinders 40. A central tube 41 is fixedly installed at the top center of each rotating cylinder 40. A rotary joint 42 is installed at the top of each central tube 41. Each of the four rotating cylinders 40 is connected to a corresponding rotary joint 42. A top plate 43 is installed below the top of each rotating cylinder 40, and a bottom plate 44 is installed below the bottom of each rotating cylinder 40. Multiple bearings 45 are fixedly installed at the bottom of the top plate 43. The central tube 41 passes through the inner shaft of the corresponding bearing 45 and through the top plate 43. A rotary joint 45 is fixedly installed at the bottom center of each rotating cylinder 40. The rotating column 46 has a secondary bearing 47 fixedly mounted on the top of the base plate 44. The bottom of the rotating column 46 is fitted with a corresponding secondary bearing 47. A corresponding drive gear 48 is fixedly mounted on the outer surface of the rotating cylinder 40. A secondary drive motor is fixedly mounted on the top plate 43. The output end of the secondary drive motor is connected to a secondary drive gear 49 that meshes with one of the drive gears 48. An integrated transparent window 58 is provided on the outer surface of the rotating cylinder 40. The rotating cylinder 40 has a pipe opening 59 with a threaded sealing plug. A transparent outlet pipe 8 and an electric three-way valve 9 are used for connection. Pipeline 410 discharges the material requiring further separation and purification into the column separation assembly. The column separates high-purity organic carriers for separation and purification. After entering their respective rotating drums 40, the auxiliary drive motor is activated, driving the auxiliary drive gear 49 to rotate. The drive gears 48 mesh with each other, with the auxiliary drive gear 49 meshing with only one of the drive gears 48, simultaneously rotating the rotating drums 40. This causes the liquid within the rotating drums 40 to rotate at high speed, promoting high-speed separation and chromatography. Once the original solution becomes the chromatographic solution, the threaded seal is opened, and the other pipes are manually removed. Inserted into the rotating cylinder 40, the tube connects to the extraction pump. The tube contacts the surface of the chromatography liquid, and then the extraction pump is turned on to complete the layer-by-layer liquid extraction process. Finally, the high-purity organic carrier is separated and purified using the column. The bearing design ensures the rotational stability of the corresponding rotating cylinder 40. A cleaning pipe and a cleaning drain pipe can also be designed on the rotating cylinder 40. The cleaning pipe and drain pipe need to be equipped with separate control valves for opening and closing, which makes it more convenient to clean the inside of the rotating cylinder 40 later. The high-purity organic carrier is separated and purified using the column.

[0037] Please see 2 and Figure 9An electric telescopic rod is fixedly installed on the back of the separation box 13. A lifting rod 50 is fixedly installed at the output top of the electric telescopic rod. A rotary motor 51 is fixedly installed in the storage cabinet of the lifting rod 50. The output bottom of the rotary motor 51 is connected to the upper cover 14. A flushing pipe 52 is connected to the upper cover 14. Multiple filter plates 53 are fixedly installed at the bottom of the separation box 13. The filter plates 53 form a support space 54 that supports the bottom of the rectangular water outlet cavity 17. An auxiliary electric telescopic rod 55 is fixedly installed at the bottom of the separation box 13. A sealing plate 56 that seals the support space 54 is connected to the output top of the auxiliary electric telescopic rod 55. The separation chamber 13 is also equipped with a final discharge pipe 57. Sealing gaskets 60 are provided on the top of the sealing plate 56 and the outer surface of the rectangular water outlet cavity 17. Multiple sets of limiting components are provided on the inner wall of the separation chamber 13. Each set of limiting components consists of two limiting plates 61, which are clamped between the outer surfaces of each rectangular water outlet column 18. Specifically, the rectangular water outlet column 18 and the filter membrane are integrated. The limiting plates 61 clamp the rectangular water outlet column 18 between its outer surfaces, meaning that the rectangular water outlet column 18 and the filter membrane are inserted together between two rectangular water outlet columns 18, with the bottom of the rectangular water outlet column 18 ultimately aligned with the support cavity. Insertion is performed in space 54, which clamps the rectangular water outlet column 18 and the filter membrane it encloses. Then, the rectangular water outlet cavity 17 at the bottom of the lower cover 15 is inserted into the top of the rectangular water outlet column 18. The limiting plate 61 then limits the two sides of the rectangular water outlet column 18, ensuring its vertical installation within the separation box 13. The designed auxiliary electric telescopic rod 55 drives all the sealing plates 56 to rise, inserting them into the corresponding supporting space 54. At this point, the sealing gasket 60 at the top of the sealing plate 56 seals the bottom of the rectangular water outlet column 18, ultimately sealing the bottom and top of the rectangular water outlet column 18 and ensuring the entry of the rectangular water outlet column 18. Water inside the rectangular water column 18 is discharged through the water hole for filtration. Subsequently, the electric telescopic rod drives the lifting rod 50 and the top cover 14 to rise, and the rotary motor 51 drives the top cover 14 to rotate, causing the top of the separation box 13 to be exposed. This makes it easy to remove the rectangular water column 18 inside for replacement. When it is necessary to rinse the inside of the rectangular water column 18, the auxiliary electric telescopic rod 55 drives the sealing gasket 60 to not block the bottom of the rectangular water column 18. The rinsing pipe 52 discharges rinsing water into the rectangular water column 18 to rinse the inside of the rectangular water column 18. The rinsing water exits from the bottom of the rectangular water column 18 and is discharged into the bottom of the separation box 13, and finally discharged through the final discharge pipe 57.

[0038] To facilitate understanding of the above technical solutions of the present invention, the working principle or operation method of the present invention in actual process will be described in detail below:

[0039] In practical applications, due to the high salt concentration in aramid dyeing wastewater, which significantly affects separation, it is necessary to add water to the wastewater tank 1 using dilution pipe 12 to dilute the aramid dyeing wastewater. Subsequently, the diluted wastewater is separated using membrane technology. The wastewater is discharged into two membrane separation components through pump body 1 2 and pipe 2 3 to complete the separation of the wastewater, that is, to separate the organic carrier and most of the dye. The separated dye solution contains organic carrier, a small amount of dye and some salt. Then, through drain pipe 4 and the telescopic pipe 5 connected to drain pipe 4, pump body 2 6 and pipe 3 7, the separated aramid dyeing water is discharged into the extraction component. The extraction component and the organic solvent added inside are used to extract the organic carrier in the membrane separation permeate, which contains a small amount of dye. Finally, the material that needs to be separated and purified again is discharged into the column separation component through transparent outlet pipe 8, electric three-way valve 9 and pipe 4 10. The column separation further separates and purifies the organic carrier in the purified material.

[0040] The above process can extract 20 mL of organic carrier with a purity of up to 95% from 1 L of aramid dyeing wastewater. Based on this data, if 10 t of raw aramid dyeing wastewater is taken, about 200 L of organic carrier can be extracted. The extraction amount of 40 t of raw aramid dyeing wastewater is expected to reach 800 L. The specific design involves two sets of membrane separation components, four sets of extraction components, and one set of column separation components for overall operation. Control valves need to be designed on the designed pipes 1, 4, 8, 33, 57, and 52. Ultimately, this invention effectively reduces the cost of aramid dyeing by recovering the carrier without changing its performance, thus promoting green and environmentally friendly aramid dyeing.

[0041] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An organic carrier recovery system for aramid dyeing wastewater, characterized in that, The system includes a wastewater tank (1), on one side of which two membrane separation components are provided. Two pump bodies (2) are connected to one side of the wastewater tank (1) via two pipes. The pump bodies (2) are connected to the corresponding membrane separation components via pipes (3). The middle part of the pipes (3) is a flexible tube. Each membrane separation component is provided with four drain pipes (4). Every two drain pipes (4) are set as a group. Each group of drain pipes (4) is connected to a pump body (6) via a telescopic pipe (5). The output end of the pump body (6) is connected to a pipe (7). The pipe (7) is connected to an extraction component. The total number of extraction components is four. Each extraction component has a transparent outlet pipe at its bottom. (8), the bottom end of the transparent outlet pipe (8) is connected to an electric three-way valve (9), one of the outlet ports of the electric three-way valve (9) is connected to a pipe four (10), the pipe four (10) has a pump body three (11), and the other end of the pipe four (10) is connected to a column separation assembly. The wastewater tank (1) is equipped with a dilution pipe (12) by a bracket. The bottom end of the dilution pipe (12) is evenly arranged with outlet pipes. The membrane separation assembly includes a separation box (13). The top of the separation box (13) is covered with a separation cover. The separation cover is divided into an upper cover (14) and a lower cover (15). The interior of the upper cover (14) and the lower cover (15) are both hollow. The other end of the pipe two (3) is connected to the upper cover. (14) Connected, and the interior of the second pipe (3) is connected to the interior of the upper cover (14). The interior of the upper cover (14) and the lower cover (15) are connected by multiple guide pipes (16). The bottom end of the lower cover (15) is provided with multiple rectangular water outlet chambers (17). The bottom end of the rectangular water outlet chambers (17) has an opening. The separation box (13) is provided with a number of rectangular water outlet columns (18) equal to the number of rectangular water outlet chambers (17). The outer surface of the rectangular water outlet columns (18) is uniformly provided with water holes (19). The outer surface of the rectangular water outlet columns (18) is wrapped with a filter membrane. The filter membrane includes an inlet screen (20). A reverse osmosis membrane (21) is provided on one side of the inlet screen (20). A pure water guide cloth (22) is provided on one side of the reverse osmosis membrane (21), and a secondary reverse osmosis membrane (23) is provided on one side of the pure water guide cloth (22). A secondary pure water guide cloth (24) is provided on one side of the secondary reverse osmosis membrane (23). The inlet mesh (20), the reverse osmosis membrane (21), the pure water guide cloth (22), the secondary reverse osmosis membrane (23), and the secondary pure water guide cloth (24) are connected by a waterproof tape layer (25). Multiple filter plates (53) are fixedly provided at the bottom of the separation box (13). The filter plates (53) form a support space (54) to support the bottom of the rectangular outlet cavity (17). A secondary electric telescopic rod (55) is fixedly provided at the bottom of the separation box (13).The output top of the auxiliary electric telescopic rod (55) is connected to a sealing plate (56) that seals the support space (54). A final discharge pipe (57) is also provided on the separation box (13). Sealing gaskets (60) are provided on the top of the sealing plate (56) and the outer surface of the rectangular water outlet cavity (17). Multiple sets of limiting components are provided on the inner wall of the separation box (13). Each set of limiting components consists of two limiting plates (61), which are sandwiched between the outer surfaces of each rectangular water outlet column (18).

2. The organic carrier recovery system for aramid dyeing wastewater according to claim 1, characterized in that, The extraction assembly includes an extraction chamber (26), a drive motor (27) is fixedly installed at the top of the extraction chamber (26), the output end of the drive motor (27) is connected to a stirring rod (28) located inside the extraction chamber (26), stirring blades (29) are evenly arranged at the bottom of the stirring rod (28), and an organic solvent pipe (30) is provided on the extraction chamber (26).

3. The organic carrier recovery system for aramid dyeing wastewater according to claim 2, characterized in that, A circulation pump (31) is installed on the outer wall of the extraction tank (26). Both the output and input ends of the circulation pump (31) are provided with connecting pipes (32). Connecting pipes (33) are respectively connected to the connecting pipes (32). There are two connecting pipes (33). The connecting pipes (33) pass through the bottom and top of the extraction tank (26). The other end of the upper connecting pipe (33) is connected to a water spray ring. The water spray ring is located at the top of the extraction tank (26).

4. The organic carrier recovery system for aramid dyeing wastewater according to claim 3, characterized in that, The connecting tube (33) is sleeved on the outer surface of the corresponding connecting tube (32). A sealing ring (34) is arranged inside the connecting tube (33). A sealing cylinder (35) is fixedly sleeved on the outer surface of the connecting tube (32). The sealing cylinder (35) is sleeved on the outer surface of the connecting tube (33). A sealing ring (36) is arranged inside the sealing cylinder (35). A secondary sealing cylinder (37) is fixedly sleeved on the outer surface of the connecting tube (33). The secondary sealing cylinder (37) is sleeved on the outer surface of the sealing cylinder (35). A sealing ring (38) is arranged inside the secondary sealing cylinder (37). The middle part of the connecting tube (33) is also a flexible tube. A color mark switch (39) corresponding to the transparent outlet tube (8) is provided at the bottom of the extraction box (26). The light emission port of the color mark switch (39) is facing the transparent outlet tube (8).

5. The organic carrier recovery system for aramid dyeing wastewater according to claim 4, characterized in that, The column separation assembly includes four rotating cylinders (40). A central tube (41) is fixedly provided at the middle of the top of each rotating cylinder (40). A rotary joint (42) is provided at the top of the central tube (41). The four pipes (10) are respectively connected to the corresponding rotary joints (42). A top plate (43) is provided below the top of each rotating cylinder (40). A bottom plate (44) is provided below the bottom of each rotating cylinder (40). Multiple bearings (45) are fixedly provided at the bottom of the top plate (43). The central tube (41) passes through the corresponding bearings. The inner shaft of the rotating cylinder (40) is fixedly provided with a rotating column (46) at the bottom center of the rotating cylinder (40), and a secondary bearing (47) is fixedly provided at the top of the bottom plate (44). The bottom of the rotating column (46) is sleeved with the corresponding secondary bearing (47). A corresponding drive gear (48) is fixedly sleeved on the outer surface of the rotating cylinder (40). A secondary drive motor is fixedly provided on the top plate (43). The output end of the secondary drive motor is connected to a secondary drive gear (49) that meshes with one of the drive gears (48).

6. The organic carrier recovery system for aramid dyeing wastewater according to claim 5, characterized in that, The outer surface of the rotating cylinder (40) is provided with an integrated transparent window (58), and the rotating cylinder (40) is provided with a pipe opening (59) with a threaded sealing plug.

7. The organic carrier recovery system for aramid dyeing wastewater according to claim 6, characterized in that, An electric telescopic rod is fixedly provided on the back of the separation box (13), and a lifting rod (50) is fixedly provided at the output top of the electric telescopic rod. A rotary motor (51) is fixedly provided in the storage cabinet of the lifting rod (50). The output bottom of the rotary motor (51) is connected to the top cover (14), and a rinsing pipe (52) is connected to the top cover (14).

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