Device and method for recycling wastewater and recovering dye used for dyeing chemical fiber fabric

Abstract

The present application relates to a device and method for recycling wastewater and dye used for dyeing chemical fiber fabric, belonging to the field of sewage treatment technology. The device comprises a regulating and storing tank, a collecting box I, a resolving barrel, a collecting box II, a recovery tank I and a recovery tank II. The regulating and storing tank homogenously treats the dyeing wastewater through a stirring shaft, and sends the wastewater into the settling tank of the collecting box I through a water pump I. The dosing assemblies I and II add coagulant and coagulant aid to form floc to precipitate, and the supernatant enters the collecting tank. The two containing boxes in the resolving barrel are filled with activated carbon, and the supernatant is delivered through a water pump II to adsorb dye by the activated carbon. The saturated activated carbon is resolved by the resolving assembly, and the two containing boxes are alternately used by driving of a motor. The resolved dye liquid enters the recovery tank I through the collecting box II for recovery. The treated clean water is sent into the recovery tank II through a water pump IV for recycling. The present application realizes efficient recycling of dye and wastewater, improves the treatment continuity and resource utilization rate, and reduces the production cost and environmental pollution.

Description

Technical Field

[0001] This invention belongs to the field of wastewater treatment technology, and relates to a device and method for wastewater reuse and dye recovery for dyeing chemical fiber fabrics. Background Technology

[0002] Due to their excellent physical properties and chemical stability, synthetic fiber fabrics are widely used in clothing, home textiles and other fields. However, the dyeing process, as a key link in the production of synthetic fiber fabrics, generates a large amount of wastewater containing pollutants such as dyes, auxiliaries and surfactants. This wastewater has a complex composition, high color and high COD value. If it is discharged directly, it will not only cause serious pollution to the water environment and disrupt the ecological balance, but also lead to a large waste of resources such as dyes.

[0003] Currently, the main treatment methods for dyeing wastewater from synthetic fiber fabrics include physical, chemical, and biological methods. Among physical methods, adsorption often uses activated carbon as an adsorbent, which has a certain removal effect on dyes in wastewater. However, traditional adsorption devices are mostly single adsorption units. When the activated carbon is saturated, it needs to be shut down for replacement or regeneration, which affects the treatment efficiency. Moreover, the regeneration process is complex and difficult to achieve continuous and stable operation. Chemical methods remove pollutants by adding coagulants, oxidants, and other agents. Although they can reduce the color and COD of wastewater, the dyes are difficult to recover. Biological methods utilize the metabolic action of microorganisms to degrade pollutants, but they are more sensitive to water quality fluctuations, have long treatment cycles, and have limited removal effects, especially on some difficult-to-degrade synthetic dyes.

[0004] Meanwhile, existing treatment devices are significantly inadequate in terms of resource recovery. Most devices focus only on the purification of wastewater and fail to effectively recover dye resources from the wastewater, resulting in a large amount of valuable dye being discharged with the wastewater or remaining in the sludge, causing a waste of resources.

[0005] Therefore, we propose a wastewater reuse and dye recovery device and method for dyeing chemical fiber fabrics to solve the problems mentioned above. Summary of the Invention

[0006] In view of this, in order to solve the above problems, the present invention provides a device and method for wastewater reuse and dye recovery in the dyeing of chemical fiber fabrics.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a wastewater reuse and dye recovery device for dyeing chemical fiber fabrics, comprising:

[0008] Regulating reservoir;

[0009] Collection tank I is located on one side of the regulating tank, and a sedimentation tank and a collection tank are provided inside the collection tank I;

[0010] Water pump I is installed on the regulating tank. The inlet of water pump I is connected to the regulating tank through a pipe, and the outlet is connected to the sedimentation tank through a pipe.

[0011] Dosing assembly I and dosing assembly II are located on one side of the collection tank I and are used to add coagulant and coagulant aid to the sedimentation tank, respectively.

[0012] The analysis tank is rotatably disposed in the collection pool. The analysis tank includes a support frame and two containers for holding activated carbon. The two ends of the containers are respectively connected to connecting pipe I and connecting pipe II, and connecting pipe II extends into the collection pool.

[0013] Water pump II is installed on one side of the collection tank I. The water inlet of water pump II is connected to the collection tank I through a pipe, and the drain outlet is connected to the connecting pipe I through a pipe.

[0014] A desorption component, located on one side of the collection pool, is used to rinse saturated activated carbon to desorb dye;

[0015] Collection box II, located on one side of the collection pool, is used to collect the dissolved dye liquid;

[0016] Recycling pool I is located on one side of the collection box II;

[0017] Water pump III is installed between the collection tank II and the recycling pool I;

[0018] Recycling pool II is located on one side of collection box I;

[0019] Water pump IV is installed between the recycling tank II and the collection tank I, with the inlet end of water pump IV connected to the collection tank;

[0020] In this process, wastewater settles in the sedimentation tank to form a supernatant. The supernatant is pumped by pump II to the containment tank for adsorption treatment. The treated water is returned to the collection tank through the connecting pipe II. Saturated activated carbon desorbs the dye through the desorption component. The desorbed liquid is collected in the collection tank II and pumped to the recovery tank I by pump III. The clean water in the collection tank is pumped to the recovery tank II by pump IV. By rotating the desorption tank, the two sets of containment tanks work alternately to achieve continuous wastewater treatment and dye recovery.

[0021] As a further improvement to the above technical solution:

[0022] The two receiving boxes and the support frame are combined into a cylindrical shape. Multiple support rollers are fixedly installed in the collection pool. The analytical barrel is installed on the multiple support rollers. A motor II is fixedly installed on one side of the collection box I. A drive shaft is rotatably installed on one side of the collection box I. One end of the drive shaft is fixedly connected to the output end of the motor II. The drive shaft is connected to the analytical barrel through gears and a gear ring.

[0023] The analytical assembly includes an inlet pipe II that is rotatably disposed within the support frame. A dosing assembly III is provided on one side of the collection box I. The dosing assembly III is connected to one end of the inlet pipe II. The other end of the inlet pipe II is sealed. Multiple rotating rings are rotatably sleeved on the outer wall of the inlet pipe II. Two symmetrically arranged extension pipes are connected to the outer walls of the rotating rings. A through hole is opened at the bottom of the inlet pipe II, which is connected to the extension pipe below. Drainage holes are opened on both sides of the extension pipe.

[0024] Multiple sets of filter plates are fixedly installed inside the container box. A chamber for holding activated carbon is formed between two adjacent sets of filter plates. A rectangular opening is opened at the bottom of the container box corresponding to each set of filter plates. The extension tube passes through the support frame and the container box and extends into the rectangular opening.

[0025] It also includes multiple sets of partitions I and II, which are alternately fixed to the outer wall of the extension tube and located in the corresponding rectangular openings. The outer wall of the receiving box is provided with insertion holes for insertion into the extension tube.

[0026] A partition strip is fixedly provided inside the extension tube, which divides the extension tube into two cavities. Multiple sealing rings are rotatably fitted on the outer walls of the two receiving boxes and the support frame. The sealing rings are fixedly connected to the collection box I, and the through holes correspond to the insertion holes that are aligned vertically. A guide tube is fixedly provided at the bottom of the multiple sealing rings, and the guide tube is connected to the multiple extension tubes below.

[0027] It also includes a first insertion mechanism, which includes a fixed base fixedly disposed on the top of one side of the collection box I. A liquid inlet pipe I is fixedly disposed through one side of the fixed base. The bottom end of the liquid inlet pipe I is connected to the drain end of the water pump II. A sliding pipe I is slidably disposed at the other end of the liquid inlet pipe I. The outer diameter of the sliding pipe I is adapted to the inner diameter of the connecting pipe I. A guide rod is fixedly disposed on one side of the fixed base. A sliding frame I is slidably sleeved on the outer wall of the guide rod. The top end of the sliding frame I is fixedly sleeved on the outer wall of the sliding pipe I. A plug I is fixedly disposed through the bottom end and inserted into the connecting pipe I below. An electric push rod I is fixedly disposed on one side of the fixed base. The output end of the electric push rod I is fixedly connected to one side of the sliding frame I.

[0028] It also includes a second insertion mechanism, which includes a drain pipe I fixedly disposed on the top of the other side of the collection tank I. The bottom end of the drain pipe I extends into the collection pool. The other end of the drain pipe I is slidably provided with a sliding pipe II. The other end of the sliding pipe II is inserted into the connecting pipe II. A sliding frame II is slidably sleeved on the outer wall of the inlet pipe II. The sliding pipe II is fixedly disposed through the top end of the sliding frame II. A plug II is fixedly disposed through one side of the sliding frame II and inserted into the connecting pipe II below. A sliding pipe III is fixedly disposed through the bottom end of the sliding frame II and inserted into the guide pipe. The other end of the sliding pipe III is slidably sleeved with a drain pipe III. The drain pipe III is fixedly disposed through one side of the collection tank I. The other end of the drain pipe III extends into the collection tank II. An electric push rod II is fixedly disposed on one side of the drain pipe I. The output end of the electric push rod II is fixedly connected to the sliding frame II.

[0029] The dosing assembly I, the dosing assembly II, and the dosing assembly III all include a medicine tank. A motor I is fixedly installed on the top of the medicine tank and the regulating tank. A stirring shaft is fixedly installed at the output end of the motor I. A water pump V is fixedly installed on one side of the medicine tank. The water inlet of the water pump V is connected to the medicine tank through a pipe. The drain ends of the three water pumps V extend through pipes to the collection tank I and are connected to the liquid inlet pipe II.

[0030] Before sealing, one end of the guide tube is used to drain the moisture from the activated carbon before desorption, and after sealing, it is used to discharge the desorbed ethanol mixture to avoid the filtered water from mixing with the ethanol.

[0031] A method for wastewater reuse and dye recovery in the dyeing of synthetic fiber fabrics, using the aforementioned wastewater reuse and dye recovery device for dyeing synthetic fiber fabrics, includes the following steps:

[0032] S1. Input the dyeing wastewater into the regulating tank for homogenization and stirring;

[0033] S2. The homogenized wastewater is pumped to the sedimentation tank by the water pump I, and coagulant and coagulant aid are added to carry out sedimentation to form supernatant;

[0034] S3. The supernatant is pumped into the container by the water pump II, and the dye is adsorbed by activated carbon.

[0035] S4. When the activated carbon is saturated with adsorption, rotate the desorption tank to switch the containment box, and desorb the saturated activated carbon through the desorption component to recover the dye;

[0036] S5. Collect the eluent into the collection tank II, and pump it to the recovery tank I through the water pump III for dye recovery;

[0037] S6. The treated clean water in the collection tank is pumped to the recycling tank II for reuse by the water pump IV.

[0038] The two sets of containers work alternately to achieve continuous processing.

[0039] The beneficial effects of this invention are as follows:

[0040] 1. The wastewater reuse and dye recovery device for dyeing chemical fiber fabrics disclosed in this invention consists of a regulating tank and a water pump I forming a homogeneous conveying system. Through a flow guide structure optimized by fluid dynamics, the dyeing wastewater is uniformly mixed with fiber fragments and chemical auxiliaries during the regulating stage, preventing large particles from directly entering the sedimentation tank and causing pipeline blockage. With the help of the frequency-controlled water pump I, the conveying flow rate can be adjusted in real time according to the wastewater concentration to ensure the stable formation of the sludge layer in the subsequent sedimentation tank.

[0041] 2. The wastewater recycling and dye recovery device for dyeing chemical fiber fabrics disclosed in this invention adopts a dual-cavity rotating structure for the analytical tank, which allows two sets of activated carbon to be used alternately. In addition, during the adsorption and filtration process, the staggered arrangement of S-shaped guide plates can be used to extend the residence time of the supernatant in the activated carbon bed, ensuring that the dye molecules are fully adsorbed. During the adsorption process, the saturated activated carbon at the bottom can be eluted to improve the recovery efficiency.

[0042] 3. The wastewater reuse and dye recovery device for dyeing chemical fiber fabrics disclosed in this invention uses reciprocating sealing technology through the first and second plug-in mechanisms. After switching the receiving tank, the waste pipeline can be automatically blocked to avoid cross-contamination between the elution liquid and the clean water.

[0043] 4. The wastewater recycling and dye recovery device for dyeing chemical fiber fabrics disclosed in this invention prevents liquid leakage during the analysis process by rotating and sleeved multiple sealing rings on the outer walls of two receiving tanks and support frame. The bottom of the sealing ring is connected to a guide pipe, which is connected to the recovery cavity of the extension pipe to discharge the water in the activated carbon before analysis, avoid the supernatant after filtration from mixing with ethanol, and can immediately discharge the ethanol mixture after the supernatant is discharged.

[0044] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0045] To make the objectives, technical solutions, and advantages of the present invention clearer, the preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, wherein:

[0046] Figure 1 This is a three-dimensional structural schematic diagram of the wastewater reuse and dye recovery device for dyeing chemical fiber fabrics according to the present invention.

[0047] Figure 2 This is a schematic diagram of the connection structure between the analytical tank and the motor in the wastewater reuse and dye recovery device for dyeing chemical fiber fabrics according to the present invention.

[0048] Figure 3 This is a schematic diagram of the connection structure between the analytical tank and the drain pipe of the wastewater reuse and dye recovery device for dyeing chemical fiber fabrics according to the present invention.

[0049] Figure 4 This is a cross-sectional view of the analytical tank structure of the wastewater reuse and dye recovery device for dyeing chemical fiber fabrics according to the present invention.

[0050] Figure 5 This is a cross-sectional structural diagram of the container of the wastewater reuse and dye recovery device for dyeing chemical fiber fabrics according to the present invention.

[0051] Figure 6 This is a cross-sectional schematic diagram of the support frame structure of the wastewater reuse and dye recovery device for dyeing chemical fiber fabrics according to the present invention.

[0052] Figure 7 This is a cross-sectional view of the analytical tube structure of the wastewater reuse and dye recovery device for dyeing chemical fiber fabrics according to the present invention.

[0053] Reference numerals: 1. Storage tank; 2. Motor I; 3. Stirring shaft; 4. Collection tank I; 5. Sedimentation tank; 6. Collection tank; 7. Water pump I; 8. Dosing assembly I; 9. Dosing assembly II; 10. Water pump II; 11. Desorption tank; 12. Dosing assembly III; 13. Collection tank II; 14. Water pump III; 15. Recovery tank I; 16. Water pump IV; 17. Recovery tank II; 18. Chemical tank; 19. Water pump V; 20. Inlet pipe I; 21. Fixing base; 22. Guide rod; 23. Sliding frame I; 24. Plug I; 25. Sliding pipe I; 26. Electric push rod I; 27. 1. Motor II; 28. Drive shaft; 29. ​​Support roller; 30. Inlet pipe II; 31. Drain pipe I; 32. Sliding pipe II; 33. Sliding frame II; 34. Drain pipe III; 35. Sliding pipe III; 36. Plug II; 37. Electric push rod II; 38. Rotating ring; 39. Extension pipe; 40. Partition I; 41. Partition II; 42. Container box; 43. Filter plate; 44. Connecting pipe I; 45. Connecting pipe II; 46. Support frame; 47. Guide pipe; 48. Rectangular opening; 49. Insertion hole; 50. Drain hole; 51. Separator strip; 52. Through hole; 53. Sealing ring. Detailed Implementation

[0054] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0055] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the invention. To better illustrate the embodiments of the invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0056] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components. In the description of the present invention, it should be understood that if terms such as "upper," "lower," "left," "right," "front," and "rear" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting the present invention. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0057] like Figures 1-7 As shown, the wastewater recycling and dye recovery device for dyeing chemical fiber fabrics is mainly used to treat the wastewater generated during the dyeing process of chemical fiber fabrics. Through a series of treatment steps, the wastewater is recycled and the dye is recovered and reused.

[0058] It includes a regulating tank 1, which is located at the initial end of the device and is used to temporarily store dyeing wastewater. A motor I2 is fixed to the top of the regulating tank 1, and the output end of the motor I2 is connected to a stirring shaft 3, the lower end of which extends into the regulating tank 1. When the dyeing wastewater enters the regulating tank 1, the motor I2 starts, driving the stirring shaft 3 to rotate and stir the wastewater, ensuring uniform composition and preventing excessively high local concentrations from affecting subsequent treatment effects.

[0059] Collection tank I4 is located on one side of regulating tank 1, and water pump I7 is installed on regulating tank 1. The inlet of water pump I7 extends through a pipe to near the bottom of regulating tank 1, and the outlet extends through a pipe to sedimentation tank 5 inside collection tank I4. After the wastewater in regulating tank 1 has been homogenized, water pump I7 starts and pumps the homogenized wastewater to sedimentation tank 5. Water pump I7 can be a small centrifugal pump, and the flow rate is set according to the daily wastewater treatment volume to ensure that the wastewater can be smoothly transported to sedimentation tank 5.

[0060] The collection tank I4 is internally divided into a sedimentation tank 5 and a collection tank 6. Sedimentation tank 5 is located on one side near the regulating tank 1, and collection tank 6 is on the other side. Dosing assembly I8 and dosing assembly II9 are installed on one side of collection tank I4. Dosing assembly I8 is used to add coagulant to sedimentation tank 5, and dosing assembly II9 is ​​used to add coagulant aid. Polyaluminum chloride (PAC) can be used as the coagulant, and polyacrylamide (PAA) can be used as the coagulant aid. The dosage is determined based on the turbidity of the wastewater and the dye concentration. For example, the dosage of PAC is 0.1-0.3% of the wastewater mass, and the dosage of PAA is 0.01-0.03%. After addition, the coagulant and coagulant aid are thoroughly mixed with the wastewater in sedimentation tank 5 to form flocs, which adsorb suspended particles, colloidal substances, and some dye molecules in the wastewater. The flocs gradually settle to the bottom of sedimentation tank 5, and a clear supernatant is formed on the upper layer. A pH meter can also be installed for online pH monitoring, controlling the pH range to 6.5-7.5.

[0061] Multiple support rollers 29 are installed inside the collection pool 6, and the support rollers 29 are evenly arranged along the length of the collection pool 6. The analytical barrel 11 is placed on the support rollers 29 and can rotate. A motor 27 is fixed to one side of the collection box I 4. The output end of the motor 27 is connected to a drive shaft 28. The end of the drive shaft 28 away from the motor 27 extends to the side of the collection box I 4 and is rotatably connected. A drive gear is fixed on the drive shaft 28, and a gear ring that meshes with the drive gear is fixed to the outer wall of the analytical barrel 11. When the motor 27 is started, the drive shaft 28 drives the drive gear to rotate, which drives the analytical barrel 11 to rotate along the support rollers 29 through the gear ring, facilitating the alternating use of the upper and lower collection boxes 42.

[0062] The collection tank 6 contains a support frame 46 and two receiving tanks 42. The two receiving tanks 42 are symmetrically installed on both sides of the support frame 46, and the three together form a cylindrical structure that matches the external shape of the analytical tank 11. Connecting pipes I 44 and II 45 are connected to the two ends of the receiving tanks 42, respectively. The end of connecting pipe I 44 away from the receiving tank 42 extends to the outside of the collection tank I 44, and the end of connecting pipe II 45 away from the receiving tank 42 extends into the inside of the collection tank 6. A water pump II 10 is installed on one side of the collection tank I 4. The inlet of the water pump II 10 extends through a pipe to the upper end of the sedimentation tank 5 inside the collection tank I 4, for extracting the supernatant after sedimentation. The outlet is connected to connecting pipe I 44 through a pipe. When water pump II10 starts, the supernatant enters the container 42 through connecting pipe I44. The container 42 is filled with activated carbon, and the amount of activated carbon is 70-80% of the volume of the container 42. The dye molecules in the supernatant are adsorbed by the activated carbon, and the treated water flows back to the collection tank 6 through connecting pipe II45.

[0063] A desorption assembly is provided on one side of the collection tank 6 for desorbing the saturated activated carbon. The desorption assembly includes an inlet pipe II 30, which is rotatably mounted inside the support frame 46, extending one end to the outside of the collection tank I 4 and sealing the other end. A dosing assembly III 12 is provided on one side of the collection tank I 4. The output end of the dosing assembly III 12 is connected to the outer end of the inlet pipe II 30 via a pipe, for supplying a desorption agent (such as ethanol) to the inlet pipe II 30. Multiple rotating rings 38 are rotatably fitted onto the outer wall of the inlet pipe II 30. Two extension tubes 39 are symmetrically connected to the outer wall of the rotating rings 38. A through hole 52 is provided at the bottom of the inlet pipe II 30, communicating with the extension tube 39 below, allowing the desorption agent in the inlet pipe II 30 to flow into the extension tube 39. Drain holes 50 are provided on both sides of the extension tube 39, through which the desorption agent is evenly sprayed onto the activated carbon in the receiving tank 42, desorbing the adsorbed dye molecules.

[0064] The receiving box 42 contains multiple sets of filter plates 43, each made of stainless steel mesh with a pore size of 0.1-0.2 mm. Adjacent sets of filter plates 43 form chambers, each filled with activated carbon. A rectangular opening 48 is located at the bottom of the receiving box 42, corresponding to the position of each set of filter plates 43. An extension tube 39 passes through the support frame 46 and the side wall of the receiving box 42 (the side wall has insertion holes 49 adapted to the extension tube 39), extending into the rectangular opening 48. Partitions I 40 and II 41 are alternately fixed to the outer walls of the multiple extension tubes 39, located within the rectangular openings 48, creating an S-shaped water flow of the desorbent within the chambers, prolonging the contact time with the activated carbon and improving desorption efficiency. A dividing strip 51 is fixed inside the extension tube 39, dividing the interior of the extension tube 39 into two cavities to prevent direct liquid flow.

[0065] Multiple sealing rings 53 are rotatably fitted on the outer walls of the two receiving boxes 42 and the support frame 46. The sealing rings 53 are made of rubber and are fixedly connected to the inner wall of the collecting box I4 to prevent liquid leakage during the analysis process. A guide pipe 47 is connected to the bottom of the sealing ring 53. The guide pipe 47 is connected to the recovery cavity of the extension pipe 39 and is used to drain the moisture in the activated carbon before analysis.

[0066] Collection tank II13 is located on one side of collection pool 6 and is used to collect the mixture after analysis. A recovery pool I15 is located on one side of collection tank II13, and the two are connected by a pipe to which a water pump III14 is installed. When water pump III14 is started, the mixture in collection tank II13 is pumped to recovery pool I15. In recovery pool I15, the mixture undergoes distillation treatment. The eluent (ethanol) is evaporated and recovered for reuse, and the remaining dye residue can be collected and reused in the dyeing process.

[0067] A recycling pool II17 is also provided on one side of the collection box I4. The recycling pool II17 is connected to the collection box I4 by a pipe, and a water pump IV16 is installed on the pipe. The water inlet of the water pump IV16 extends into the collection pool 6 and is used to draw out the clean water after activated carbon adsorption treatment and pump it to the recycling pool II17 for storage. This clean water can be directly reused in the dyeing process of chemical fiber fabrics.

[0068] Reference Figures 1-7 This device is used for wastewater reuse and dye recovery in the dyeing of chemical fiber fabrics. A first insertion mechanism is provided on one side of the collection tank I4 to control the opening and closing of the connecting pipe I44. The first insertion mechanism includes a fixed base 21, which is fixed to the top of one side of the collection tank I4. An inlet pipe I20 is fixed through one side of the fixed base 21, with its bottom end connected to the drain end of the water pump II10 via a pipe. A sliding pipe I25 is slidably fitted at the other end of the fixed base 21. The outer diameter of the sliding pipe I25 matches the inner diameter of the connecting pipe I44, and a sealing ring is provided at the contact surface. A guide rod 22 is fixed to one side of the fixed base 21, with a sliding frame I23 slidably fitted on its outer wall. The top end of the sliding frame I23 is fixedly fitted onto the outer wall of the sliding pipe I25, and a plug I24 is fixed through its bottom end, matching the connecting pipe I44 below. An electric push rod I26 is fixed to one side of the fixed base 21, with its output end connected to one side of the sliding frame I23. When it is necessary to switch the operation of the container 42, the electric push rod I26 retracts, driving the sliding frame I23 to move along the guide rod 22, so that the sliding tube I25 disengages from the currently connected connecting tube I44. At this time, the analytical barrel 11 can rotate, so that the two container 42s exchange positions. Then, the electric push rod I26 is activated to extend, so that the sliding tube I25 is inserted into another connecting tube I44. At the same time, the plug I24 is inserted into the previous connecting tube I44 to achieve a seal and prevent liquid leakage.

[0069] A second insertion mechanism, similar in structure to the first insertion mechanism, is provided on the other side of the collection box I4. The second insertion mechanism includes a drain pipe I31, which is fixed to the top of the other side of the collection box I4, with its bottom end extending into the collection pool 6. A sliding pipe II32 is slidably fitted onto the other end of the drain pipe I31, and is adapted to a connecting pipe II45. A sliding frame II33 is slidably fitted onto the outer wall of the inlet pipe II30, with the sliding pipe II32 passing through and fixed to the top of the sliding frame II33. A plug II36 is fixed through and fixed to one side of the sliding frame II33, and is adapted to the connecting pipe II45 below. A sliding pipe III35 is fixed through and fixed to the bottom end of the sliding frame II33, with a drain pipe III34 slidably fitted onto the end of the sliding pipe III35 away from the sliding frame II33. The drain pipe III34 passes through and is fixed to one side of the collection box I4, with its other end extending into the collection box II13. An electric actuator II 37 is fixed to one side of the drain pipe I 31, and the output end of the electric actuator II 37 is connected to the sliding frame II 33. When switching the receiving tank 42, the electric actuator II 37 drives the sliding frame II 33 to move, so that the sliding pipe II 32 and the sliding pipe III 35 switch their connection objects respectively. The plug II 36 seals the non-working connecting pipe II 45, ensuring that the analyte flows smoothly into the collection tank II 13.

[0070] Dosing components I8, II9, and III12 have identical structures, all including a reagent tank 18 for storing the corresponding reagents (coagulants, coagulant aids, and dissolving agents). A motor I2 is fixed to the top of the reagent tank 18, and its output is connected to a stirring shaft 3, which extends into the tank 18 to agitate the reagents and ensure uniform concentration. A water pump V19 is fixed to one side of the tank 18. The inlet of pump V19 extends through a pipe to the bottom of the tank 18, and its outlet extends through pipes to a collection tank I4 (dosing components I8 and II9) or is connected to an inlet pipe II30 (dosing component III12). Pump V19 can be a micro metering pump to precisely control the reagent dosage according to treatment requirements, ensuring stable treatment results.

[0071] Working principle: The dyeing wastewater is first discharged into the equalization tank 1. The motor I2 at the top of the equalization tank 1 is started, driving the stirring shaft 3 to rotate at a speed of 60-80 rpm for 30-60 minutes. During the stirring process, the dye particles, auxiliaries and other components in the wastewater are fully mixed, avoiding excessively high local concentrations that could lead to an imbalance in the addition of subsequent treatment agents, and providing homogenized influent conditions for the subsequent sedimentation process.

[0072] The homogenized wastewater is pumped to sedimentation tank 5 in collection tank I4 via pump I7. At this time, dosing components I8 and II9 are started simultaneously. Pump V19 in dosing component I8 pumps polyaluminum chloride (10-15% concentration) stirred by stirring shaft 3 in tank 18 into sedimentation tank 5 at a ratio of 0.1-0.3% of the wastewater mass. Dosing component II9 adds polyacrylamide solution (0.1-0.3% concentration) at a ratio of 0.01-0.03%. The coagulant polyaluminum chloride hydrolyzes in the water to form positively charged colloids, which adsorb negatively charged dye particles and suspended impurities in the wastewater. The coagulant polyacrylamide, through bridging, causes the colloidal particles to aggregate into large flocs. Under gravity, the flocs settle at the bottom of sedimentation tank 5 at a settling velocity of 0.8-1.2 m / h.

[0073] Pump II10 is started to pressurize the supernatant in sedimentation tank 5 (head 3-5m) and send it into connecting pipe I44. The liquid enters the receiving tank 42 through connecting pipe I44. The activated carbon (particle size 0.8-1.2mm) filled in the receiving tank 42 forms a porous adsorption layer. When the supernatant flows through the activated carbon at a flow rate of 10-15m / h, dye molecules are adsorbed onto the surface of the activated carbon by van der Waals forces and electrostatic attraction. The purified water after adsorption treatment flows back to the collection tank 6 through connecting pipe II45. During the flow of the supernatant in the receiving tank 42, it flows through baffles I40 and II41, forming an S-shaped flow, which prolongs the contact time with the activated carbon and improves the desorption efficiency.

[0074] When the activated carbon in a set of containment tanks 42 becomes saturated (as determined by monitoring the effluent color, when the color is ≥30 times), containment tank 42 is switched, and the first and second insertion mechanisms operate in conjunction. The electric push rod I26 retracts, causing the sliding frame I23 to slide along the guide rod 22, so that the sliding tube I25 is pulled out from the currently connected connecting tube I44, and at the same time, the plug I24 is pulled out from the port of the lower connecting tube I44; simultaneously, the electric push rod II37 pushes the sliding frame II33 to move, the sliding tube II32 disengages from the currently connected tube II45, the plug II36 disengages from the lower connecting tube II45, and the sliding tube III35 disengages from the corresponding guide tube 47.

[0075] When motor II 27 starts, drive shaft 28 drives the active gear to rotate, which in turn drives the analytical barrel 11 to rotate along support roller 29 via gear ring, facilitating the alternating use of the upper and lower containment boxes 42. This allows the saturated activated carbon to move to the lower position. After the conversion, the residual liquid in the upper containment box 42 can enter the extension pipe 39 through the drain hole 50 on the extension pipe 39 and be discharged into the collection tank 6 through the guide pipe 47. After complete emptying, the electric push rod I 26 extends and drives the sliding frame I 23 to slide along the guide rod 22, so that the sliding tube I 25 is inserted into the converted connecting tube I 44. At the same time, the plug I 24 is inserted into the port of the lower connecting tube I 44. Simultaneously, the electric push rod II 37 pushes the sliding frame II 33 to move, the sliding tube II 32 is inserted into the converted connecting tube II 45, the plug II 36 is inserted into the lower connecting tube II 45, and the sliding tube III 35 is inserted into the corresponding guide pipe 47.

[0076] The desorption unit starts operating, and pump V19 of dosing component III12 pumps ethanol (90-95% concentration) from tank 18 into inlet pipe II30. The ethanol enters extension pipe 39 through through hole 52 at the bottom of inlet pipe II30. Drain holes 50 on both sides of extension pipe 39 evenly spray ethanol onto the activated carbon layer in container 42. Ethanol, as a desorption agent, can break the adsorption bonds between dye and activated carbon, causing dye molecules to detach from the activated carbon surface. Separator 51 inside extension pipe 39 divides the cavity into two independent channels, simultaneously delivering fresh ethanol from both sides. The desorbed mixture is collected through guide pipe 47 and discharged, finally flowing into collection tank II13.

[0077] The dye-ethanol mixture in collection tank II13 is pumped to recovery tank I15 by water pump III14. It is heated to 78-80℃ via an external distillation device. After evaporation, the ethanol is recovered by condensation and reused as a desorption agent. The remaining concentrated dye solution can be directly used in the dyeing process. The purified water in collection tank 6, after deep treatment with activated carbon, is pumped to recovery tank II17 by water pump IV16. After simple pH adjustment (6-8), it is reused in the pre-dyeing treatment or washing process, achieving wastewater resource utilization.

[0078] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A device for reuse of wastewater and recovery of dyes for dyeing of synthetic fabric, characterized in that, Including: The adjusting and storing tank (1); the collecting box I (4) is provided with the adjusting and storing tank (1) one side, the collecting box I (4) is provided with the sedimentation tank (5) and the collecting tank (6) in;Water pump I (7) is provided in the adjusting and storing tank (1), the water inlet end of water pump I (7) is connected to the adjusting and storing tank (1) by pipeline, the water outlet end is connected to the sedimentation tank (5) by pipeline;The dosing assembly I (8) and dosing assembly II (9) are provided in the collecting box I (4) one side, respectively for adding coagulant and coagulant aid to the sedimentation tank (5);The analysis bucket (11) is rotatably provided in the collecting tank (6), the analysis bucket (11) includes support frame (46) and two for containing active carbon containing box (42), the both ends of containing box (42) are connected with connecting pipe I (44) and connecting pipe II (45) respectively, the connecting pipe II (45) extends to the collecting tank (6);Water pump II (10) is provided in the collecting box I (4) one side, the water inlet end of water pump II (10) is connected to the collecting box I (4) by pipeline, the water outlet end is connected to the connecting pipe I (44) by pipeline;The analysis assembly is provided in the collecting tank (6) one side, for flushing saturated active carbon to resolve dye;The analysis assembly includes the liquid inlet pipe II (30) that is rotatably arranged in the support frame (46), one side of the collecting box I (4) is equipped with dosing assembly III (12), dosing assembly III (12) is connected with one end of the liquid inlet pipe II (30), the other end of the liquid inlet pipe II (30) is sealed, the outer wall of the liquid inlet pipe II (30) rotatably sets up a plurality of rotating rings (38), the outer wall of the rotating ring (38) is connected with two symmetrically arranged extension pipes (39), the bottom of the liquid inlet pipe II (30) is provided with the through hole (52) that is connected with the extension pipe (39) below, the both sides of the extension pipe (39) are provided with drain hole (50);The containing box (42) is fixedly provided with a plurality of filter plates (43), the cavity for containing active carbon is formed between the two groups of adjacent filter plates (43), the bottom of the containing box (42) is provided with the rectangular port (48) corresponding to each group of filter plates (43), the extension pipe (39) penetrates the support frame (46) and the containing box (42) and extends into the rectangular port (48);It also includes a plurality of baffle I (40) and baffle II (41), the baffle I (40) and the baffle II (41) are alternately fixed in the outer wall of the extension pipe (39) respectively and located in the corresponding rectangular port (48), the outer wall of the containing box (42) is provided with the jack (49) that is inserted with the extension pipe (39);Collecting box II (13) is provided in the collecting tank (6) one side, for collecting the dye liquid that resolves out;The recovery tank I (15) is provided in the collecting box II (13) one side;Water pump III (14) is arranged between the collecting box II (13) and the recovery tank I (15).A recovery pool II (17) is arranged at one side of the collecting tank I (4); a water pump IV (16) is arranged between the recovery pool II (17) and the collecting tank I (4), and the water inlet end of the water pump IV (16) is connected to the collecting pool (6).

2. The device for recycling wastewater and recovering dye for dyeing chemical fiber fabrics according to claim 1, characterized in that, Two said containing box (42) and the support frame (46) into a cylindrical, the collection pool (6) is fixedly provided with a plurality of support rollers (29), the analysis bucket (11) is arranged on the plurality of support rollers (29), one side of the collection box I (4) is fixedly provided with motor II (27), one side of the collection box I (4) is rotatably provided with drive shaft (28), one end of the drive shaft (28) is fixedly connected with the output end of the motor II (27), the drive shaft (28) is drivenly connected with the analysis bucket (11) through gear and gear ring.

3. The device for recycling wastewater and recovering dye for dyeing chemical fiber fabrics according to claim 1, characterized in that, The extension pipe (39) is fixedly provided with a partition strip (51), the partition strip (51) divides the extension pipe (39) into two cavities, the outer wall of two said containing box (42) and the support frame (46) rotatably sleeved with a plurality of sealing rings (53), the sealing ring (53) is fixedly connected with the collection box I (4), and the through hole (52) is corresponding with the insertion hole (49) which is consistent with up and down, the bottom of a plurality of sealing rings (53) is fixedly provided with a flow guide pipe (47), the flow guide pipe (47) is communicated with a plurality of extension pipes (39) below.

4. The device for recycling wastewater and recovering dye for dyeing chemical fiber fabrics according to claim 1, characterized in that, Also including a first plug-in mechanism, the first plug-in mechanism includes a fixed seat (21) fixedly arranged on one side of the top of the collection box I (4), a liquid inlet pipe I (20) is fixedly arranged on one side of the fixed seat (21), the bottom end of the liquid inlet pipe I (20) is connected with the drain end of the water pump II (10), the other end of the liquid inlet pipe I (20) is slidably provided with a sliding pipe I (25), the outer diameter of the sliding pipe I (25) is matched with the inner diameter of the connecting pipe I (44), a guide rod (22) is fixedly arranged on one side of the fixed seat (21), a sliding frame I (23) is slidably sleeved on the outer wall of the guide rod (22), the top end of the sliding frame I (23) is fixedly sleeved on the outer wall of the sliding pipe I (25), the bottom end is fixedly provided with a plug I (24) plugged into the connecting pipe I (44) below, an electric push rod I (26) is fixedly arranged on one side of the fixed seat (21), and the output end of the electric push rod I (26) is fixedly connected with one side of the sliding frame I (23).

5. The device for recycling wastewater and recovering dye for dyeing chemical fiber fabrics according to claim 3, characterized in that, The second plug-in mechanism includes a drainage pipe I (31) fixed on the other side of the top of the collection tank I (4), the bottom end of the drainage pipe I (31) extends into the collection tank (6), the other end of the drainage pipe I (31) is slidably provided with a sliding pipe II (32), the other end of the sliding pipe II (32) is plugged with the connecting pipe II (45), the outer wall of the liquid inlet pipe II (30) is slidably provided with a sliding frame II (33), the sliding pipe II (32) penetrates and is fixed on the top of the sliding frame II (33), one side of the sliding frame II (33) is penetrates and fixed with a plug II (36) plugged with the connecting pipe II (45) below, the bottom end of the sliding frame II (33) penetrates and is fixed with a sliding pipe III (35) plugged with the flow guide pipe (47), the other end of the sliding pipe III (35) is slidably provided with a drainage pipe III (34), the drainage pipe III (34) penetrates and is fixed on one side of the collection tank I (4), the other end of the drainage pipe III (34) extends into the collection tank II (13), one side of the drainage pipe I (31) is fixed with an electric push rod II (37), the output end of the electric push rod II (37) is fixedly connected with the sliding frame II (33).

6. The device for recycling wastewater and recovering dye for dyeing chemical fiber fabrics according to claim 5, characterized in that, The medicine feeding assembly I (8), the medicine feeding assembly II (9) and the medicine feeding assembly III (12) all include a medicine tank (18), the medicine tank (18) and the top of the storage tank (1) are both fixedly provided with a motor I (2), the output end of the motor I (2) is fixedly provided with a stirring shaft (3), one side of the medicine tank (18) is fixedly provided with a water pump V (19), the water inlet end of the water pump V (19) is connected to the medicine tank (18) through a pipeline, the water outlet ends of the three water pumps V (19) are respectively connected to the collection tank I (4) and the liquid inlet pipe II (30) through a pipeline.

7. The device for recycling wastewater and recovering dye for dyeing synthetic fabric according to claim 3, characterized in that, The flow guide pipe (47) is used to discharge the moisture in the activated carbon before sealing, and is used to discharge the ethanol mixed solution after desorption, so as to avoid mixing of the filtered clean water and ethanol.

8. A method for wastewater reuse and dye recovery for dyeing of synthetic fabric, characterized in that, The wastewater recycling and dye recovery device for dyeing chemical fabric includes the following steps: S1, input the dyeing wastewater into the storage tank (1) for homogeneous stirring; S2, use the water pump I (7) to pump the homogeneous wastewater to the sedimentation tank (5), add coagulant and coagulant aid for precipitation, and form supernatant; S3, use the water pump II (10) to pump the supernatant into the containing box (42), and use activated carbon to adsorb dyes; S4, when the activated carbon is saturated, rotate the desorption barrel (11) to switch the containing box (42), and use the desorption assembly to desorb the saturated activated carbon to recover dyes; S5, collect the desorption liquid into the collection tank II (13), and use the water pump III (14) to pump it to the recovery tank I (15) for dye recovery. S6, the treated clean water in the collection tank (6) is pumped to the recovery tank II (17) by the water pump IV (16) for recycling; Wherein, two groups of the containing box (42) work alternately, realizing continuous treatment.

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