Knitted fabric tensionless printing and dyeing wastewater treatment equipment and method

Abstract

This invention discloses a wastewater treatment device and method for tension-free dyeing of knitted fabrics, relating to the technical field of wastewater treatment equipment. The invention includes a housing with multiple inspection windows on its outer side and a water treatment mechanism in the middle for treating the dyeing wastewater. The water treatment mechanism includes a fiber filtration assembly, comprising a receiving cylinder fixedly installed on the upper part of the housing. This application achieves efficient interception of large particulate impurities such as fibers and lint in the dyeing wastewater through the fiber filtration assembly. The wastewater enters the screening cylinder evenly through a hollow rotating shaft and drainage holes, and is thrown against the inner wall of the screening cylinder under centrifugal force. Impurities are intercepted by the filter holes, while clean water passes through the cylinder wall and is discharged. Simultaneously, the hollow rotating shaft drives the spiral conveyor blades to rotate continuously, pushing the fiber impurities intercepted on the inner wall of the screening cylinder towards the slag discharge cylinder and automatically discharging them to the collection component, avoiding clogging problems caused by impurity accumulation.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment equipment technology, specifically to wastewater treatment equipment and methods for tension-free dyeing of knitted fabrics. Background Technology

[0002] The tension-free dyeing process of knitted fabrics generates a large amount of complex wastewater. This type of wastewater contains a large amount of fiber debris, lint, thread ends, dye residue, and fine suspended particles, and is characterized by a wide variety of impurities, large differences in particle size, and high difficulty in treatment.

[0003] Reference patent document: Patent Publication No. CN119551844B, Patent Publication Date 2025-07-25, discloses a wastewater treatment device and method for textile fabric printing and dyeing, including a sedimentation tank, a support fixedly connected to the top of the sedimentation tank, a drain pipe connected to one side of the sedimentation tank, a motor fixedly connected to the top of the support, and a wastewater treatment mechanism. The motor starts and drives a rotating shaft to rotate, which in turn drives a reciprocating screw to rotate. Limited by a limiting rod, the reciprocating screw drives a threaded shell to descend vertically along the outer wall of the reciprocating screw. During the descent of the threaded shell, the water inside the sedimentation tank is filtered, allowing the water inside the sedimentation tank to enter the interior of the threaded shell through a round hole. Due to the presence of an activated carbon plate, the water entering the interior of the threaded shell passes through the activated carbon plate and enters the upper interior of the threaded shell. The filtered water inside the threaded shell enters the upper interior of the sedimentation tank through a filter screen, resulting in preliminarily treated wastewater.

[0004] Based on the search of patent numbers and the shortcomings of existing technologies, the following was found: Existing wastewater treatment equipment typically uses methods such as bar screens, sieves, or sedimentation tanks for preliminary solid-liquid separation. However, in practical applications, traditional filtration equipment is difficult to effectively trap large fibrous particles in wastewater, sieves are prone to clogging, and they lack automatic cleaning and sludge removal functions, leading to frequent shutdowns for manual cleaning, which affects the continuity of treatment. Secondly, after coagulation and flocculation, conventional sedimentation devices lack reliable separation between the upper layer of clear water and the lower layer of sludge. This results in sludge floating during drainage due to water flow disturbance, causing clear water and sludge to mix and be discharged, reducing the sedimentation separation effect and the quality of the effluent. Summary of the Invention

[0005] To address the problems of existing dyeing and printing wastewater treatment equipment, such as fiber impurities clogging screens and lack of automatic cleaning functions, as well as the lack of reliable separation in the sedimentation stage leading to the mixing of clean water and sludge during discharge, the present invention aims to provide dyeing and printing wastewater treatment equipment and methods for tension-free dyeing and printing of knitted fabrics.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a wastewater treatment device for tension-free dyeing of knitted fabrics, comprising a housing, wherein multiple inspection windows are provided on the outer side of the housing, and a water treatment mechanism is provided in the middle of the housing for treating the dyeing wastewater, the water treatment mechanism comprising: The fiber filter assembly includes a receiving cylinder fixedly installed on the upper part of the housing, a screening cylinder fixedly installed in the middle of the receiving cylinder, a hollow rotating shaft rotatably installed in the middle of the receiving cylinder, an external conveying pipe rotatably installed on one side of the hollow rotating shaft through a connector, a drain hole opened at one end of the hollow rotating shaft, and a slag cleaning component provided in the middle of the receiving cylinder. The sedimentation unit, located at the bottom of the tank, is used to remove fine suspended solids from the dyeing and printing wastewater. The interception component, located at the bottom of the container, is used to further intercept large particulate impurities in the water.

[0007] Preferably, the slag removal component includes a spiral conveyor blade rotatably mounted in the middle of a hollow shaft, the outer side of the spiral conveyor blade contacting the inner wall of the screening cylinder, two symmetrically distributed cleaning rollers rotatably mounted on the upper part of the receiving cylinder, two cleaning forks fixedly mounted on the inner side of the receiving cylinder for cooperating with the cleaning rollers, two inclined slag discharge hoppers fixedly mounted on the upper part of the receiving cylinder, a slag discharge cylinder communicating with the screening cylinder fixedly mounted on one side of the receiving cylinder, a drive assembly provided on the upper part of the housing, and three sets of collection components provided on the outer side of the housing.

[0008] Preferably, the interception assembly includes two guide rails fixedly installed at the lower part of the receiving cylinder, and an interception mesh plate is slidably engaged at the middle of the opposite sides of the two guide rails. A locking buckle is fixedly installed at one end of the interception mesh plate that passes through the receiving cylinder.

[0009] Preferably, the sedimentation assembly includes a sedimentation tank fixedly installed on the lower surface of the inner chamber of the housing, a dividing tank fixedly installed at the top of the sedimentation tank, a clear water tank fixedly installed at the top of the dividing tank, two symmetrically distributed conveying hoppers fixedly installed at the top of the clear water tank, the top of the conveying hoppers communicating with the bottom of the receiving cylinder, a stirring component in the middle of the clear water tank, a fixed frame fixedly installed in the middle of the dividing tank, multiple sets of dividing blades rotatably installed on the outer side of the fixed frame, a swing arm penetrating the middle of one side of each dividing blade, a rotating ring rotatably installed in the middle of the outer side of the dividing tank, a driven gear fixedly installed at the top of the rotating ring, a stepper motor fixedly installed on one side of the dividing tank, a driving gear fixedly installed at the drive end of the stepper motor, the driving gear and the driven gear meshing with each other, a drive rod fixedly installed on the outer side of each rotating ring, the drive rods slidingly locked in the middle of the swing arm, and multiple sets of drug delivery components provided at the lower part of the housing.

[0010] Preferably, the driving component includes a drive motor fixedly installed on one side of the top of the housing. The drive motor and the hollow rotating shaft are connected by a synchronous pulley and a synchronous belt. Both cleaning rollers are connected to the hollow rotating shaft by a synchronous belt and a synchronous pulley.

[0011] Preferably, the collecting component includes a mounting plate fixedly installed on the outer wall of the box. A material trough is provided on one side of the mounting plate, and two symmetrically distributed hooks are fixedly installed on one side of the material trough. The hooks are hung on one side of the mounting plate, and bolts are threaded on the lower part of the hooks.

[0012] Preferably, the stirring component includes a stirring shaft rotatably mounted in the middle of the water tank, the stirring shaft being rotatably mounted in the middle of the fixed frame, two sets of symmetrically distributed stirring blades on the outer side of the stirring shaft, a servo motor being fixedly mounted at the top of the water tank, and the top of the stirring shaft being fixedly mounted at the drive end of the servo motor.

[0013] Preferably, a clean water discharge pipe is installed on one side of the lower part of the clean water tank via a flange, and a sludge water discharge pipe is installed on one side of the lower part of the sedimentation tank via a flange.

[0014] Preferably, the drug delivery component includes a medicine box fixedly installed at the four corners of the lower part of the box body. A stirrer is installed at the top center of each medicine box via a flange. A drug delivery pump is installed on one side of the upper part of each medicine box via a flange. A drug delivery pump is fixedly installed on the other side of the upper part of each medicine box. The input ends of the drug delivery pump and the drug delivery pump are both located inside the medicine box. The output end of the drug delivery pump is fixedly installed on the upper part of the clean water tank. The input end of the medicine box is connected to an external drug delivery pipeline.

[0015] The operating method of the wastewater treatment equipment for tension-free printing and dyeing of knitted fabrics includes the following steps: S1: The dyeing and printing wastewater enters the screening cylinder through an external conveying pipe and a hollow rotating shaft for filtration. The wastewater is discharged through small holes, and impurities are collected and discharged through the slag removal component. S2: The discharged wastewater is filtered again through the interception component to prevent some thread ends and lint from being discharged through the small holes of the screening cylinder; S3: After passing through the interception component, the wastewater enters the sedimentation component. Coagulants and flocculants are added through the dosing component. With the cooperation of the stirring component, the tiny suspended particles and colloidal substances in the water are destabilized and aggregated to form large flocs, which accelerates the sedimentation. The sedimented wastewater and the upper clear water are separated by the sedimentation component and discharged intermittently, achieving rapid separation of sedimented wastewater and clear water.

[0016] Beneficial effects Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This application achieves efficient interception of large particulate impurities such as fibers and lint in dyeing and printing wastewater through a fiber filtration assembly. The wastewater enters the screening cylinder evenly through a hollow rotating shaft and drainage holes. Under centrifugal force, it is thrown against the inner wall of the screening cylinder, where impurities are intercepted by the filter holes, while clean water passes through the cylinder wall and is discharged. At the same time, the hollow rotating shaft drives the spiral conveyor blades to rotate continuously, pushing the fiber impurities intercepted on the inner wall of the screening cylinder towards the slag discharge cylinder and automatically discharging them to the collection component, thus avoiding the clogging problem caused by the accumulation of impurities. In addition, the cleaning roller and cleaning fork work together. The bristles of the cleaning roller extend into the filter holes to clean the blockages, while the cleaning fork scrapes off the fibers wrapped around the bristles, ensuring that the filter holes are unobstructed for a long time and guaranteeing the continuity and stability of wastewater treatment.

[0017] 2. This application achieves efficient mixing of wastewater and reagents and efficient separation of clear water and sludge through a sedimentation component. After being intercepted, the wastewater enters the clear water tank, while the dosing component quantitatively adds coagulant and flocculant. The stirring component (servo motor driving the stirring shaft and stirring blades) forms a composite flow field, which enables the reagents to quickly mix with, destabilize and aggregate into large flocs of tiny suspended particles and colloidal substances. The flocs settle to the bottom of the sedimentation tank under gravity. After sedimentation, the stepper motor drives the rotating ring to rotate, and the drive rod drives the dividing plate blades to gradually change from an inclined state to a horizontal state, thereby completely separating the upper clear water layer and the lower sludge water layer. Subsequently, the clear water discharge pipe is opened first to discharge the supernatant, and then the sludge water discharge pipe is opened to discharge the bottom sludge, thereby avoiding sludge floating and secondary mixing caused by water flow disturbance during drainage, improving sedimentation separation efficiency and effluent quality.

[0018] 3. This application uses an interception component to perform secondary fine interception on the wastewater after fiber filtration, further removing large particulate impurities such as residual lint and fibers from the water. When the wastewater flows along the guide rail through the interception screen, the stainless steel woven mesh on the screen captures residual impurities, preventing them from entering the subsequent sedimentation components and causing pipe blockage or affecting the sedimentation effect. At the same time, a quick-release latch is installed at one end of the interception screen, which can realize the quick pulling, replacement and cleaning of the screen. The operation is convenient and efficient, which not only improves the wastewater pretreatment effect, but also extends the service life of subsequent equipment. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention.

[0020] Figure 2 This is a schematic cross-sectional view of the present invention.

[0021] Figure 3 This is a schematic diagram of the cross-sectional structure of the container cylinder of the present invention.

[0022] Figure 4 This is a schematic diagram of the cross-sectional structure of the screening cylinder of the present invention.

[0023] Figure 5 This is a schematic diagram of the interception component structure of the present invention.

[0024] Figure 6 This is a schematic diagram of the structure of the components collected in this invention.

[0025] Figure 7 For the present invention Figure 6 Enlarged view of point A in the middle.

[0026] Figure 8 This is a schematic cross-sectional view of the water tank structure of the present invention.

[0027] Figure 9 This is a schematic diagram of the connection structure between the fixing frame and the dividing plate leaf in this invention.

[0028] Figure 10 This is a schematic cross-sectional view of the precipitation component of the present invention.

[0029] Figure 11 This is a schematic diagram of the drug delivery component structure of the present invention.

[0030] In the diagram: 1. Housing; 11. Inspection window; 2. Water treatment mechanism; 21. Fiber filter assembly; 211. Drive motor; 212. Receiving cylinder; 2121. Slag discharge cylinder; 213. Cleaning roller; 214. Screening cylinder; 2141. Cleaning fork; 2142. Slag discharge hopper; 215. Hollow rotating shaft; 2151. Screw conveyor blade; 2152. Drain hole; 2153. External conveying pipe; 216. Material trough; 217. Mounting plate; 218. Hook; 2181. Bolt; 219. Conveying hopper; 22. Sedimentation assembly; 221. Clear water tank; 2221. Clear water discharge pipe 222. Sedimentation tank; 2222. Sludge water discharge pipe; 223. Dividing box; 224. Servo motor; 225. Stirring shaft; 226. Stirring blade; 227. Fixing frame; 2271. Dividing plate blade; 2272. Stepper motor; 2273. Drive gear; 2274. Rotating ring; 2275. Driven gear; 2276. Drive rod; 2277. Swing arm; 228. Medicine tank; 2281. Medicine pump; 2282. Medicine delivery pump; 229. Mixer; 23. Interception assembly; 231. Interception mesh plate; 232. Guide rail; 233. Lock. Detailed Implementation

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

[0032] Example: Figure 1-11As shown, this invention provides a wastewater treatment device for tension-free dyeing of knitted fabrics, including a housing 1. Multiple inspection windows 11 are provided on the outer side of the housing 1 to facilitate the replacement of easily damaged parts and routine maintenance. A water treatment mechanism 2 is located in the middle of the housing 1 for treating the dyeing wastewater. Specifically, the equipment in the water treatment mechanism 2 is fixedly installed to the inner wall of the housing 1 using screws and angle brackets. Reliable connections between components are achieved through sealing flanges and rubber sealing rings to prevent wastewater leakage. The water treatment mechanism 2 includes: The fiber filter assembly 21 includes a receiving cylinder 212 fixedly installed on the upper part of the housing 1. Specifically, the receiving cylinder 212 is a horizontal cylindrical body made of 304 stainless steel, and its two ends are sealed and fixed to the inner wall of the housing 1 by flanges. A screening cylinder 214 is fixedly installed in the middle of the receiving cylinder 212. Specifically, the screening cylinder 214 is a cylindrical porous body with filter holes evenly opened on the cylinder wall. It is made of 316L stainless steel perforated mesh, and the hole walls are passivated to prevent corrosion and clogging. A hollow rotating shaft 215 is rotatably installed in the middle of the receiving cylinder 212. Specifically, the hollow shaft 215 is... The rotating shaft 215 is a hollow tubular structure. Both ends are rotatably connected to the bearing seats at the ends of the receiving cylinder 212 through deep groove ball bearings. The bearing seats have built-in skeleton oil seals to achieve dynamic sealing and prevent wastewater leakage. An external conveying pipe 2153 is rotatably installed on one side of the hollow rotating shaft 215 through a connector. The external conveying pipe 2153 is connected to the front end collection tank of the dyeing and printing wastewater to provide a water inlet channel for the equipment. A drain hole 2152 is opened at one end of the hollow rotating shaft 215. Wastewater can be evenly discharged into the screening cylinder 214 through the drain hole 2152. A slag cleaning component is provided in the middle of the receiving cylinder 212. The sedimentation component 22 is located at the bottom of the tank 1 and is used to remove fine suspended solids in the dyeing and printing wastewater. The interception component 23 is located at the lower part of the receiving cylinder 212 and is used to further intercept large particulate impurities in the water.

[0033] The slag removal component includes a spiral conveyor blade 2151 rotatably mounted in the middle of the hollow shaft 215. The outer side of the spiral conveyor blade 2151 is in contact with the inner wall of the screening cylinder 214. Specifically, the spiral conveyor blade 2151 is a continuous stainless steel spiral blade, welded and fixed to the outer wall of the hollow shaft 215. When the hollow shaft 215 rotates, the spiral conveyor blade 2151 can continuously push the fibrous impurities intercepted on the inner wall of the screening cylinder 214 toward the slag discharge cylinder 2121. Two symmetrically distributed cleaning rollers 213 are rotatably mounted on the upper part of the receiving cylinder 212. The cleaning rollers 213 are cylindrical nylon brush rollers with nylon bristles evenly planted on the outer circumference of the roller. The length of the bristles matches the depth of the filter holes in the screening cylinder 214, allowing them to reach into the holes to clean up clogging impurities. Two cleaning forks 2141 are fixedly mounted on the inner side of the receiving cylinder 212 to cooperate with the cleaning rollers 213. The cleaning fork 2141 is a comb-shaped stainless steel structure with the tooth spacing matching the bristle spacing. When the cleaning roller 213 rotates, the cleaning fork 2141 can scrape off the fiber impurities wrapped on the bristles, preventing the bristles from failing. Two inclined slag discharge hoppers 2142 are fixedly installed on the upper part of the receiving cylinder 212. The inner wall of the slag discharge hopper 2142 is polished to facilitate the sliding and discharge of impurities. It also works in conjunction with the cleaning fork 2141 to clean the scraped impurities. A slag discharge cylinder 2121 that communicates with the screening cylinder 214 is fixedly installed on one side of the receiving cylinder 212. The upper part of the box 1 is equipped with a drive assembly, and the outer side of the box 1 is equipped with three sets of collection components.

[0034] The interception assembly 23 includes two guide rails 232 fixedly installed at the lower part of the receiving cylinder 212. Specifically, the upper surface of the guide rails 232 has an arc-shaped structure to facilitate the rapid descent and discharge of sewage. The opposite sides of the guide rails 232 are provided with U-shaped stainless steel grooves, and polytetrafluoroethylene wear-resistant strips are installed in the grooves to reduce sliding resistance. An interception mesh plate 231 is slidably engaged in the middle of the opposite sides of the two guide rails 232. Specifically, the interception mesh plate 231 has a rectangular frame structure, and 304 stainless steel woven mesh is installed in the frame. Rubber sealing strips are embedded on the edge of the mesh plate to form a sealing fit with the guide rails 232 to prevent short circuit of wastewater. A latch 233 is fixedly installed at one end of the interception mesh plate 231 that passes through the receiving cylinder 212. Specifically, the latch 233 is a quick-release buckle structure, which can realize the quick pull-out replacement and cleaning of the interception mesh plate 231 without stopping the equipment for disassembly.

[0035] The sedimentation assembly 22 includes a sedimentation tank 222 fixedly installed on the lower surface of the inner wall of the housing 1. A dividing tank 223 is fixedly installed at the top of the sedimentation tank 222, and a clear water tank 221 is fixedly installed at the top of the dividing tank 223. Two symmetrically distributed conveying hoppers 219 are fixedly installed at the top of the clear water tank 221. The top of the conveying hoppers 219 is connected to the bottom of the receiving cylinder 212. A stirring component is provided in the middle of the clear water tank 221. A fixing frame 227 is fixedly installed in the middle of the dividing tank 223. Multiple sets of dividing blades 2271 are rotatably installed on the outside of the fixing frame 227. The dividing blades 2271 are inclined during the sedimentation process of sewage entering the sedimentation, which facilitates the guidance of the precipitated flocculent material and accelerates the sedimentation. A swing arm 2277 is provided through the dividing tank 223 on one side of each dividing blade 2271. The swing arm 2277 is an L-shaped stainless steel rod, one end of which is fixedly connected to the dividing blade 2271, and the other end extends... The outer side of the dividing box 223 has a sliding groove in the middle of the side, and the drive rod 2276 is slidably locked in the sliding groove. A rotating ring 2274 is rotatably installed in the middle of the outer side of the dividing box 223. A driven gear 2275 is fixedly installed at the top of the rotating ring 2274. A stepper motor 2272 is fixedly installed on one side of the dividing box 223. A drive gear 2273 is fixedly installed at the drive end of the stepper motor 2272. The drive gear 2273 and the driven gear 2275 are meshed and connected to each other. Specifically, the stepper motor 2272 is a two-phase hybrid stepper motor. By driving the drive gear 2273 to rotate, it drives the driven gear 2275 to rotate, so that the rotating ring 2274 can rotate at a low speed. The outer side of the rotating ring 2274 is fixedly installed with drive rods 2276, and the drive rods 2276 are slidably locked in the middle of the swing arm 2277. The lower part of the box 1 is provided with multiple sets of drug delivery components.

[0036] The driving components include a drive motor 211 fixedly mounted on one side of the top of the housing 1. The drive motor 211 is connected to the hollow shaft 215 via a synchronous pulley and a synchronous belt. Both cleaning rollers 213 are connected to the hollow shaft 215 via synchronous belts and synchronous pulleys. Specifically, the drive motor 211 is a three-phase asynchronous motor of model YE3-100L1-4. The power line of the drive motor 211 is connected to the AC contactor and thermal relay in the equipment control box. The control box is also equipped with a PLC controller, which can control the start, stop, speed and running time of the drive motor 211 through programming to achieve automated control. The synchronous belt and synchronous pulley drive can first drive the hollow shaft 215 to rotate, and under the drive of the other two synchronous belts and synchronous pulleys, it can drive the two cleaning rollers 213 to rotate.

[0037] The collecting component includes a mounting plate 217 fixedly installed on the outer wall of the housing 1. Specifically, the mounting plate 217 is a rectangular stainless steel plate, which is fixed to the outer wall of the housing 1 by screws. A material trough 216 is provided on one side of the mounting plate 217. Two symmetrically distributed hooks 218 are fixedly installed on one side of the material trough 216. Specifically, the hooks 218 are L-shaped stainless steel components with hook-shaped upper ends, which can be hung on the upper edge of the mounting plate 217. The hooks 218 are hung on one side of the mounting plate 217. Bolts 2181 are threaded on the lower part of the hooks 218. By tightening the bolts 2181 on the lower part of the hooks 218, the lower part of the hooks 218 is also hook-shaped. After the upper part is hung, the lower bolts 2181 are then installed, thereby fixing the hooks 218 to one side of the mounting plate 217.

[0038] The stirring component includes a stirring shaft 225 rotatably mounted in the middle of the clear water tank 221. The stirring shaft 225 is rotatably mounted in the middle of the fixed frame 227. Two sets of symmetrically distributed stirring blades 226 are provided on the outer side of the stirring shaft 225. Specifically, the two sets of stirring blades 226 are respectively set in the clear water tank 221 and the sedimentation tank 222. The stirring blades 226 are folding stainless steel blades, and the blades form a 45° angle with the stirring shaft 225, which can form a composite flow field of axial flow and radial flow, promoting the uniform mixing of the reagent and wastewater. A servo motor 224 is fixedly mounted on the top of the clear water tank 221. The top of the stirring shaft 225 is fixedly mounted on the drive end of the servo motor 224. Specifically, the servo motor 224 is a Panasonic AC servo motor. The power cord of the servo motor 224 is connected to the servo driver in the control box. The PLC controller can control the speed, direction and operating mode of the servo motor 224 through pulse signals to achieve precise control of the stirring process.

[0039] A clean water discharge pipe 2221 is installed on the lower side of the clean water tank 221 via a flange. Specifically, an electromagnetic flow meter and an electric butterfly valve are installed on the clean water discharge pipe 2221 to achieve quantitative discharge of the supernatant. A sludge discharge pipe 2222 is installed on the lower side of the sedimentation tank 222 via a flange. Specifically, a sludge discharge valve is installed in the middle of the sludge discharge pipe 2222 to discharge the sludge in the sedimentation tank 222 at regular intervals and in quantitative quantities. All pipe connections are sealed with rubber sealing rings to prevent leakage.

[0040] The drug delivery system includes a medicine tank 228 fixedly installed at the four corners of the lower part of the housing 1. The medicine tank 228 is a vertical cylindrical PE storage tank with a sealed cap on the top. A level gauge is installed on the outside of the tank to monitor the drug level in real time. A stirrer 229 is installed at the top center of the medicine tank 228 via a flange. Specifically, the stirrer 229 is a cycloidal pinwheel reducer stirrer, which can stir the drug in the medicine tank 228 to prevent the drug from settling and separating. A drug feeding pump 2281 is installed on one side of the upper part of the medicine tank 228 via a flange, and a drug delivery pump 2282 is fixedly installed on the other side of the upper part of the medicine tank 228. The input ends of the drug feeding pump 2281 and the drug delivery pump 2282 are located inside the medicine tank 228. The output end of the drug feeding pump 2281 is fixedly installed on the upper part of the clean water tank 221. The input end of the medicine tank 228 is connected to an external drug delivery pipeline.

[0041] The operating method of the wastewater treatment equipment for tension-free printing and dyeing of knitted fabrics includes the following steps: S1: Dyeing and printing wastewater enters the screening cylinder 214 through the external conveying pipe 2153 and the hollow rotating shaft 215. When the wastewater enters the screening cylinder 214, the hollow rotating shaft 215 rotates under the drive motor 211. Under the action of centrifugal force, the wastewater is thrown against the inner wall of the screening cylinder 214 and discharged through the filter holes. Fibers, lint and other impurities in the wastewater are trapped inside the screening cylinder 214. At the same time, the spiral conveying blade 2151 rotates synchronously with the hollow rotating shaft 215, pushing the trapped impurities toward the slag discharge cylinder 2121. Meanwhile, the bristles extend into the filter holes to clean the blockage of impurities, and the cleaning fork 2141 scrapes off the impurities wrapped on the bristles. The impurities are finally discharged into the material trough 216 of the collection component through the slag discharge cylinder 2121, realizing the automatic collection of impurities. S2: The discharged wastewater is filtered again through the interception component 23 for impurities. When the wastewater flows through the interception screen 231, the screen can further remove large particles of impurities such as residual lint and fuzz in the water, preventing impurities from entering the subsequent sedimentation component 22 and causing pipe blockage or affecting the sedimentation effect. The interception screen 231 can be quickly pulled out and replaced and cleaned through the latch 233. S3: After passing through the interception component 23, the wastewater enters the sedimentation component 22 through the conveying bucket 219. The PLC controller controls the dosing pump 2281 of the dosing component according to the wastewater flow signal to quantitatively add coagulant and flocculant into the clear water tank 221. The servo motor 224 drives the stirring shaft 225 to rotate, and the stirring blade 226 fully mixes the agent and wastewater, so that the tiny suspended particles and colloidal substances in the water are destabilized and aggregated to form large flocs. The flocs settle into the sedimentation tank 222 under the action of gravity. After sedimentation is complete, the stepper motor 2272 drives the rotating ring 2274 to rotate, driving the dividing plate blade 2271 to adjust its angle, gradually changing it from an inclined state to a horizontal state. This separates the water in the upper clear water tank 221 from the sludge water in the sedimentation tank 222, preventing the water flow from being disrupted during drainage and causing the settled sludge water to be discharged simultaneously with the clear water. During drainage, the upper clear water discharge pipe 2221 opens first to drain the water. After the clear water is drained, the lower sludge water discharge pipe 2222 then drains the water, achieving rapid separation of the settled wastewater from the upper clear water.

[0042] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0043] During operation, the dyeing and printing wastewater first enters the hollow rotating shaft 215 through the external conveying pipe 2153, and is evenly discharged into the screening cylinder 214 through the drain hole 2152 opened at one end of the hollow rotating shaft 215. Driven by the drive motor 211, the hollow rotating shaft 215 rotates, and the wastewater is thrown towards the inner wall of the screening cylinder 214 under the action of centrifugal force. Large particles such as fibers and lint are intercepted by the filter holes on the wall of the screening cylinder 214, while the clean water that passes through the filter holes enters the annular outlet cavity between the receiving cylinder 212 and the screening cylinder 214 and flows downward. Meanwhile, the spiral conveyor blades 2151 welded to the outer wall of the hollow rotating shaft 215 rotate synchronously with the hollow rotating shaft 215, continuously pushing the fibrous impurities trapped on the inner wall of the screening cylinder 214 toward the discharge cylinder 2121. The impurities are eventually discharged through the discharge cylinder 2121 and fall into the material trough 216 of the collection component. While the spiral conveyor blades 2151 drive the impurities to rotate and push, the two cleaning rollers 213 connected to the hollow rotating shaft 215 via a synchronous belt and synchronous pulley also rotate. The bristles of the cleaning rollers 213 extend into the filter holes of the screening cylinder 214 to clean the blockage impurities, while the cleaning fork 2141 fixed inside the receiving cylinder 212 scrapes off the fibers wrapped on the bristles of the cleaning rollers 213. The scraped impurities slide off and are discharged through the inclined discharge hopper 2142, thereby achieving long-term unobstructed filter holes and automatic collection of impurities. The wastewater treated by the fiber filter assembly 21 flows downward and enters the interception assembly 23. The wastewater flows along the two guide rails 232 and passes through the interception mesh plate 231. The stainless steel woven mesh on the interception mesh plate 231 performs secondary fine interception of large particles such as residual thread ends and lint in the water, further preventing impurities from entering the subsequent treatment unit. After passing through the interception mesh 231, the wastewater enters the clear water tank 221 of the sedimentation component 22 through the conveying bucket 219. At this time, the PLC controller controls the drug delivery pump 2281 of the drug delivery component according to the wastewater flow signal to quantitatively add coagulant and flocculant from the drug tank 228 into the clear water tank 221. At the same time, the servo motor 224 drives the stirring shaft 225 to rotate, which drives two sets of symmetrically distributed stirring blades 226 (located in the clear water tank 221 and the sedimentation tank 222 respectively) to form a composite flow field of axial flow and radial flow, so that the reagent and the tiny suspended particles and colloidal substances in the wastewater are fully mixed, destabilized and aggregated to form large flocs. The flocs settle to the bottom of the sedimentation tank 222 under the action of gravity. Once sedimentation is complete, the stepper motor 2272 starts, and through the meshing transmission of the drive gear 2273 and the driven gear 2275, it drives the rotating ring 2274 to rotate at a low speed. The drive rod 2276, which is fixedly installed on the outside of the rotating ring 2274, is slidably locked in the sliding groove in the middle of the swing arm 2277, thereby driving multiple sets of dividing blades 2271 to rotate around the fixed frame 227, so that the dividing blades 2271 gradually change from the initial inclined state to the horizontal state, completely separating the clear water layer in the upper clear water tank 221 from the sludge water layer in the lower sedimentation tank 222. After separation, first open the clear water discharge pipe 2221 located on the lower side of the clear water tank 221 to discharge the supernatant in a measured amount. After the clear water is discharged, open the sludge discharge pipe 2222 on the lower side of the sedimentation tank 222 to discharge the bottom sludge. Throughout the process, due to the horizontal isolation effect of the dividing plate blades 2271, the sludge floating and secondary mixing caused by water flow disturbance during drainage are effectively avoided, and the rapid separation of sedimented wastewater and upper clear water is achieved.

[0044] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0045] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A wastewater treatment device for tension-free dyeing of knitted fabrics, comprising a housing (1), characterized in that: The outer side of the box (1) is provided with multiple inspection windows (11), and the middle of the box (1) is provided with a water treatment mechanism (2) for treating dyeing and printing wastewater. The water treatment mechanism (2) includes: The fiber filter assembly (21) includes a receiving cylinder (212) fixedly installed on the upper part of the housing (1). A screening cylinder (214) is fixedly installed in the middle of the receiving cylinder (212). A hollow rotating shaft (215) is rotatably installed in the middle of the receiving cylinder (212). An external conveying pipe (2153) is rotatably installed on one side of the hollow rotating shaft (215) through a connector. A drain hole (2152) is opened at one end of the hollow rotating shaft (215). A slag cleaning component is provided in the middle of the receiving cylinder (212). A sedimentation component (22) is installed at the bottom of the tank (1) to remove fine suspended solids in the dyeing and printing wastewater; An interception component (23) is disposed at the lower part of the receiving cylinder (212) for further interception of large particulate impurities in the water.

2. The wastewater treatment equipment for tension-free dyeing of knitted fabrics as described in claim 1, characterized in that, The slag removal component includes a spiral conveyor blade (2151) rotatably installed in the middle of a hollow shaft (215). The outer side of the spiral conveyor blade (2151) is in contact with the inner wall of the screening cylinder (214). Two symmetrically distributed cleaning rollers (213) are rotatably installed on the upper part of the receiving cylinder (212). Two cleaning forks (2141) that cooperate with the cleaning rollers (213) are fixedly installed on the inner side of the receiving cylinder (212). Two inclined slag discharge hoppers (2142) are fixedly installed on the upper part of the receiving cylinder (212). A slag discharge cylinder (2121) that communicates with the screening cylinder (214) is fixedly installed on one side of the receiving cylinder (212). A drive assembly is provided on the upper part of the box (1). Three sets of collection components are provided on the outer side of the box (1).

3. The wastewater treatment equipment for tension-free dyeing of knitted fabrics as described in claim 1, characterized in that, The interception assembly (23) includes two guide rails (232) fixedly installed at the lower part of the receiving cylinder (212). An interception mesh plate (231) is slidably attached to the middle of the opposite side of the two guide rails (232). A latch (233) is fixedly installed at one end of the interception mesh plate (231) that passes through the receiving cylinder (212).

4. The wastewater treatment equipment for tension-free dyeing of knitted fabrics as described in claim 1, characterized in that, The sedimentation assembly (22) includes a sedimentation tank (222) fixedly installed on the lower surface of the inner wall of the housing (1). A dividing tank (223) is fixedly installed at the top of the sedimentation tank (222). A clear water tank (221) is fixedly installed at the top of the dividing tank (223). Two symmetrically distributed conveying hoppers (219) are fixedly installed at the top of the clear water tank (221). The top of the conveying hoppers (219) is connected to the bottom of the receiving cylinder (212). A stirring component is provided in the middle of the clear water tank (221). A fixing frame (227) is fixedly installed in the middle of the dividing tank (223). Multiple sets of dividing blades (2271) are rotatably installed on the outer side of the fixing frame (227). The middle of one side of each dividing blade (2271) is penetrated by... A swing arm (2277) is provided in the dividing box (223). A rotating ring (2274) is rotatably installed in the middle of the outer side of the dividing box (223). A driven gear (2275) is fixedly installed at the top of the rotating ring (2274). A stepper motor (2272) is fixedly installed on one side of the dividing box (223). A driving gear (2273) is fixedly installed at the driving end of the stepper motor (2272). The driving gear (2273) and the driven gear (2275) mesh with each other. A drive rod (2276) is fixedly installed on the outer side of the rotating ring (2274). The drive rod (2276) is slidably locked in the middle of the swing arm (2277). Multiple drug delivery components are provided in the lower part of the box body (1).

5. The wastewater treatment equipment for tension-free dyeing of knitted fabrics as described in claim 2, characterized in that, The driving component includes a drive motor (211) fixedly installed on one side of the top of the housing (1). The drive motor (211) and the hollow shaft (215) are connected by a synchronous pulley and a synchronous belt. The two cleaning rollers (213) are connected to the hollow shaft (215) by a synchronous belt and a synchronous pulley.

6. The wastewater treatment equipment for tension-free dyeing of knitted fabrics as described in claim 2, characterized in that, The collecting component includes a mounting plate (217) fixedly installed on the outer wall of the box (1). A material trough (216) is provided on one side of the mounting plate (217). Two symmetrically distributed hooks (218) are fixedly installed on one side of the material trough (216). The hooks (218) are hung on one side of the mounting plate (217). Bolts (2181) are threaded on the lower part of the hooks (218).

7. The wastewater treatment equipment for tension-free dyeing of knitted fabrics as described in claim 4, characterized in that, The stirring component includes a stirring shaft (225) rotatably mounted in the middle of the water tank (221). The stirring shaft (225) is rotatably mounted in the middle of the fixed frame (227). Two sets of symmetrically distributed stirring blades (226) are provided on the outer side of the stirring shaft (225). A servo motor (224) is fixedly mounted on the top of the water tank (221). The top of the stirring shaft (225) is fixedly mounted on the drive end of the servo motor (224).

8. The wastewater treatment equipment for tension-free dyeing of knitted fabrics as described in claim 4, characterized in that, A clean water discharge pipe (2221) is installed on one side of the lower part of the clean water tank (221) via a flange, and a sludge discharge pipe (2222) is installed on one side of the lower part of the sedimentation tank (222) via a flange.

9. The wastewater treatment equipment for tension-free dyeing of knitted fabrics as described in claim 4, characterized in that, The drug delivery component includes a medicine box (228) fixedly installed at the four corners of the lower part of the box (1). A stirrer (229) is installed at the top center of the medicine box (228) through a flange. A drug delivery pump (2281) is installed on one side of the upper part of the medicine box (228) through a flange. A drug delivery pump (2282) is fixedly installed on the other side of the upper part of the medicine box (228). The input end of the drug delivery pump (2281) and the input end of the drug delivery pump (2282) are both located inside the medicine box (228). The output end of the drug delivery pump (2281) is fixedly installed on the upper part of the clean water tank (221). The input end of the medicine box (228) is connected to an external drug delivery pipeline.

10. A method for using a wastewater treatment device for tension-free dyeing of knitted fabrics, comprising the wastewater treatment device for tension-free dyeing of knitted fabrics as described in any one of claims 1-9, characterized in that... Includes the following steps: S1: The dyeing and printing wastewater is transported through the external conveying pipe (2153) and the hollow rotating shaft (215) into the screening cylinder (214) for filtration. The wastewater is discharged through the small hole, and the impurities are collected and discharged through the slag removal component. S2: The discharged wastewater is filtered again through the interception component (23) to prevent some thread ends and lint from being discharged through the small holes of the screening cylinder (214); S3: The wastewater after passing through the interception component (23) enters the sedimentation component (22). Coagulants and flocculants are added through the dosing component. With the cooperation of the stirring component, the tiny suspended particles and colloidal substances in the water are destabilized and aggregated to form large flocs, which accelerates the sedimentation. The sedimented wastewater and the upper clear water are separated through the sedimentation component (22) and discharged intermittently to achieve rapid separation of sedimented wastewater and clear water.

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