Dye decoloring treatment device for cellulosic fiber yarns and fabrics

Abstract

The invention relates to the technical field of textile fiber decoloration, in particular to a cellulosic fiber yarn and fabric dye decoloration treatment device. The system comprises a decolorizing system and a cleaning system, the decolorizing system is used for extracting and separating dye on the cellulosic fiber yarn or fabric, the cleaning system is used for cleaning the decolorized cellulosic fiber yarn or fabric, and the decolorizing system and the cleaning system are connected with a filtering system. The filtering system is used for filtering insoluble impurities in a decolorizing solvent or a cleaning solution, and the filtering system is connected with a recovery system. The soaking pool and the spraying pool in the decolorizing system are combined, cellulose fiber yarn or fabric can be fully soaked and washed, dye on the surface and in the cellulose fiber yarn or fabric can be effectively extracted and separated, efficient decolorizing is achieved, the recovery system efficiently recovers decolorizing solvent and dye through distillation, condensation, separation and efficient recovery, solvent consumption is reduced, cost is saved, meanwhile, dye emission is reduced, and environmental protection is achieved. And energy is saved.

Description

Technical Field

[0001] The invention relates to the technical field of textile fiber decolorization, in particular to a cellulose fiber yarn and fabric dye decolorization treatment device. Background Art

[0002] Cellulose fiber yarns and fabrics are widely used in the textile industry due to their excellent moisture absorption and comfort. In order to improve the aesthetics and market competitiveness of the fabrics, the dyeing process is crucial in the production of cellulose fiber products. Commonly used dye types include reactive dyes, direct dyes, sulphur dyes, vat dyes, etc. In the process of textile production, processing and recycling, the dyed fabrics often need to be decolorized. The main reasons include: when the dyeing effect is not ideal (such as color difference, color spots), decolorization and re-dyeing are required; the original dyes need to be removed before recycling regenerated fibers or fabrics; some dye residues affect subsequent processing or recycling; such as local decolorization before printing to improve the adaptability of subsequent processes.

[0003] There are many methods for fabric decolorization, common methods include redox method, reducing agent decolorization method and organic solvent decolorization method. Organic solvents are represented by organic solvents such as N,N-dimethylformamide (DMF), which can efficiently dissolve or disperse a variety of dye molecules. DMF has extremely strong dissolving ability and can effectively destroy the physical or chemical bond between the dye and cellulose, causing the dye molecules to dissociate and dissolve in the solvent to achieve the decolorization effect. This method has a fast decolorization speed, a wide range of adaptability, and less damage to the cellulose fiber itself. It is suitable for the decolorization and rework of high-end textiles.

[0004] When using organic solvents such as DMF for decolorization, a large amount of waste solvents containing dyes will be generated. If the decolorizer cannot be effectively recovered, it will cause economic losses, environmental pollution and legal risks. DMF is relatively expensive. If large amounts of consumption are not recycled, the production cost will increase significantly. If the DMF waste liquid containing dyes is directly discharged, it will cause serious pollution to water bodies, soil and organisms. DMF itself is a toxic organic matter. Long-term discharge harms the ecological environment and human health. Organic solvents such as DMF are hazardous chemicals. If the waste liquid is not managed properly, it is easy to cause risks such as production safety and legal compliance. Summary of the Invention

[0005] In order to solve the problem of recycling organic solvents such as DMF after being used as decolorizing agents, the present invention provides a cellulose fiber yarn and fabric dye decolorizing treatment device.

[0006] The present invention provides a cellulose fiber yarn and fabric dye decolorization device using the following technical solutions: A cellulose fiber yarn and fabric dye decolorization treatment device comprises a decolorization system and a cleaning system. The decolorization system is used to extract and separate the dye on the cellulose fiber yarn or fabric, and the cleaning system is used to clean the cellulose fiber yarn or fabric after decolorization. The decolorization system and the cleaning system are connected to a filtering system, and the filtering system is used to filter insoluble impurities in the decolorization solvent or the cleaning liquid. The filtering system is connected to a recovery system, and the recovery system is used to separate and recover the decolorization solvent and the dye, and reuse the decolorization solvent and the dye.

[0007] It is equipped with a cleaning system to fully clean the cellulose fiber yarn or fabric after decolorization, effectively remove residual solvents and impurities, prevent secondary pollution, and ensure the quality, safety and environmental performance of subsequent processes or products. The decolorization system and the cleaning system are both connected to the filtration system, which can effectively filter out insoluble impurities in the solvent or cleaning liquid to prevent impurities from entering the subsequent links. A recovery system is set after the filtration system, which can efficiently separate and recycle the decolorization solvent and dye. This device greatly reduces the emission of organic solvents and harmful waste liquids by recycling and reusing the decolorization solvent and dye, and effectively reduces pollution to the environment. This device is suitable for the decolorization treatment of various cellulose fiber yarns and fabrics, can adapt to different dye types and decolorization requirements, has flexible technology and strong applicability.

[0008] Furthermore, the decolorization system includes a soaking tank, which has a water inlet at one end and a drain at the other end. The soaking tank is connected to an external cleaning liquid supply system through the water inlet, and is connected to a filtration system and a recovery system through the drain.

[0009] The soaking tank is connected to the cleaning liquid supply system through the water inlet, which can continuously and stably supply fresh cleaning liquid or decolorizing solvent. The soaking tank is connected to the filtration system and the recovery system through the drain port, which can discharge the waste liquid containing dye in time and filter and recycle it to avoid the waste liquid being retained in the soaking tank and causing dye redeposition. The soaking tank is closely connected with the cleaning liquid supply system, filtration system and recovery system, realizing the automatic supply of solution and automatic discharge and treatment of waste liquid.

[0010] Furthermore, the soaking pool is connected to a spray pipe, and the soaking pool is connected to an external decolorization solvent supply system through the spray pipe. The end of the spray pipe is connected to a spray head, and the spray head is installed above the soaking pool and arranged toward the soaking pool. The spray head is slidably arranged by a slide rail.

[0011] A spray pipe is set above the immersion tank, and the cellulose fiber yarn or fabric in the tank is evenly sprayed through the spray head, so that the decolorization solvent can fully cover and penetrate into the surface and interior of the yarn or fabric, effectively improving the separation and extraction efficiency of the dye, and significantly enhancing the uniformity and thoroughness of the decolorization. The spray head is set by sliding on a slide rail to achieve fixed-point or full-coverage spraying, enhancing the applicability and flexibility of the device.

[0012] Furthermore, a stirring roller is swingably installed in the soaking tank, and the stirring roller is swingably installed in the soaking tank through a stirring frame, and the stirring frame is transmission-connected to the stirring motor.

[0013] The stirring roller installed in the soaking tank is swung by the stirring frame, which can achieve continuous turning and uniform stirring of the cellulose fiber yarn or fabric, promote the full contact between the decolorization solvent and the material to be treated, improve the dye dissolution and removal efficiency, and significantly improve the uniformity and thoroughness of the decolorization effect. The swinging stirring action of the stirring roller effectively prevents the accumulation and entanglement of fibers or fabrics in the soaking tank, and avoids the local deposition of dyes and impurities.

[0014] Furthermore, the cleaning system includes a cleaning impeller, which is rotatably mounted at the bottom of the soaking tank and is connected to a cleaning motor through transmission.

[0015] The mechanical stirring force generated by the rotation of the cleaning impeller effectively promotes the turning and scrubbing of the fabric after bleaching, significantly improving the removal effect of solvents and impurities on the fabric surface, ensuring the cleanliness of the fabric. Through continuous water flushing and mechanical action, the cleaning impeller helps to reduce the residual bleaching solvent, dye fragments and impurity content in the fabric, thereby improving the safety of subsequent processes and product quality.

[0016] Furthermore, a rolling roller is provided on one side of the soaking pool, and the rolling roller consists of two groups of rollers that are tightly pressed and squeezed against each other. A conveying roller is arranged on the side of the rolling roller facing the soaking pool, and a support net is provided on the bottom side of the rolling roller and the conveying roller.

[0017] The pressing rollers, which are composed of two groups of rollers that are tightly pressed against each other and squeezed, can apply uniform pressure to the soaked fabric, effectively squeeze out the residual solvent and moisture inside the fabric, and promote the dehydration of the fabric. The conveying rollers arranged on the side of the pressing roller facing the soaking tank work in conjunction with the pressing rollers to achieve smooth transportation of the fabric from the soaking tank to subsequent processes. The squeezed fabric can better discharge residual solvents and impurities, and cooperate with the mechanical action of the cleaning impeller to improve the overall thoroughness and uniformity of the cleaning of the bleached fabric.

[0018] Furthermore, the filtration system includes a coarse filter, a fine filter and a sedimentation tank, and the decolorizing solvent or cleaning liquid from the soaking tank passes through the coarse filter and the fine filter in sequence and flows into the sedimentation tank.

[0019] A coarse filter is used to initially intercept larger particles of impurities, and a fine filter is used to further remove fine impurities, effectively ensuring the cleanliness of the filtered liquid and reducing the impact of impurities on subsequent equipment. Multi-stage filtration effectively prevents impurities from entering pumps, pipes and other precision equipment, reducing mechanical wear and blockage risks. By effectively filtering impurities and suspended matter, the decolorization solvent and cleaning liquid are purified, and multiple recycling of the liquid is achieved, reducing the consumption of solvents and cleaning liquids and saving production costs.

[0020] Furthermore, a drainage trough is provided at the bottom of the soaking tank, the coarse filter is installed in the drainage trough, the fine filter is installed in the pipe connecting the soaking tank and the sedimentation tank, and an observation port is provided at the pipe where the fine filter is installed, and the observation port is blocked by a transparent plate. A partition plate is provided in the sedimentation tank, and the partition plate divides the interior of the sedimentation tank into a front area and a rear area. The soaking tank is connected to the front area of the sedimentation tank through a pipe.

[0021] The coarse filter is directly installed in the drainage trough at the bottom of the immersion tank to intercept large particles of impurities at the first time to prevent them from entering subsequent pipes and equipment, reducing the risk of equipment blockage. The fine filter is set in the connecting pipe between the immersion tank and the sedimentation tank to further filter fine suspended matter to ensure that the liquid entering the sedimentation tank is cleaner. An observation port is set at the fine filter of the pipeline. The user can observe the status of the filter in real time through the transparent plate, which is convenient for timely detection of blockage or pollution. The partition plate in the sedimentation tank divides the tank body into the front area and the rear area. The front area is used to store a small amount of decolorization solvent to reduce the diffusion of the decolorization solvent in the sedimentation tank and facilitate cleaning.

[0022] Furthermore, the recovery system includes a distillation tower and a condenser. The distillation tower is connected to the filtration system and extracts the decolorization solvent filtered by the filtration system. The condenser is connected to the distillation tower and cools the decolorization solvent evaporated by the distillation tower.

[0023] After the filtration system initially purifies the decolorization solvent, it is further purified through a distillation tower to separate impurities, low-boiling point components, and high-boiling point components in the solvent to obtain a high-purity decolorization solvent. The condenser efficiently cools the steam produced by the distillation tower into a recyclable liquid, allowing the solvent to be recycled multiple times, reducing the consumption of new solvent and significantly lowering production and operating costs. The system effectively recovers and reuses the decolorization solvent, reduces the emission of harmful substances such as organic solvents, reduces the risk of environmental pollution, enhances the company's environmental image, and contributes to sustainable development.

[0024] Furthermore, the distillation tower is connected to the filtration system through a water pump, an evaporation port and a discharge port are provided on the distillation tower, the distillation tower is connected to the condenser through the evaporation port, and the condenser is connected to a collection tank.

[0025] The distillation tower is connected to the filtration system through a pumping pipe, which can stably and continuously transport the filtered decolorization solvent to the distillation tower, realizing continuous feeding and ensuring the continuity and stability of the distillation process. The evaporation port is directly connected to the condenser. The steam enters the condenser through the evaporation port and is rapidly cooled, maximizing the recovery of solvent and improving material utilization. The liquid solvent after cooling in the condenser flows into the collection tank for centralized storage and subsequent transportation.

[0026] In summary, the present invention has the following beneficial technical effects: 1. The immersion tank and spray combination in the decolorization system can fully soak and rinse the cellulose fiber yarn or fabric, effectively extract and separate the dyes on the surface and inside, and achieve efficient decolorization.

[0027] 2. The decolorization, cleaning, filtration, recovery and other systems are organically connected in series through pipelines and devices, and continuous operation is carried out to improve production efficiency.

[0028] 3. The filtration system is equipped with coarse and fine filter screens and sedimentation tanks to remove insoluble impurities in the decolorization solvent or cleaning liquid at multiple stages to ensure the reliability of the subsequent recovery system and the purity of the solvent.

[0029] 4. The recovery system separates and efficiently recovers decolorization solvent and dye through distillation and condensation, reducing solvent consumption and saving costs, while reducing dye emissions and being environmentally friendly and energy-saving.

[0030] 5. The stirring roller and the spray device in the immersion tank work together to strengthen the contact between the yarn and fabric and the decolorization solvent, thereby improving the uniformity and thoroughness of decolorization.

[0031] 6. The cleaning system uses impeller agitation, combined with rollers and conveyor rollers to effectively remove residual bleaching liquid and impurities, ensuring the cleanliness of yarn or fabric and improving product quality.

[0032] 7. The functional components are highly integrated, the pipelines and devices are reasonably laid out, and the floor space is small, making it convenient for operators to manage, maintain and monitor the equipment daily.

[0033] 8. A transparent observation port is provided at the fine filter to facilitate real-time monitoring of the filtering effect and impurity blockage, timely maintenance, and ensure stable operation of the system.

[0034] 9. The recovery system adopts a closed loop to reduce solvent volatilization and leakage of harmful gases, thereby reducing harm to operators and the environment.

[0035] 10. The device parameters can be flexibly adjusted according to different yarns, fabrics and dye types, with a wide range of applications to meet diverse decolorization and cleaning needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a schematic diagram of the structure of the present invention from a first viewing angle; Figure 2 This is a schematic diagram of the structure of the present invention from a second viewing angle; Figure 3 This is a schematic structural diagram of the present invention from a third viewing angle; Figure 4 It is a top view schematic diagram of the present invention; Figure 5 for Figure 4 Schematic diagram of the full cross-section structure at AA.

[0037] Description of reference numerals: 1. Decolorization system, 11. Soaking tank, 111. Water inlet, 112. Drain outlet, 12. Spray pipe, 121. Spray head, 122. Slide rail, 13. Stirring roller, 131. Stirring frame, 132. Stirring motor; 2. Cleaning system, 21. Cleaning impeller, 211. Cleaning motor, 22. Pressing roller, 221. Conveyor roller, 222. Support net; 3. Filtration system, 31. Coarse filter, 311. Drain trough, 32. Fine filter, 321. Observation port, 33. Sedimentation tank, 331. Separator; 4. Recovery system, 41. Distillation tower, 411. Pumping pipe, 412. Evaporation port, 413. Discharge port, 42. Condenser, 421. Collection tank. DETAILED DESCRIPTION

[0038] The following will be combined with the Figure 1-Figure 5 The technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0039] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" and the like to indicate orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0040] Dimethylformamide (DMF) is a polar organic solvent with the chemical formula HCON(CH3)2. It has good solubility and can dissolve a variety of organic and inorganic substances. It is often used in synthesis, extraction, solvent and other fields.

[0041] DMF is a polar solvent with strong hydrogen bond acceptor ability. It can dissolve a variety of dye molecules. Many dyes have high solubility in DMF and can be dissolved from solid mixtures or liquid phases to achieve the purpose of decolorization. Under certain conditions, DMF not only acts as a solvent, but also participates in chemical reactions. For example, under heating or alkaline conditions, DMF can cause the dye molecular structure to break or transform, thereby reducing its color intensity. DMF can be used as a reaction medium in combination with oxidants (such as hydrogen peroxide) or reducing agents (such as sulfites) to promote the redox reaction of dye molecules, destroy their conjugated systems, and achieve decolorization effects. In wastewater or dyeing liquid treatment, DMF can be used as an extractant to transfer dyes from the aqueous phase to the organic phase, thereby achieving aqueous phase decolorization.

[0042] Direct dissolution decolorization method: add dye-containing substances (such as dyed fibers, waste liquid) into DMF, dissolve the dye in DMF by stirring and heating, filter or separate the solid and liquid, and take out the decolorized substance. This method is suitable for situations where the dye has weak binding force with the fiber and the dye is easily soluble.

[0043] DMF is combined with an oxidant for decolorization. An appropriate amount of oxidant (such as H2O2) is added to the DMF solvent and heated to react, so that the dye molecules are oxidized and their conjugated structures are destroyed. This method is suitable for situations where the dye molecular structure is stable and simple dissolution is difficult to decolorize.

[0044] DMF solvent extraction method, dye wastewater is fully mixed with DMF, through phase separation, the dye is transferred to the DMF phase, the DMF phase is separated, the dye is recovered or further processed, this method is suitable for wastewater treatment and dye recovery.

[0045] DMF is used in combination with a reducing agent for decolorization. DMF is used as a medium and a reducing agent such as sulfite is added to reduce the chromogenic group of the dye and reduce its color. It is generally used for the decolorization of reduced dyes.

[0046] DMF is toxic and volatile to a certain extent and needs to be used in a well-ventilated area. Waste liquid recovery and treatment must comply with environmental protection requirements. Different dyes have large differences in their solubility and reaction properties with DMF, requiring specific experimental optimization conditions.

[0047] Basic Example: The embodiment of the present invention discloses a cellulose fiber yarn and fabric dye decolorization treatment device, referring to Figure 1 , comprising a decolorization system 1 and a cleaning system 2, wherein the decolorization system 1 is used to extract and separate dyes on cellulose fiber yarns or fabrics, and the cleaning system 2 is used to clean the cellulose fiber yarns or fabrics after decolorization; The decolorization system 1 and the cleaning system 2 are connected to a filtration system 3, and the filtration system 3 is used to filter insoluble impurities in the decolorization solvent or the cleaning liquid. The filtration system 3 is connected to a recovery system 4, and the recovery system 4 is used to separate and recover the decolorization solvent and the dye, and reuse the decolorization solvent and the dye.

[0048] According to the process flow, install the decolorization system 1, cleaning system 2, filtration system 3 and recovery system 4 in sequence, ensure that the pipes and valves between the systems are firmly connected and well sealed, connect the electrical control parts of each system to the main console, ensure safe grounding, check the working status of all sensors, valves, pumps and heaters, install the filter unit in the decolorization and cleaning liquid channels, ensure that it is removable and easy to clean and replace, connect the recovery device to the outlet of the filtration system, separate the solvent and dye recovery pipelines for subsequent reuse, add reagents and solvents, perform system pressure, sealing and flow tests, confirm that there are no leaks and blockages, and ensure that the functional modules work together normally.

[0049] Check whether each system is well sealed and the filter is clean, prepare an appropriate amount of decolorization solvent, and inject it into the decolorization system storage tank, and load the cellulose fiber yarn or fabric to be decolorized into the decolorization chamber.

[0050] Start the decolorization system 1, pump the decolorization solvent into the system, and fully contact it with the cellulose fibers. Accelerate the dissolution of the dye through auxiliary methods such as stirring, heating or ultrasound. Set the decolorization time and temperature according to process requirements. After the decolorization is completed, discharge the decolorized liquid into the filtration system 3.

[0051] The filtration system 3 performs solid-liquid separation on the decolorized liquid and intercepts insoluble impurities. The decolorized liquid after filtration enters the recovery system 4, where the solvent and dye are separated and recovered through methods such as distillation and membrane separation. The recovered solvent can be returned to the decolorization system for recycling, and the dye can be centrally processed or recovered for reuse.

[0052] The bleached yarn or fabric is transferred to the cleaning system 2, the cleaning liquid is injected, and the cleaning cycle is started to completely remove the residual bleaching agent and impurities.

[0053] After thorough cleaning, the yarn or fabric is collected after dehydration and drying and enters the subsequent finishing or inspection process.

[0054] Reference Figure 1 and Figure 5 The decolorization system 1 includes a soaking tank 11, one end of the soaking tank 11 is provided with a water inlet 111, and the other end is provided with a drain outlet 112. The soaking tank 11 is connected to an external cleaning liquid supply system through the water inlet 111, and the soaking tank 11 is connected to the filtration system 3 and the recovery system 4 through the drain outlet 112.

[0055] Reference Figure 1 and Figure 3 The soaking pool 11 is connected to a spray pipe 12, and the soaking pool 11 is connected to an external decolorization solvent supply system through the spray pipe 12. The end of the spray pipe 12 is connected to a spray head 121. The spray head 121 is installed above the soaking pool 11 and is set toward the soaking pool 11. The spray head 121 is slidably set by a slide rail 122.

[0056] Reference Figure 1 、 Figure 4 and Figure 5 A stirring roller 13 is swingably installed in the soaking tank 11 . The stirring roller 13 is swingably installed in the soaking tank 11 through a stirring frame 131 . The stirring frame 131 is transmission-connected to a stirring motor 132 .

[0057] Place the soaking tank 11 horizontally on the designated work surface or foundation to ensure its stability. Connect the water inlet 111 to the cleaning liquid supply system pipeline, and install a sealing ring at the interface to prevent leakage. Use a corrosion-resistant hose to connect the drain outlet 112 to the filtration system 3 and the recovery system 4. The interface must be tightened and treated for anti-seepage.

[0058] The spray pipe 12 is installed on the top of the soaking tank 11 through a fixed bracket, and the spray head 121 is installed at the end of the spray pipe 12 and faces the inside of the soaking tank 11. The spray head 121 is installed through a slide rail 122 to ensure that it can slide along the length of the soaking tank and lock in different positions to adapt to the spraying needs of different yarn or fabric stacking areas. The spray pipe 12 is connected to the decolorization solvent supply system, and a check valve is installed at the interface.

[0059] The stirring roller 13 is swingably installed inside the immersion tank 11 through the stirring frame 131, and its two ends are hinged to the stirring frame 131. The stirring frame 131 is connected to the stirring motor 132 outside the immersion tank through a transmission shaft. The motor is installed on the side of the immersion tank and is well protected and grounded. Check the running channel of the stirring roller 13 to ensure that it does not interfere with the tank wall, sprinkler head and other components when swinging or rotating.

[0060] After completing all mechanical and electrical connections, conduct water and power tests on the system, check the working status of the pump, spraying, stirring, filtering and recovery links to ensure there is no leakage or stagnation.

[0061] Check whether the soaking tank, spray system and stirring mechanism are clean and free of foreign matter, and evenly spread the cellulose fiber yarn or fabric to be treated in the soaking tank 11. If necessary, hang them in layers to avoid agglomeration.

[0062] Start the spray system and spray the decolorizing solvent evenly onto the surface of the yarn or fabric through the spray pipe 12 and the spray head 121. Slide the spray head 121 to ensure that the entire pool area is covered. Simultaneously open the water inlet 111 and inject an appropriate amount of cleaning liquid according to process requirements to achieve composite decolorization with the solvent.

[0063] Start the stirring motor 132, drive the stirring frame 131 to drive the stirring roller 13 to swing in the soaking tank, enhance the full contact between the yarn or fabric and the decolorization solvent and cleaning liquid, and improve the decolorization efficiency. The stirring speed and method can be set according to the fiber type and dye type to prevent damage to the fiber.

[0064] Maintain spraying, stirring and soaking for a period of 30 to 60 minutes. During this period, the spray head 121 can be slid multiple times to adjust the spray area. After the decolorization is completed, open the drain port 112 and introduce the decolorized liquid into the filtration system 3 to filter out insoluble impurities.

[0065] Adjust the spray flow, stirring speed, bleaching time and temperature according to the type of fiber and dye to avoid damage to the fiber. The solvent and cleaning liquid should not be recycled too many times to prevent performance degradation.

[0066] Reference Figure 2 and Figure 5 The cleaning system 2 includes a cleaning impeller 21 , which is rotatably mounted at the bottom of the soaking tank 11 and is connected to a cleaning motor 211 .

[0067] Reference Figure 1-Figure 5 A rolling roller 22 is provided on one side of the immersion pool 11. The rolling roller 22 consists of two groups of rollers that are tightly pressed against each other and squeezed. A conveying roller 221 is arranged on the side of the rolling roller 22 facing the immersion pool 11. A supporting net 222 is provided on the bottom side of the rolling roller 22 and the conveying roller 221.

[0068] Install the cleaning impeller 21 horizontally on the fixed bracket at the bottom of the soaking tank 11, ensuring that it is parallel to the bottom of the tank and runs smoothly. The cleaning impeller 21 is connected to the cleaning motor 211 through a coupling. The motor is fixed to the outer bracket of the soaking tank to ensure that the drive shaft is well aligned to avoid vibration. Install a protective cover to protect the motor and rotating parts to ensure safety.

[0069] Two sets of rolling rollers 22 are installed on one side of the soaking tank 11. The distance between the rollers is adjusted to achieve moderate squeezing of the yarn or fabric. The rolling rollers 22 are fixed on the bracket to ensure that they are parallel and axially stable. The conveying roller 221 is arranged on the side of the rolling roller 22 facing the soaking tank to support and drive the conveying of the yarn or fabric. A supporting net 222 is installed on the bottom side of the rolling roller 22 and the conveying roller 221. The supporting net is firmly fixed and the material is corrosion-resistant and has good water permeability.

[0070] Check that the cleaning impeller 21 rotates flexibly and without obstruction, detect the synchronous transmission and extrusion effect of the rolling roller 22 and the conveying roller 221, and confirm that the supporting net 222 is installed tightly to prevent the yarn from falling during operation.

[0071] Confirm that all components of the cleaning system 2 are firmly installed, that there is no foreign matter obstructing the cleaning impeller 21, and inject an appropriate amount of cleaning liquid, such as deionized water or a specific cleaning agent, into the soaking tank.

[0072] Start the conveying roller 221 and slowly move the yarn or fabric from one side of the immersion tank 11 into the area of the rolling roller 22. The rolling roller 22 compacts the yarn or fabric through the squeezing effect to ensure that the cleaning liquid fully penetrates the interior of the fiber and removes loose impurities at the same time. The cleaning impeller 21 starts to rotate, generating water flow to stir the cleaning liquid, thereby enhancing the fluidity and cleaning ability of the cleaning liquid.

[0073] The rotation speed of the cleaning impeller 21 and the flow rate of the cleaning liquid are controlled to ensure the cleaning effect while avoiding mechanical damage to the fibers and fabrics. The cleaning time is adjusted according to the residual dye content of the yarn and fabric, and one cleaning time is 10 to 30 minutes. After cleaning, the yarn or fabric is transported to the next process via the conveying roller 221.

[0074] The cleaning liquid is discharged through the drain port of the soaking tank 11 and enters the filtration system 3 for impurity filtration. The recovery system 4 recovers and processes the cleaning liquid for recycling. The cleaning liquid is replaced regularly according to the degree of contamination to ensure the cleaning effect.

[0075] Reference Figure 2 and Figure 5 The filtration system 3 includes a coarse filter 31, a fine filter 32 and a sedimentation tank 33. The decolorizing solvent or cleaning liquid from the soaking tank 11 passes through the coarse filter 31 and the fine filter 32 in sequence and flows into the sedimentation tank 33.

[0076] Reference Figure 4 and Figure 5 A drainage trough 311 is provided at the bottom of the soaking tank 11, the coarse filter 31 is installed in the drainage trough 311, and the fine filter 32 is installed in the pipe connecting the soaking tank 11 and the sedimentation tank 33, and an observation port 321 is provided at the pipe where the fine filter 32 is installed. The observation port 321 is blocked by a transparent plate. A partition plate 331 is provided in the sedimentation tank 33, and the partition plate 331 divides the interior of the sedimentation tank 33 into a front area and a rear area. The soaking tank 11 is connected to the front area of the sedimentation tank 33 through a pipe.

[0077] A drainage groove 311 is reserved at the bottom of the soaking tank 11. The size of the groove body matches the bottom of the soaking tank to ensure smooth drainage. The coarse filter 31 is fixedly installed in the drainage groove 311. The mesh size is selected to effectively intercept yarn, fabric residual fibers and larger particles. The coarse filter 31 should be easy to disassemble for regular cleaning and maintenance.

[0078] Connect the drain outlet of the immersion tank 11 with the front area of the sedimentation tank 33, and install a fine filter 32 in the middle section of the pipeline. The mesh size of the fine filter 32 is smaller than that of the coarse filter 31, and is used to intercept fine particles of impurities. An observation port 321 is set at the installation position of the fine filter 32. The observation port is sealed with a transparent plate to facilitate real-time observation of the filtration status. The pipeline connection is well sealed to prevent liquid leakage.

[0079] The sedimentation tank 33 has a solid structure and its capacity meets the sedimentation requirements of the filtered liquid. A partition plate 331 is vertically installed inside the sedimentation tank 33 to divide the tank body into a front area and a rear area. The height of the partition plate matches the height of the tank to prevent direct circulation of the liquid. The front area is the inlet area for the filtered liquid, and the rear area is the collection area for the precipitated liquid. The outlet of the sedimentation tank is set at the bottom of the rear area.

[0080] A small amount of decolorizing solvent only needs to flow into the front area of the sedimentation tank 33, and only needs to clean the front area of the sedimentation tank 33. A large amount of cleaning liquid needs to flow into the front area of the sedimentation tank 33 and then overflow into the back.

[0081] The transparent plate at the observation port 321 is not damaged and is well sealed.

[0082] The decolorizing solvent or cleaning liquid is discharged from the bottom of the soaking tank 11, passes through the coarse filter 31 through the drainage trough 311, intercepts larger impurities, and the filtered liquid flows through the fine filter 32 through the pipeline to further remove fine particle impurities. The operator monitors the blockage of the fine filter 32 in real time through the observation port 321 and arranges for cleaning in time. The filtered liquid enters the front area of the sedimentation tank 33, passes through the partition plate 331, and slowly flows to the rear area. The partition plate 331 blocks the flow of suspended matter, so that impurities and sediments gather at the bottom of the sedimentation tank under the action of gravity. The clean liquid is discharged from the rear area of the sedimentation tank and enters the recovery system 4 for subsequent solvent recovery or reuse.

[0083] Regularly dismantle the coarse filter 31 to clean out the trapped solid impurities to prevent blockage and drainage. When the fine filter 32 is blocked, close the relevant pipeline valves, dismantle and clean or replace the filter, and regularly clean out the sediment deposited in the sedimentation tank 33 to maintain filtration efficiency.

[0084] Reference Figure 1-Figure 5 The recovery system 4 includes a distillation tower 41 and a condenser 42. The distillation tower 41 is connected to the filtration system 3 and extracts the decolorization solvent filtered by the filtration system 3. The condenser 42 is connected to the distillation tower 41 and cools the decolorization solvent evaporated by the distillation tower 41.

[0085] Reference Figure 1-Figure 5 The distillation tower 41 is connected to the filtration system 3 through a water extraction pipe 411 . The distillation tower 41 is provided with an evaporation port 412 and a discharge port 413 . The distillation tower 41 is connected to a condenser 42 through the evaporation port 412 . The condenser 42 is connected to a collection tank 421 .

[0086] The distillation tower 41 is fixed vertically on the equipment bracket to ensure stability and facilitate pipeline connection. One end of the water pumping pipe 411 is connected to the outlet pipe of the filtration system 3, and the other end is connected to the liquid inlet of the distillation tower 41. The pipeline is well sealed to prevent leakage. The evaporation port 412 is installed on the top of the distillation tower 41. The evaporation port is connected to the air inlet of the condenser 42. The connecting pipe is made of heat-resistant and well-sealed material.

[0087] The condenser 42 is installed above or to the side of the evaporation port 412 of the distillation tower 41. The reasonable position is determined according to the spatial layout. The inlet and outlet pipes of the condenser are tightly connected to ensure that the steam is directed to the condenser. The condenser outlet pipe is connected to the collection tank 421. The collection tank should be sealed and convenient for solvent recovery and use.

[0088] The distillation tower 41 is equipped with a heating device (such as an electric heating jacket or a steam heating jacket). The heating device is firmly installed, the temperature control instrument is reasonably arranged, the condenser is equipped with a cooling water circulation system to ensure condensation efficiency, and the cooling water inlet and outlet pipes are smoothly connected.

[0089] The distillation tower 41 is equipped with a safety valve and a pressure monitoring device to prevent overpressure, and is equipped with a temperature sensor and a liquid level detector to monitor the operating status in real time.

[0090] Check whether the distillation tower 41, condenser 42 and pipeline connections are well sealed and leak-free, confirm that there is enough decolorizing solvent to be recovered in the filtration system 3, start the condenser cooling water circulation system, and ensure that the condenser is at normal operating temperature.

[0091] The heating device of the distillation tower 41 is started to heat the decolorization solvent extracted by the filtration system 3, causing it to evaporate and vaporize. The evaporated solvent vapor enters the condenser 42 through the pipeline from the evaporation port 412. The cooling water in the condenser 42 removes the heat, causing the solvent vapor to condense into liquid. The condensate flows into the collection tank 421, realizing solvent recovery.

[0092] The outlet 413 of the distillation tower 41 is used to discharge residue or non-volatile impurities. It should be opened regularly to prevent blockage. During the distillation process, the exhaust system should be kept unobstructed to avoid pressure accumulation. The temperature in the distillation tower should be monitored by a temperature sensor to ensure that the heating temperature is within the set range. The liquid level in the collection tank 421 should be observed, and the recovered solvent should be collected and processed in a timely manner. The safety valve and pressure gauge should be checked regularly to ensure safe operation of the equipment.

[0093] After the recovery is completed, turn off the heating device, stop the condensate circulation, clean the residue in the distillation tower and the collection tank, keep the equipment clean, maintain the heating device and condenser, and ensure normal use next time.

[0094] Example 1: Add the following to the above basic example: A corrosion-resistant electric heating tube is installed at the bottom or side wall of the immersion tank 11 to directly convert electrical energy into thermal energy and evenly heat the solution in the tank. The heating tube is made of stainless steel or nickel-chromium alloy, which is resistant to solvent corrosion. It is equipped with a temperature sensor and an automatic temperature control system to achieve precise temperature control and prevent overheating.

[0095] Install multiple temperature sensors to monitor the temperature distribution of the solution in the immersion tank in real time to ensure that the predetermined optimal decolorization temperature range of 50°C~80°C is reached. The specific temperature is determined according to the characteristics of the solvent and fiber. Use PLC or intelligent temperature controller to automatically adjust the heating power to maintain temperature stability and avoid temperature fluctuations affecting the decolorization effect. Set over-temperature protection to prevent equipment damage or solvent volatilization loss due to abnormal temperature.

[0096] Example 2: Different from Example 1: A jacket structure is provided on the outside of the immersion tank 11, and hot water, steam or hot oil is passed into the jacket to heat the liquid by conduction. The jacket heating method has high thermal efficiency and uniform temperature rise, which is suitable for large-capacity immersion tanks. It is equipped with temperature and pressure monitoring devices to ensure the safe operation of the heating medium.

[0097] Example 3: Add the following to the above basic example: Multiple ultrasonic transducers are installed at the bottom or side wall of the immersion tank 11, usually with a frequency of 20~40 kHz. The power is selected according to the volume of the tank. The transducers should be evenly arranged to ensure that the ultrasonic energy is evenly distributed throughout the tank body to avoid dead corners. The transducers and the tank body are firmly sealed to prevent liquid leakage.

[0098] It is linked with temperature control, stirring, heating and other systems to achieve multi-factor coupling optimization. PLC or intelligent control system is used to set ultrasonic duration, interval, power level, etc. to ensure that the decolorization process is stable and controllable.

[0099] Example 4: Different from Example 3: Equipped with an intelligent ultrasonic generator with adjustable output frequency and power, it is convenient to optimize process parameters for different decolorization systems. It supports continuous or intermittent ultrasonic working modes and can be flexibly selected in combination with the decolorization process.

[0100] The above content is merely an example and explanation of the structure of the present invention. Those skilled in the art may make various modifications or additions to the described specific embodiments or replace them in a similar manner. As long as they do not deviate from the scope defined by the structure of the invention, they should all fall within the scope of protection of the present invention.

Claims

1. A cellulose fiber yarn and fabric dye decolorization treatment device, comprising a decolorization system (1) and a cleaning system (2), wherein the decolorization system (1) is used to extract and separate the dye on the cellulose fiber yarn or fabric, and the cleaning system (2) is used to clean the cellulose fiber yarn or fabric after decolorization treatment, characterized in that: The decolorization system (1) and the cleaning system (2) are connected to a filtering system (3), and the filtering system (3) is used to filter insoluble impurities in the decolorization solvent or the cleaning liquid. The filtering system (3) is connected to a recovery system (4), and the recovery system (4) is used to separate and recover the decolorization solvent and the dye, and reuse the decolorization solvent and the dye.

2. A cellulose fiber yarn and fabric dye decolorization device according to claim 1, characterized in that: The decolorization system (1) comprises a soaking tank (11), wherein one end of the soaking tank (11) is provided with a water inlet (111) and the other end is provided with a drain outlet (112), the soaking tank (11) is connected to an external cleaning liquid supply system via the water inlet (111), and the soaking tank (11) is connected to a filtration system (3) and a recovery system (4) via the drain outlet (112).

3. The device for decolorizing cellulose fiber yarn and fabric dye according to claim 2, characterized in that: The soaking tank (11) is connected to a spray pipe (12), and the soaking tank (11) is connected to an external decolorizing solvent supply system through the spray pipe (12). The end of the spray pipe (12) is connected to a spray head (121), and the spray head (121) is installed above the soaking tank (11) and is arranged toward the soaking tank (11). The spray head (121) is slidably arranged via a slide rail (122).

4. The device for decolorizing cellulose fiber yarn and fabric dye according to claim 2, characterized in that: A stirring roller (13) is swingably installed in the soaking tank (11), and the stirring roller (13) is swingably installed in the soaking tank (11) via a stirring frame (131), and the stirring frame (131) is transmission-connected to a stirring motor (132).

5. The device for decolorizing cellulose fiber yarn and fabric dye according to claim 2, characterized in that: The cleaning system (2) comprises a cleaning impeller (21), wherein the cleaning impeller (21) is rotatably mounted on the bottom of the soaking tank (11), and the cleaning impeller (21) is transmission-connected to a cleaning motor (211).

6. A cellulose fiber yarn and fabric dye decolorization device according to claim 2 or 5, characterized in that: A pressing roller (22) is provided on one side of the soaking tank (11), and the pressing roller (22) is composed of two groups of rollers that are tightly pressed against each other and squeezed together. A conveying roller (221) is arranged on the side of the pressing roller (22) facing the soaking tank (11), and a supporting net (222) is provided on the bottom side of the pressing roller (22) and the conveying roller (221).

7. The device for decolorizing cellulose fiber yarn and fabric dye according to claim 2, characterized in that: The filtration system (3) includes a coarse filter (31), a fine filter (32) and a sedimentation tank (33). The decolorizing solvent or cleaning liquid from the soaking tank (11) passes through the coarse filter (31) and the fine filter (32) in sequence and flows into the sedimentation tank (33).

8. The device for decolorizing cellulose fiber yarn and fabric dye according to claim 7, characterized in that: A drainage trough (311) is provided at the bottom of the soaking tank (11), the coarse filter (31) is installed in the drainage trough (311), the fine filter (32) is installed in a pipe connecting the soaking tank (11) and the sedimentation tank (33), and an observation port (321) is provided at the pipe where the fine filter (32) is installed. The observation port (321) is blocked by a transparent plate. A partition plate (331) is provided in the sedimentation tank (33), and the partition plate (331) divides the interior of the sedimentation tank (33) into a front area and a rear area. The soaking tank (11) is connected to the front area of the sedimentation tank (33) through a pipe.

9. The device for decolorizing cellulose fiber yarn and fabric dye according to claim 1, characterized in that: The recovery system (4) includes a distillation tower (41) and a condenser (42). The distillation tower (41) is connected to the filtration system (3) and extracts the decolorization solvent filtered by the filtration system (3). The condenser (42) is connected to the distillation tower (41) and cools the decolorization solvent evaporated by the distillation tower (41).

10. The device for decolorizing cellulose fiber yarn and fabric dye according to claim 9, characterized in that: The distillation tower (41) is connected to the filtration system (3) via a water extraction pipe (411). The distillation tower (41) is provided with an evaporation port (412) and a discharge port (413). The distillation tower (41) is connected to a condenser (42) via the evaporation port (412). The condenser (42) is connected to a collection tank (421).

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