Printing and dyeing wastewater recycling device

Abstract

The invention belongs to the technical field of sewage treatment, and particularly relates to a printing and dyeing wastewater recycling device which comprises a wastewater tank body, and a slag scraping tank body is arranged in the wastewater tank body. In combination with triggering, energy storage and release linkage mechanisms of a baffle plate, a sliding plate and an arc-shaped spring rod in the swinging slag scraping assembly, the working angle and the action mode of a slag scraping plate are adaptively adjusted, and then the dual functions of horizontal pushing and shaking scraping are achieved on the operation strategy; the scraper blade can accurately and dynamically respond to the real-time change of the thickness and viscosity of a scum layer in actual operation, breaks through the limitation of a single operation mode of a traditional fixed scraper blade, effectively solves the industrial problems that thin scum cannot be completely scraped and collected, and thick scum or sticky scum is blocked and overloaded, remarkably improves the scum stripping efficiency and collection integrity, and is suitable for large-scale popularization and application. And moreover, the hardened scum can be effectively crushed and removed by utilizing the instantaneous impact force generated by the shaking and scraping action of the quick forward swinging of the scum scraping plate.

Description

Technical Field

[0001] This invention belongs to the field of wastewater treatment technology, and in particular relates to a device for recycling dyeing and printing wastewater. Background Technology

[0002] The wastewater recycling and reuse device for dyeing and printing is a key piece of equipment for realizing the purification and reuse of dyeing and printing wastewater, reducing environmental pressure and water resource consumption. Among them, the dissolved air flotation machine is one of the core treatment units. Its sludge scraping mechanism, as an important mechanical component of the flotation treatment, directly affects the wastewater purification effect and the quality of subsequent reuse. According to the structural form, the sludge scraping mechanism of the dissolved air flotation machine is mainly divided into chain scraper, spiral scraper, and traveling scraper, etc.; according to the driving method, it can be divided into motor and reducer driven type, hydraulic driven type, etc.

[0003] The working principle of the scum scraping mechanism in a dissolved air flotation (DAF) machine is as follows: First, microbubbles generated by the dissolved air system adhere to the scum in the dyeing and printing wastewater, causing the scum to float to the surface and form a scum layer. Then, a drive unit moves the scraping components (scraper plates, scraper chains, etc.) reciprocating or circulating along the water surface, scraping the scum layer from the flotation tank surface into a scum collection tank. Finally, a conveying mechanism transports the collected scum to subsequent filter press and harmless treatment units, completing the separation of scum from purified water and ensuring that the purified wastewater meets recycling standards. The entire scum scraping process requires the coordination of the flotation tank's level control system, transmission guide mechanism, and other auxiliary mechanical components to achieve stable operation.

[0004] In existing dyeing and printing wastewater recycling devices, the sludge scraping mechanism of the dissolved air flotation unit has the following problems in practical application: Existing scraper blades mostly adopt a fixed angle and length design. However, the scum generated by dyeing and printing wastewater is characterized by uneven thickness and large viscosity fluctuations. When the scum is thick or has high viscosity, the fixed structure of the scraper blade is prone to scum accumulation and incomplete scraping. Some scum will flow back to the purification water area with the water flow, affecting the effluent quality. When the scum is thin, the contact pressure between the scraper blade and the water surface is insufficient, making it difficult to effectively scrape the scum, resulting in low scraping efficiency. At the same time, the transmission mechanism of the scraper component is mostly a rigid connection. In long-term scraping operations, if hard materials in the scum are encountered... Impurities (such as yarn clumps and metal shavings) can easily generate impact loads, leading to mechanical failures such as scraper plate deformation and transmission gear wear, affecting the continuous operation of the equipment. When the scraper plate returns to its original position after completing the scraping operation, the floating scum adhering to its surface will flow downwards due to gravity. Some of the floating scum, carrying sewage, will seep into the interior through the connection gap between the scraper plate and the scraper arm and the gaps in the transmission components. This will cause sewage to enter the transmission components, further aggravating corrosion and jamming of the transmission components, shortening the service life of the transmission components, and increasing the frequency and cost of equipment maintenance. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a device for recycling dyeing and printing wastewater.

[0006] To achieve the above objectives, the technical solution of the present invention is implemented as follows: This invention discloses a device for recycling and reusing dyeing and printing wastewater, including a wastewater tank with a slag scraping tank inside. The slag scraping and conveying mechanism is mounted on the wastewater tank and includes a drive chain driven by a drive sprocket and a driven sprocket, a pair of drive wheels that rotate synchronously with the driven sprocket, and a drive chain that runs around the pair of drive wheels. An adaptive slag scraping mechanism includes at least one slag scraper mounted on the drive chain, and a swinging slag scraping assembly connecting the slag scraper to the drive chain, for driving the slag scraper to reciprocate swinging motion. An automatic cleaning mechanism is fixed on the wastewater tank and located above the slag scraping tank. It is used to automatically scrape off the residual slag adhering to the surface of the slag scraping plate when the scraping plate passes by with the active chain. A spacing adjustment mechanism for adjusting the overall horizontal position of the swing scraper assembly is also installed on one side of the front end of the wastewater tank.

[0007] Furthermore, the oscillating scraper assembly includes: A pair of swing arc-shaped frames, with a semi-circular hollow structure, are fixedly mounted on the drive chain. The lower part of the swing arc-shaped frame has a swing groove extending along its arc contour. A fixed base is fixedly installed inside the swing arc-shaped frame; A swing block, which is rotatably connected to the fixed base; A swing plate, which is fixedly installed below the swing block; A swinging component is disposed below the swinging arc frame. The swinging component is located inside the swinging groove and a connecting block is installed thereon. The connecting block is installed below the swinging plate. An arc-shaped spring rod, which has a semi-arc shape, is fixedly installed inside the swing arc frame, and the swing plate is slidably connected to the arc-shaped slide rail of the arc-shaped spring rod; A sliding plate is installed at the end of the fixed base away from the swing block, and the sliding plate extends to the outside of the swing arc frame. A rotating shaft rod fixedly connected to the swing block is installed on the sliding plate. A baffle plate is disposed on the inner side of the wastewater tank and is on the same horizontal plane as the sliding plate; An elastic waterproof bag is fixedly installed in the middle of the baffle plate. A square groove is opened on the side wall of the wastewater tank relative to the position of the baffle plate, and the elastic waterproof bag is installed in the square groove.

[0008] Furthermore, the inner side of the swing arc frame is provided with a pair of arc grooves symmetrically distributed on the front and rear sides of the swing groove, and a ball bearing capable of rolling in the arc groove is installed below the swing plate.

[0009] Furthermore, the spacing adjustment mechanism includes: A spacing frame, which is fixedly installed on the wastewater tank; Spacing blocks are slidably mounted on the spacing frame via slide rails; A positioning block, which is fixedly installed on the spacing block; A spacing plate is slidably mounted on the spacing frame via a slide rail, and the spacing plate has a spacing groove for fitting the positioning block. A pair of fixing brackets are fixedly installed on the spacing bracket; A lead screw, which is rotatable between the pair of fixed brackets; A drive block is threadedly connected to the lead screw, and one end of the drive block is fixedly connected to the spacing plate; A laser rangefinder, mounted on the side of the spacing frame, is used to detect the thickness of the slag on the scraper plate.

[0010] Furthermore, the spacing adjustment mechanism also includes: The first reset block is slidable on the spacing block via a slide rail, and the front end of the drive block is connected to the first reset block; A reset spring is connected between the first reset block and the spacing block; The second reset block has its front end mounted on the spacing plate and its rear end close to the rear end of the first reset block.

[0011] The automatic cleaning mechanism includes: A pair of drive shafts are fixedly installed on the wastewater tank and located above the sludge scraping tank. The sprocket is rotatably mounted on the drive shaft and engages with the drive chain. The cleaning strip is fixedly installed radially inside the cleaning sprocket, and the installation position of the cleaning sprocket corresponds to the position of the scraper plate when it moves with the drive chain toward the inside of the scraper trough.

[0012] Furthermore, the cleaning sprocket is positioned such that the cleaning strip can reach and contact the area at the end of the scraper within the lowest point of its rotation trajectory.

[0013] Furthermore, the outer end of the cleaning strip away from the cleaning sprocket shaft is configured as a pointed structure, and the pointed structure is arranged on the side wall of the scraper plate.

[0014] Furthermore, the top of the swinging arc frame is equipped with symmetrically arranged drip plates, which are configured as isosceles triangles.

[0015] Furthermore, the drip plate is arranged at an outward tilt on the swinging arc frame.

[0016] Compared with existing technologies, the dyeing and printing wastewater recycling device of the present invention has the following advantages: 1. This invention utilizes closed-loop feedback control of a laser rangefinder and a spacing adjustment mechanism, combined with the triggering, energy storage, and release linkage mechanism of the baffle plate, sliding plate, and arc-shaped spring rod in the swing scraper assembly, to adaptively adjust the working angle and operating mode of the scraper plate. This achieves a dual function of flat pushing and shaking scraping in the operational strategy. Specifically, it provides a precise and dynamic response to real-time changes in the thickness and viscosity of the scum layer during actual operation, breaking through the limitations of the traditional fixed scraper's single operating mode. It effectively solves the industry problems of incomplete scraping of thin scum and overloading due to clogging when scum is thick or sticky, significantly improving scum removal efficiency and collection integrity. Furthermore, the instantaneous impact force generated by the rapid forward swing of the scraper plate effectively breaks up and removes slab-formed scum. Simultaneously, the energy required for this action mainly comes from the elastic potential energy stored in the chain's kinetic energy conversion, rather than continuously consuming drive power, which helps reduce the overall energy consumption of the system.

[0017] 2. This invention integrates a reverse shearing cleaning mechanism with a directional flow guide from the isosceles triangular drip plate on the top of the swinging arc frame, constructing a three-dimensional active protection system from the surface of the execution components to the key transmission parts. Utilizing the automatic meshing transmission between the scraper's return stroke and the cleaning sprocket, it achieves forced self-cleaning of the scraper's working surface and sidewall dead corners, ensuring the scraper is in optimal geometric condition before each operation. This overcomes the maintenance bottleneck of traditional equipment relying on manual cleaning during downtime, guaranteeing long-term stability and high efficiency in scraping performance. Furthermore, the drip plate's unique V-shaped flow guide structure forces the slag-containing wastewater discharged during resetting towards the center of the tank, completely blocking the path of wastewater leakage along the scraper's connection gaps into the chain, sprocket, and swinging components. This eliminates faults caused by internal corrosion and jamming at the source, greatly improving the core transmission system's environmental tolerance and operational reliability under harsh working conditions, achieving low-maintenance, long-term continuous and stable operation of the equipment. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the spacing adjustment mechanism of the present invention; Figure 3 This is a schematic diagram of the swing arc frame of the present invention; Figure 4 yes Figure 3A magnified view of part A in the image; Figure 5 yes Figure 2 A magnified view of part B in the image; Figure 6 This is a schematic diagram of the automatic cleaning mechanism of the present invention; Figure 7 This is another schematic diagram of the overall structure of the present invention; Figure 8 yes Figure 6 A magnified view of part C; Figure 9 This is a schematic diagram of the drip plate of the present invention; Figure 10 This is a schematic diagram of the drip plate of the present invention from another angle. The markings in the figure represent: 1. Wastewater tank; 11. Sludge scraping tank; 12. Drive sprocket; 13. Passive sprocket; 14. Drive chain; 15. Drive wheel; 16. Drive chain; 17. Sludge scraping plate; 2. Oscillating sludge scraping assembly; 21. Oscillating arc frame; 210. Oscillating groove; 22. Fixed base; 23. Oscillating block; 24. Oscillating plate; 25. Oscillating component; 26. Arc-shaped spring rod; 27. Sliding plate; 28. Baffle plate; 29. ​​Elastic anti-slip plate. 211. Water bag; 212. Arc groove; 223. Ball bearing; 224. Spacing frame; 225. Spacing block; 226. Positioning block; 227. Spacing plate; 228. Fixing frame; 229. Lead screw; 220. Drive block; 221. First reset block; 222. Reset spring; 2291. Laser rangefinder; 2292. Second reset block; 3. Automatic cleaning mechanism; 30. Drive shaft; 31. Cleaning sprocket; 32. Cleaning strip; 33. Drip plate. Detailed Implementation

[0019] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0020] See Figure 1As shown, the present invention provides a wastewater recycling device for dyeing and printing, including a wastewater tank 1 with a slag scraping tank inside; a slag scraping and conveying mechanism, mounted on the wastewater tank 1, including a drive chain 14 driven by a drive sprocket 12 and a driven sprocket 13, a pair of drive wheels 15 rotating synchronously with the driven sprocket 13, and a drive chain 16 running around the pair of drive wheels 15; a main drive motor is mounted on the wastewater tank 1 via a motor mount for driving the drive sprocket 12 to rotate; and an adaptive slag scraping mechanism including at least one slag scraping plate 17 mounted on the drive chain 16, and an oscillating slag scraping assembly 2 connecting the slag scraping plate 17 and the drive chain 16 for driving the slag scraping plate 17 to reciprocate oscillating motion.

[0021] It is important to note that when the main drive unit starts, its output shaft directly drives the drive sprocket 12 to rotate. The drive sprocket 12 drives the drive chain 14 to move. The drive chain 14 surrounds the driven sprocket 13 to form a closed main transmission loop, which is the core power loop of the entire system. The driven sprocket 13 and the drive sprocket 12 rotate synchronously through the drive chain 14. The shaft of the driven sprocket 13 is rigidly connected to one of a pair of drive wheels 15 through a connecting rod. Therefore, the rotation of the drive wheel 15 is completely synchronized with that of the driven sprocket 13. A drive chain 16 is fitted onto the two drive wheels 15 to form a second closed loop. The track 16 is the running track of the scraper plate 17. Its movement trajectory determines the working path of the scraper plate 17. Usually, the lower half moves horizontally forward, such as in the scraping working section, and the upper half moves horizontally back, such as in the no-load reset section. The swing scraper assembly 2 is set at one position in the lower half of the horizontal forward movement. When the drive chain 16 moves, it drags the entire scraper mechanism along its track. The scraper plate 17 moves horizontally with the drive chain 16, cuts into the scum layer, and removes the scum from the inside of the scraper tank 11. The scraper plate 17 is lifted off the water surface and returns to the starting point with the drive chain 16 without load, preparing for the next cycle, thus realizing the removal of scum.

[0022] See Figures 1-4As shown, the oscillating scraper assembly 2 includes: a pair of oscillating arc-shaped frames 21, with a semi-circular hollow structure, fixedly mounted on the drive chain 16, and an oscillating groove 210 extending along its arc-shaped contour at the lower part of the oscillating arc-shaped frame 21; a fixed base 22, which is fixedly installed inside the oscillating arc-shaped frame 21; an oscillating block 23, which is rotatably connected to the fixed base 22; an oscillating plate 24, which is fixedly installed below the oscillating block 23; an oscillating element 25, which is located below the oscillating arc-shaped frame 21, and a connecting block is installed inside the oscillating groove 210, with the connecting block installed below the oscillating plate 24; and an arc-shaped spring rod 26, which has a semi-circular shape and is fixedly installed inside the oscillating arc-shaped frame 21, with the oscillating plate 24 slidably connected to the arc-shaped frame 21. The spring rod 26 has an arc-shaped slide rail; a sliding plate 27 is installed on the fixed base 22 at the end away from the swing block 23, and the sliding plate 27 extends to the outside of the swing arc frame 21. A rotating shaft rod fixedly connected to the swing block 23 is installed on the sliding plate 27; a baffle plate 28 is set on the inner side of the wastewater tank 1 and is on the same horizontal plane as the sliding plate 27. A drive mechanism for driving the baffle plate 28 to extend and retract is provided on the wastewater tank 1; an elastic waterproof bag 29 is fixedly installed in the middle of the baffle plate 28. A square groove is opened on the side wall of the wastewater tank 1 relative to the position of the baffle plate 28. The elastic waterproof bag 29 is installed in the square groove. By setting the elastic waterproof bag 29, the wastewater inside the wastewater tank 1 is prevented from leaking out, and the spacing of the baffle plates 28 can be changed. It should be noted that when the scraper 17 moves with the drive chain 16 and cuts into the scum layer, the drive mechanism is in a retracted state, the baffle plate 28 retracts and does not interfere with the sliding plate 27. The scraper 17 maintains the optimal initial angle for scraping scum under the elastic force of the arc spring rod 26. This preset angle ensures that the scraper 17 can start working in the most effective shovel posture and efficiently collect the thin layer of scum. When encountering a thick slag layer, the drive mechanism extends the baffle plate 28, and the drive chain 16 continues to advance. When the sliding plate 27 moves to the position of the baffle plate 28, the extended part of the sliding plate 27 contacts the side of the fixed baffle plate 28. Under the action of the forward force of the drive chain 16, the sliding plate 27 is blocked and forced to rotate slightly in the opposite direction around the axis of the fixed seat 22. Since the sliding plate 27 is fixed to the swing block 23 through the rotating shaft, this slight rotation is directly transmitted to the swing block 23, causing it to rotate synchronously in the opposite direction. This rotation immediately causes the scraper plate 17 to swing backward at a slight angle, storing more elastic potential energy, and ultimately causing the scraper plate 17 to swing backward at an angle, that is, the scraper plate 17 slightly lifts away from the slag or changes the cutting angle. At the same time, the swing... Plate 24 slides backward within the slide of the arc-shaped spring rod 26, compressing the arc-shaped spring rod 26 and storing elastic potential energy. As the chain continues to move forward, after the sliding plate 27 passes the baffle plate 28, the external obstruction disappears. At this time, the compressed arc-shaped spring rod 26 releases the stored elastic potential energy, pushing the swing plate 24 to slide forward rapidly along the arc-shaped slide. The swing plate 24 drives the swing block 23 to rotate in the forward direction, and the swing component 25 drives the scraper plate 17 to swing forward rapidly and reset. This rapid forward swing causes the scraper plate 17 to produce a forward and downward shoveling or shaking action on the scum, which can more effectively scrape up and push the thick or firmly adhered scum forward. If the baffle plate 28 remains extended, the scraper plate 17 will repeat the swing action once when passing each baffle plate 28.

[0023] It should be noted that the arc-shaped spring rod 26 is equipped with a damper. The damper absorbs part of the kinetic energy and controls the speed, so that the scraper 17 can smoothly cut into the liquid surface and scum layer, achieving more effective scraping rather than slapping.

[0024] This invention dynamically adjusts the working posture of the scraper plate 17 by triggering the contact between the baffle plate 28 and the sliding plate 27, and by coordinating the energy storage and release between the swing block 23 and the arc-shaped spring rod 26. This enables an adaptive switching of the scraping operation mode in both time and space. On the one hand, it provides a precise and efficient response to the variations in the thickness and viscosity of the scum layer during actual operation, breaking through the limitations of the traditional single flat push of the scraper. It forms a dual-mode synergy of flat push and shaking scraping, significantly improving the efficiency of scum removal and collection, and reducing the probability of scraper blockage and equipment overload. On the other hand, it utilizes the forward kinetic energy of the chain to convert into elastic potential energy and release it instantaneously, achieving explosive cleaning of thick scum. This helps reduce the continuous consumption of driving force, while enhancing the penetration and cleanliness of the scraping action. This helps maintain the long-term operating efficiency of the scraper plate 17 and the stability of system operation, and extends the service life of key components.

[0025] See Figure 4As shown, the inner side of the swing arc frame 21 is provided with a pair of arc grooves 211 symmetrically distributed on the front and rear sides of the swing groove 210, and a ball bearing 212 that can roll in the arc groove 211 is installed below the swing plate 24.

[0026] It should be noted that when the swing plate 24 swings, its lower end will generate relative movement on the inner side of the swing arc frame 21. Here, it will be direct sliding friction between metals. After adding the ball bearing 212, the sliding friction becomes rolling friction, and the friction force is greatly reduced. This makes the swing block 23 more sensitive and smooth when triggering rotation and spring reset, avoiding the action jamming, sluggishness or energy loss caused by excessive frictional resistance. It ensures the response speed and force of the energy storage and release process. Moreover, the ball bearing 212 is constrained to roll within the arc groove 211, which is equivalent to adding a precise track guide to the lower end of the swing plate 24. It ensures that the movement trajectory of the swing plate 24 is strictly controllable and stable throughout the entire swing process, and there will be no left-right swaying or up-down jumping.

[0027] It is worth noting that when the slag scraper 17 is in operation, especially when it is performing a shaking scraping action, the swing plate 24 will be subjected to a large lateral force and torque from the resistance of the slag. After adding the pair of balls 212 and arc groove 211, they form an auxiliary, rigid support point, which together with the arc spring rod 26 forms a stable two-point support knot, sharing the load. This greatly reduces the burden on the arc spring rod 26, protects the most core and precise elastic energy storage element in this mechanism, and improves the structural rigidity and durability of the entire system.

[0028] See Figures 2-5 As shown, a spacing adjustment mechanism for adjusting the overall horizontal position of the swing scraper assembly 2 is also installed on one side of the front end of the wastewater tank 1. The spacing adjustment mechanism includes: a spacing frame 221, which is fixedly installed on the wastewater tank 1; a spacing block 222, which is slidably installed on the spacing frame 221 via a slide rail; a positioning block 223, which is fixedly installed on the spacing block 222; and a spacing plate 224, which is slidably installed on the spacing frame 221 via a slide rail. The spacing plate 224 has a formwork for fitting the positioning block 223. The system includes: a spacing groove; a pair of fixed brackets 225 fixedly mounted on the spacing bracket 221; a lead screw 226 rotatable between the pair of fixed brackets 225, with a drive mechanism mounted on one of the fixed brackets 225 for driving the lead screw 226 to rotate, such as a servo motor; a drive block 227 threadedly connected to the lead screw 226, with one end of the drive block 227 fixedly connected to the spacing plate 224; and a laser rangefinder 2291 mounted on the side of the spacing bracket 221 for detecting the thickness of the slag on the scraper plate 17.

[0029] It should be noted that the laser rangefinder 2291 continuously monitors the thickness H of the scum. The control system has one or more preset thickness thresholds, such as: threshold T, such as 10mm: thin scum layer, no need to trigger the swing; threshold T, such as 20mm: thick scum layer, swing needs to be triggered. When the system detects that H>T, it determines that the current condition is thick scum and the swing mode needs to be activated. The control system sends a command to the drive mechanism of the spacing adjustment mechanism. The servo motor drives the lead screw 226 to rotate. The drive block 227, which is threaded with the lead screw 226, produces a precise linear motion along the axis of the lead screw 226. The drive block 227 is fixedly connected to the spacing plate 224, so it drives the spacing plate 224 to move together. The spacing plate 224 has a spacing groove, and the positioning block 223 is fitted in the groove. This design is key: the direction of the spacing groove is at an angle to the direction of movement of the lead screw 226. When the spacing plate 224 is pushed horizontally by the lead screw 226 system, the positioning block 223 is forcibly guided by the inclined or curved contour of the spacing groove, and it will simultaneously generate a precisely calculated displacement in the vertical direction. The spacing block 222 is fixed to the positioning block 223 and is mounted on the spacing frame 221 by the slide rail. Therefore, the spacing block 222, together with the baffle plate 28 fixed on it, moves vertically up and down under the constraint of the slide rail. When it is necessary to trigger the swing, the drive mechanism drives the baffle plate 28 to precisely descend to the working position so that it can just contact the side of the sliding plate 27 that it passes. Moreover, the baffle plate 28 can be extended by different thickness values ​​to adapt to the cleaning of scum of different thicknesses. When it is necessary to stop the swing, the drive mechanism drives the baffle plate 28 to precisely rise and retract, completely avoiding the movement path of the sliding plate 27. The laser rangefinder 2291 continues to monitor the effect of slag scraping and the change in slag thickness. If the thickness does not decrease, the system can even further fine-tune the depth of the baffle 28, thereby increasing the rotation angle of the swing block 23 and the compression of the arc spring rod 26, making the scraping action of the scraper 17 more intense to deal with more stubborn slag. According to the real-time slag condition, it seamlessly and automatically switches between the efficient flat pushing mode and the powerful scraping mode, truly realizing the intelligentization of slag scraping operation. Moreover, by adjusting the position of the baffle 28, the swing amplitude can be precisely controlled. For general thick slag, the standard swing amplitude can be used. For sludge that is hardened and highly viscous, the depth of penetration can be increased to trigger a larger backswing, thereby storing and releasing more energy, achieving super-strong scraping, and greatly improving the upper limit of processing capacity.

[0030] It is worth noting that the more energy-intensive oscillation mode is only activated when the slag thickness reaches a certain value, thus avoiding wasted effort when the slag thickness is thin and saving the equipment from additional mechanical load and energy loss caused by frequent oscillation.

[0031] See Figures 2-4As shown, the spacing adjustment mechanism further includes: a first reset block 228, which is slidable on the spacing block 222 via a slide rail, and the front end of the driving block 227 is connected to the first reset block 228; a reset spring 229, which is connected between the first reset block 228 and the spacing block 222; and a second reset block 2292, whose front end is mounted on the spacing plate 224 and whose rear end is close to the rear end of the first reset block 228.

[0032] It should be noted that the rear ends of the first reset block 228 and the second reset block 2292 are tightly fitted together, and the reset spring 229 has a certain initial preload, keeping the baffle plate 28 at a fixed extension height. The control system calculates the need to increase the trigger spacing based on requirements, such as thickening of the scum, which means increasing the extension of the baffle plate 28. The drive motor starts, the lead screw 226 rotates, and the drive block 227 moves a distance behind the wastewater tank 1. Since the drive block 227 simultaneously engages with the spacing plate 224 and the front of the first reset block 228... The end connection attempts to move both simultaneously. The spacing plate 224 responds immediately, moving backward. The second reset block 2292, fixed to the spacing plate 224, also moves backward synchronously. The rear end of the second reset block 2292 then presses against and pushes the rear end of the first reset block 228, forcing the first reset block 228 to overcome all resistance and move backward synchronously. This eliminates any possible gaps or response delays in the transmission chain, ensuring that the displacement of the first reset block 228 is synchronized with the distance from the spacing plate 224, which acts as the command source. The displacement is absolutely synchronized. Therefore, the movement of the spacing block 222 causes the baffle plate 28 to extend, increasing the extension amount and the spacing. This invention uses the forced pushing and tight fit between the second reset block 2292 and the first reset block 228, as well as the setting and utilization of the initial preload of the reset spring 229, to adjust the extension height of the baffle plate 28 in a coordinated manner. This achieves a precise controllable timing pattern for the swing trigger spacing of the slag scraper 17. On the one hand, it provides a real-time and adaptive response to the dynamic changes in the thickness and properties of the slag layer during actual operation, breaking through the limitations of the fixed frequency and amplitude operation of the traditional slag scraper 17. By adjusting the trigger timing, it achieves early intervention and powerful cleaning of the thick slag layer, significantly improving the slag stripping efficiency. On the other hand, by utilizing the compliant characteristics of spring transmission, it transforms rigid drive into controlled elastic drive, which helps reduce mechanical impact and transmission wear, while ensuring the long-term stability and repeatability of the baffle plate 28 positioning. This helps maintain the operating efficiency and reliability of the slag scraping system under different working conditions and extends the service life of key moving parts.

[0033] See Figures 6-8As shown, the automatic cleaning mechanism 3 is fixed on the wastewater tank 1 and located above the slag scraping tank 11. It is used to automatically scrape off the residual scum adhering to the surface of the slag scraping plate 17 when the slag scraping plate 17 moves along the drive chain 16. The automatic cleaning mechanism 3 includes: a pair of drive shafts 30, which are fixedly installed on the wastewater tank 1 and located above the slag scraping tank 11; a cleaning sprocket 31, which is rotatably sleeved on the drive shafts 30 and meshes with the drive chain 14; and a cleaning strip 32, which is radially fixedly installed inside the cleaning sprocket 31. The installation position of the cleaning sprocket 31 corresponds to the position of the slag scraping plate 17 when it moves along the drive chain 16 towards the inside of the slag scraping tank 11.

[0034] It should be noted that when the motor drives the drive sprocket 12 to rotate in the opposite direction, the counterclockwise rotation of the drive sprocket 12 will also drive the drive chain 14 meshed with it to run in the opposite direction in sync. The drive chain 14 then drives the passive sprocket 13 to rotate in the opposite direction. The active chain 16, which meshes with the drive chain 14, begins to run in the opposite direction to the normal slag scraping direction under the drive of the sprocket assembly. The slag scraper 17, which is fixed on the active chain 16, moves upward from the bottom of the slag scraping trough 11, preparing to return to the starting point to start the next slag scraping cycle. At this time, there may be residual slag with high viscosity that has not been completely removed on the working surface of the slag scraper 17. The cleaning sprocket 31 meshes directly with the drive chain 14. Therefore, when the drive chain 14 runs in the opposite direction, it will drive the cleaning sprocket 31 to rotate. The key point is the installation position. The cleaning sprocket 31 is set below the drive chain 14. When the drive chain 14 runs in the opposite direction, the running direction of its lower end is to the left. The cleaning sprocket 31, which meshes with this lower end, will rotate in the same direction. The cleaning strip 32 is radially fixed inside the cleaning sprocket 31 and rotates with the sprocket. Its outer end forms a circular motion trajectory, so that when the scraper 17 moves upward with the drive chain 16 to a specific position above the scraper trough 11, it just happens to intersect with the cleaning strip 32, which has rotated to the lowest point, in space. The scraper 17 moves upward; the cleaning strip 32 moves forward and downward near the lowest point. Since the rotation speed of the cleaning sprocket 31 matches the chain speed, the linear speed of the end of the cleaning strip 32 is comparable to the movement speed of the scraper 17, but in a different direction. This relative movement with opposite directions or at an angle generates a strong shearing and scraping effect when the cleaning strip 32 contacts the surface of the scraper 17. Using the shearing force of the relative movement, the sticky scum, oil stains and other hard residues attached to the working surface and sides of the scraper 17 are scraped off and peeled off. The scraped residue will fall back to the area of ​​the scraper trough 11 below and be removed with the next scraping cycle.

[0035] Without manual intervention or additional start / stop control, cleaning is performed automatically as soon as the system executes the return action. This ensures that the scraper blade 17 is clean when each scraping operation begins, thus maintaining the best and most stable scraping performance.

[0036] See Figure 8 As shown, the cleaning sprocket 31 is positioned such that the cleaning strip 32 can reach and contact the area at the end of the scraper 17 within the lowest point of its rotation trajectory.

[0037] The fact that the cleaning strip 32 can reach this area means that from the end of the scraper plate 17 and the drive mechanism to its tail end, the entire plate surface is within the scraping range of the cleaning strip 32, achieving cleaning without dead angles and full coverage. Maintaining cleanliness from end to tail end ensures that the designed geometry and hydrodynamic characteristics of the scraper plate 17 remain consistent every time it is used, thereby ensuring stable scraping effect.

[0038] See Figure 8 As shown, the outer end of the cleaning strip 32 away from the axis of the cleaning sprocket 31 is configured as a pointed structure, and the pointed structure is arranged on the side wall of the scraper plate 17.

[0039] It provides a targeted structural response to stubborn scum adhering to the sidewall edge of the scraper blade 17 in actual operation, breaking through the limitations of traditional planar scraper blades in cleaning. The pointed structure forms a local high-pressure line contact or point contact, which can wedge into and pry open the scum at the joint of the plate wall, significantly improving the cleaning penetration and stripping efficiency of edge dead corner areas, and reducing the probability of long-term accumulation of scum on the sidewall.

[0040] See Figures 9-10 As shown, the top of the swing arc frame 21 is equipped with symmetrically arranged drip plates 33. The drip plates 33 are set as isosceles triangles and are arranged outwards on the swing arc frame 21.

[0041] This invention constructs a V-shaped directional flow guiding structure by symmetrically arranging outward-inclined isosceles triangular drip plates 33 on the top of the swinging arc frame 21. This structure provides forced path management for the wastewater containing slag that flows down when the scraper plate 17 resets. This design utilizes the unique fluid collection characteristics of the isosceles triangular inclined surface, combined with its outward-inclined installation posture, to allow the wastewater to automatically converge towards the midpoint of the bottom edge under the action of gravity, and finally be guided to the central liquid surface of the wastewater tank 1 for concentrated fall. This completely blocks the path of wastewater splashing to both sides or seeping into the transmission sprocket, chain and swinging components through the connection gap of the scraper plate 17, fundamentally eliminating failures caused by internal corrosion and jamming, significantly improving the environmental protection level and operational reliability of the core transmission system, and achieving maintenance-free long-term operation.

[0042] Working principle: When using a dyeing and printing wastewater recycling device, follow these steps: When the main drive motor starts, it drives the drive sprocket 12 to rotate, which in turn drives the driven sprocket 13 to rotate synchronously via the drive chain 14. The driven sprocket 13 is rigidly connected to one of the pair of drive wheels 15 via a shaft, so that the two drive wheels 15 rotate synchronously. The drive chain 16 surrounding the drive wheel 15 forms the running track of the scraper plate 17. When the drive chain 16 moves, the swing scraper assembly 2 fixed on it drives the scraper plate 17 to move along the track. In the scraping working section, the scraper plate 17 horizontally cuts into the scum layer and pushes the scum out of the scraper trough 11. When the scum layer is thin, the control mechanism retracts the baffle plate 28, and the scum scraper 17 maintains a fixed tilt angle under the elastic force of the arc spring rod 26, and performs pure translational pushing scraping of scum. When a thick slag layer is detected, the control mechanism drives the spacing adjustment mechanism to extend the baffle plate 28 to the working position. The slag scraping assembly that moves forward with the drive chain 16 has its side sliding plate 27 in contact with the side of the fixed baffle plate 28. Under the action of the chain's forward force, the blocked sliding plate 27 produces a small reverse rotation around the axis of the fixed seat 22. The rotation of the sliding plate 27 is directly transmitted to the swing block 23 through the rotating shaft fixed to it, so that the swing block 23 rotates synchronously in the opposite direction. The rotation of the swing block 23 drives the swing plate 24 below it to slide backward along the slide of the arc spring rod 26 fixed in the swing arc frame 21, thereby compressing the arc spring rod 26 and converting part of the kinetic energy of the chain forward into the elastic potential energy of the spring for storage. At the same time, the scraper plate 17 linked with the swing block 23 swings backward at an angle. When the sliding plate 27 passes the baffle plate 28, the obstruction is released, and the compressed arc spring rod 26 immediately releases the stored elastic potential energy, pushing the swing plate 24 to slide forward quickly along its arc slide. The swing plate 24 drives the swing block 23 to rotate in the positive direction, and finally drives the scraper plate 17 to swing forward and downward quickly to reset through the swing component 25. The spacing adjustment mechanism drives the spacing plate 224 to move horizontally via the lead screw 226. By utilizing the cooperation between the inclined spacing groove on the spacing plate 224 and the positioning block 223, the horizontal displacement is converted into the vertical lifting and lowering of the spacing block 222, thereby precisely controlling the extension height of the baffle plate 28. The greater the extension height, the longer the travel of the sliding plate 27 is blocked, the greater the rotation angle of the swing block 23, and the greater the spring compression and the final release of the shaking force. When the scraper 17 finishes scraping the slag and returns unloaded with the drive chain 16, the cleaning sprocket 31, which meshes with the drive chain 14 running in the opposite direction, is driven to rotate. The rotating cleaning bar 32 intersects the surface of the upward scraper 17 at the lowest point of its trajectory. By using the relative motion in opposite directions, the residual slag attached to the surface and sidewall of the scraper 17 is scraped off. The isosceles triangular drip plate 33 installed on the top of the swing arc frame 21 is arranged symmetrically with an outward tilt. When the scraper plate 17 is reset, the sewage dripping is intercepted by the inclined surface of the drip plate 33 and flows along the inclined surface to the central liquid surface of the wastewater tank 1, preventing sewage from seeping into the transmission components below.

[0043] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A device for recycling and reusing dyeing and printing wastewater, comprising a wastewater tank (1), characterized in that... Its interior is equipped with a slag scraping trough (11). The slag scraping and conveying mechanism is mounted on the wastewater tank (1) and includes a drive chain (14) driven by a drive sprocket (12) and a passive sprocket (13), a pair of drive wheels (15) that rotate synchronously with the passive sprocket (13), and a drive chain (16) that runs around the pair of drive wheels (15). The adaptive scraping mechanism includes at least one scraper plate (17) mounted on the drive chain (16), and a swing scraper assembly (2) connecting the scraper plate (17) and the drive chain (16) for driving the scraper plate (17) to reciprocate swing motion. Automatic cleaning mechanism (3) is fixed on the wastewater tank (1) and located above the slag scraping tank (11). It is used to automatically scrape off the residual slag attached to the surface of the slag scraping plate (17) when the slag scraping plate (17) passes by with the active chain (16). The wastewater tank (1) is also equipped with a spacing adjustment mechanism for adjusting the overall horizontal position of the swing scraper assembly (2).

2. The dyeing and printing wastewater recycling device according to claim 1, characterized in that, The oscillating scraper assembly (2) includes: A pair of swing arc frames (21), with a semi-circular hollow structure, are fixedly mounted on the drive chain (16). The lower part of the swing arc frame (21) is provided with a swing groove (210) extending along its arc contour. The fixed base (22) is fixedly installed inside the swing arc frame (21); A swing block (23) is rotatably connected to the fixed base (22); A swing plate (24) is fixedly installed below the swing block (23); A swinging component (25) is disposed below the swinging arc frame (21). The swinging component (25) is located inside the swinging groove (210) and a connecting block is installed thereon. The connecting block is installed below the swinging plate (24). The arc-shaped spring rod (26) has a semi-arc shape and is fixedly installed inside the swing arc frame (21). The swing plate (24) is slidably connected to the arc-shaped slide of the arc-shaped spring rod (26). A sliding plate (27) is installed at one end of the fixed base (22) away from the swing block (23), and the sliding plate (27) extends to the outside of the swing arc frame (21). A rotating shaft rod fixedly connected to the swing block (23) is installed on the sliding plate (27). A baffle plate (28) is disposed on the inner side of the wastewater tank (1) and is on the same horizontal plane as the sliding plate (27); An elastic waterproof bag (29) is fixedly installed in the middle of the baffle plate (28). A square groove is provided on the side wall of the wastewater tank (1) at the position relative to the baffle plate (28), and the elastic waterproof bag (29) is installed in the square groove.

3. The dyeing and printing wastewater recycling device according to claim 2, characterized in that, The inner side of the swing arc frame (21) is provided with a pair of arc grooves (211) symmetrically distributed on the front and rear sides of the swing groove (210), and a ball (212) that can roll in the arc groove (211) is installed below the swing plate (24).

4. The dyeing and printing wastewater recycling device according to claim 3, characterized in that, The spacing adjustment mechanism includes: Spacing frame (221) is fixedly installed on the wastewater tank (1); Spacing block (222), which is slidably mounted on the spacing frame (221) via a slide rail; The positioning block (223) is fixedly installed on the spacing block (222); A spacing plate (224) is slidably mounted on the spacing frame (221) via a slide rail. The spacing plate (224) has a spacing groove for fitting the positioning block (223). A pair of fixing brackets (225) are fixedly mounted on the spacing bracket (221); A lead screw (226) rotatable between the pair of fixed brackets (225); A drive block (227) is threadedly connected to the lead screw (226), and one end of the drive block (227) is fixedly connected to the spacing plate (224); A laser rangefinder (2291), which is mounted on the side of the spacing frame (221), is used to detect the thickness of the slag on the scraper plate (17).

5. The dyeing and printing wastewater recycling device according to claim 4, characterized in that, The spacing adjustment mechanism further includes: The first reset block (228) is slidable on the spacing block (222) via a slide rail, and the front end of the driving block (227) is connected to the first reset block (228); A reset spring (229) is connected between the first reset block (228) and the spacing block (222); The second reset block (2292) has its front end mounted on the spacing plate (224) and its rear end close to the rear end of the first reset block (228).

6. The dyeing and printing wastewater recycling device according to claim 2, characterized in that, The automatic cleaning mechanism (3) includes: A pair of drive shafts (30) are fixedly installed on the wastewater tank (1) and located above the sludge scraper tank (11); Clean the sprocket (31), which is rotatably mounted on the drive shaft (30) and meshes with the drive chain (14); The cleaning strip (32) is fixedly installed in the interior of the cleaning sprocket (31) along the radial direction. The installation position of the cleaning sprocket (31) corresponds to the position of the scraper plate (17) when it runs with the drive chain (16) towards the interior of the scraper trough (11).

7. The dyeing and printing wastewater recycling device according to claim 6, characterized in that, The cleaning sprocket (31) is positioned such that the cleaning strip (32) can reach and contact the area at the end of the scraper (17) within the lowest point of its rotation trajectory.

8. The dyeing and printing wastewater recycling device according to claim 6, characterized in that, The outer end of the cleaning strip (32) away from the axis of the cleaning sprocket (31) is provided with a pointed structure, and the pointed structure is arranged on the side wall of the scraper plate (17).

9. The dyeing and printing wastewater recycling device according to claim 7, characterized in that, The top of the swinging arc frame (21) is equipped with symmetrically arranged drip plates (33), which are set as isosceles triangles.

10. The dyeing and printing wastewater recycling device according to claim 9, characterized in that, The drip plate (33) is arranged on the swing arc frame (21) with its surface tilted outward.

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