A printing and dyeing wastewater recycling and regenerating treatment device

Abstract

This invention discloses a wastewater recycling and regeneration treatment device for dyeing and printing wastewater. The invention relates to the field of dyeing and printing wastewater technology. It includes a filter tank, a hydrolysis acidification tank, an aerobic tank, a decolorization tank, and a filter screen, scraping assembly, unblocking assembly, and layered cover inside the filter tank. The invention uses a first motor to rotate and adjust the filter screen via forward and reverse rotation. A moving push plate assembly rotates with a first belt, and a limiting assembly guides the scraping assembly. A scraper on a second belt scrapes away large particles of impurities accumulated on the filter screen surface and pushes them into an extension cavity for collection. Simultaneously, the unblocking assembly, driven by a threaded section of a first output shaft, drives unblocking columns to insert into the filter holes from bottom to top, preventing the accumulation of flexible impurities such as thread ends. Impurity cleaning and filter screen unblocking can be completed without manual intervention, ensuring smooth filtration and improving wastewater filtration efficiency.

Description

Technical Field

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

[0002] After large particulate impurities are removed by a filtration tank, the dyeing and printing wastewater enters a coagulation reaction tank where chemicals are added to form flocs. This step removes some color, organic matter, and suspended solids from the wastewater. Subsequently, solid-liquid separation is completed in a sedimentation tank, and the supernatant is pumped to a hydrolysis acidification tank. Microorganisms in the tank break down long-chain organic matter into short chains and convert recalcitrant substances into readily biodegradable substances to improve the biodegradability of the wastewater. The treated wastewater then enters an aerobic biological treatment tank, where aeration provides oxygen to aerobic microorganisms, which metabolize and decompose most of the remaining organic matter in the wastewater. Finally, the wastewater enters a decolorization tank where specialized chemicals are added to remove residual color, thus completing the dyeing and printing wastewater treatment process.

[0003] When treating dyeing and printing wastewater, existing filter tanks typically rely on internal filter screens to remove fiber ends that are difficult to remove with conventional chemical agents. However, during long-term continuous filtration, a large amount of fiber ends and suspended solids gradually adhere to and accumulate on the surface of the filter screen, easily causing clogging of the mesh and affecting water flow efficiency and treatment effect. Currently, the conventional cleaning method is to manually disassemble and clean the filter screen. This method not only requires shutdown, affecting the continuous operation of the wastewater treatment system, but also suffers from high labor intensity, low operating efficiency, and high maintenance costs. In addition, manual operation also poses certain safety hazards.

[0004] Furthermore, in the sedimentation process, the sludge and flocculated sediments deposited at the bottom of the sedimentation tank are easily affected by water flow disturbance. Some fine sediments may float to the surface with the water flow or be carried by the water flow and discharged together with the treated dyeing and printing wastewater, resulting in excessive suspended solids in the effluent, causing secondary pollution and reducing the overall treatment effect. Therefore, traditional treatment methods have obvious defects and are difficult to meet the actual needs of stable, efficient and continuous operation.

[0005] To address these issues, we designed a wastewater recycling and regeneration treatment device for dyeing and printing. Summary of the Invention

[0006] To address the above issues and overcome the shortcomings of existing technologies, this invention provides a wastewater recycling and regeneration treatment device for dyeing and printing wastewater. First, the filter screen is divided into a filtration zone and a cleaning zone. A transmission device drives the filter screen to operate, enabling simultaneous filtration and cleaning to ensure continuous and uninterrupted wastewater treatment. Simultaneously, a scraping assembly automatically cleans the screen surface in the cleaning zone, promptly removing accumulated threads and impurities without requiring manual disassembly and cleaning. Second, a vertically movable layered cover is installed within the sedimentation tank. This cover moves downwards to cover the sludge and flocculated sediment at the bottom, reducing the impact of water flow disturbance on the sediment and preventing fine sediment from flowing out with the treated wastewater, thus preventing secondary pollution of the effluent.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A wastewater recycling and regeneration treatment device for dyeing and printing includes: a filter tank, a hydrolysis acidification tank, an aerobic tank, and a decolorization tank; the filter tank, the hydrolysis acidification tank, the aerobic tank, and the decolorization tank are connected by a connecting pipe; a filter screen is installed inside the filter tank, and the filter screen is connected to the first output shaft of a first motor; The filter tank has an extended cavity on one side of its upper end; the filter tank has an inlet pipe at the top, which corresponds to a part of the filter screen; the filter tank is divided into two chambers along the middle, namely a large particle impurity screening chamber and a wastewater sedimentation chamber; a scraping group is provided on the top surface of a part of the filter screen to remove large particle impurities from the top surface of the filter screen.

[0008] In one embodiment, both the hydrolysis acidification tank and the aerobic tank are filled with multiple layers of biological packing material.

[0009] In one embodiment, the lower end of the filter tank adopts a funnel-shaped structure design, and the lower end of the funnel is connected to a sewage discharge pipe; an installation plate is fixedly provided in the middle of the filter tank; a first dosing tank is provided on one side of the filter tank, which is connected to the wastewater sedimentation chamber to add flocculant and decolorizing agent into the sedimentation chamber.

[0010] In one embodiment, the scraping assembly includes a second belt and scrapers; the second belt is disposed above the filter screen, and the other end of the second belt extends into the interior of the extension cavity, and a plurality of scrapers are fixedly mounted on the second belt at equal intervals.

[0011] In one embodiment, a first motor is fixedly installed on the top surface of the filter tank. The first output shaft of the first motor extends downward into the interior of the filter tank and is rotatably connected to the mounting plate. The filter screen is connected to the first output shaft through a first one-way bearing, and the first one-way bearing is set to lock the transmission direction in the clockwise direction. The outer edge of the filter screen fits against the inner wall of the filter tank, with a reasonable fit gap between them and forming a certain frictional resistance. The filter tank is also equipped with a transmission device, a limiting group, and a clearing group.

[0012] In one embodiment, the transmission device is located above the filter screen. The transmission device mainly consists of a first belt, pulleys, and movable push plate assemblies. Pulleys are respectively installed at both ends of the first belt. One pulley is connected to the first output shaft through a second one-way bearing. The second one-way bearing is set to rotate counterclockwise as the transmission direction. The other end of the first belt extends into the extension cavity. Multiple movable push plate assemblies are evenly installed at equal intervals along the outer wall of the first belt.

[0013] In one embodiment, the movable push plate assembly specifically includes a sliding sleeve, a sliding plate, a push plate, and a slider; wherein the sliding sleeve is fixedly connected to the first belt, the sliding plate is connected to the sliding sleeve by a sliding engagement, and an elastic element is provided at the sliding engagement part between the two; the push plate is fixedly disposed at the lower end of the sliding plate and extends vertically downward.

[0014] In one embodiment, the limiting assembly includes a limiting plate, a connecting rod, and a fixing rod; the limiting plate is vertically arranged on one side of the transmission device; the limiting plate has an inclined groove and a horizontal groove, which are connected end to end; the connecting rod reinforces the limiting plate as a whole; and the fixing rod is used to fix the limiting plate inside the filter tank.

[0015] In one embodiment, the unblocking assembly is located at the lower end of the filter screen. The unblocking assembly includes an assembly plate, a first nut, a third one-way bearing, unblocking columns, and a limiting column. The middle part of the assembly plate is connected to the first nut through the third one-way bearing. The lower end of the first output shaft has a threaded section, and the first nut meshes with the threaded section. Multiple unblocking columns are evenly arranged on the top surface of one end of the assembly plate. The limiting column is vertically fixed on the mounting plate, and the other end of the assembly plate slides with the limiting column. A first spring is nested on the limiting column, and the lower end of the first spring abuts against the assembly plate. When the threaded section rotates counterclockwise with the first output shaft, the first nut drives the assembly plate to move upward through the third one-way bearing.

[0016] In one embodiment, a third motor is fixedly installed on the top surface of the decolorizing tank, and the output shaft of the third motor extends vertically downward into the interior of the decolorizing tank. Multiple stirring rods are evenly installed on the output shaft. The decolorizing tank is connected to a drainage pipe, and a second sewage pipe is connected to the bottom of the tank. The decolorizing tank is also connected to a second dosing tank.

[0017] In one embodiment, the lower end of the filter tank is provided with a layered cover and a guide assembly. A second motor is fixedly installed on the bottom surface of the filter tank, and the output end of the second motor is connected to a second screw. The upper end of the second screw is rotatably connected to the mounting plate. A second nut is fixedly installed at the axial center of the layered cover, and the second nut and the second screw are nested together. Multiple blades are evenly distributed on the layered cover. The guide assembly includes a mounting base, a rotating ring, a guide post, and a friction plate. The mounting base is fixedly connected to the inner wall of the filter tank. The rotating ring is nested in the inner ring of the mounting base and is rotatably connected to the mounting base. The guide post is vertically arranged and slidably connected to the rotating ring. The friction plate is fixedly installed on the upper end of the guide post. A second spring is provided between the friction plate and the rotating ring. A push ring is also fixedly installed on the guide post, and the diameter of the push ring is larger than the diameter of the guide post. The guide post penetrates downward through the layered cover, and the push ring is located above the layered cover. In the initial state, the friction plate is tightly abutted against the top surface of the mounting base by the elastic force of the second spring.

[0018] The beneficial effects of this invention are as follows: (1) The present invention drives the filter screen to rotate and adjust by the forward and reverse rotation of the first motor. The moving push plate group moves with the first belt and, in conjunction with the guide of the limit group slide groove, pushes the scraping group to move. The scraper on the second belt scrapes away the large particles of impurities accumulated on the surface of the filter screen and pushes them to the extension cavity for centralized storage. At the same time, the unblocking group drives the unblocking column to be inserted into the filter hole from bottom to top through the threaded section of the first output shaft to unblock the filter screen, avoiding the blockage of flexible impurities such as wire ends. Impurity cleaning and filter screen unblocking can be completed without manual intervention, ensuring smooth filtration of the filter screen and improving the wastewater filtration efficiency.

[0019] (2) After the reagent is added, the second motor drives the second screw to move the layered cover upward to release the rotation limit. The layered cover rotates with the screw and uses the blades to fully stir and mix the reagent and wastewater, ensuring that the flocculation and preliminary decolorization reaction are complete. After sedimentation, the layered cover moves downward to cover the sediment at the bottom of the tank and is fixed in position with the guide group friction limit to prevent water flow disturbance from causing the sediment to rise and to prevent impurities from entering the subsequent treatment unit with the effluent. This not only improves the reagent reaction effect but also ensures the quality of the effluent after preliminary treatment, laying a good foundation for subsequent wastewater biochemical treatment. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the filter tank of the present invention; Figure 3 This is a schematic diagram of the transmission device structure of the present invention; Figure 4 This is a schematic diagram of the movable push plate assembly structure of the present invention; Figure 5 This is a schematic diagram of the limiting assembly structure of the present invention; Figure 6 This is a schematic diagram of the upper structure of the filter tank; Figure 7 This is a schematic diagram of the middle structure of the filter tank of the present invention; Figure 8 This is a schematic diagram of the internal structure of the decolorization tank of the present invention; Figure 9 This is a schematic diagram of the lower structure of the filter tank of the present invention; Figure 10 This is a schematic diagram of the guide assembly structure of the present invention.

[0021] In the diagram: 10. Filter tank; 101. Extension cavity; 102. Inlet pipe; 104. Drain pipe; 105. First dosing tank; 106. Mounting plate; 20. Hydrolysis acidification tank; 30. Aerobic tank; 40. Decolorization tank; 50. Connecting pipe; 1. Filter screen; 2. First motor; 21. First output shaft; 22. Threaded section; 3. Transmission device; 31. First belt; 32. Pulley; 33. Moving push plate assembly; 331. Sliding sleeve; 332. Slide plate; 333. Push plate; 334. Slider; 4. Limiting assembly; 41. Limiting plate; 411. Inclined slide groove; 412. Horizontal slide groove 42. Groove; 43. Connecting rod; 44. Fixing rod; 5. Scraping assembly; 51. Second belt; 52. Scraper; 6. Unblocking assembly; 61. Assembly plate; 62. First nut; 63. Third one-way bearing; 64. Unblocking column; 65. Limiting column; 7. Layered cover; 72. Second nut; 73. Blade; 8. Second motor; 81. Second screw; 9. Guide assembly; 91. Mounting base; 92. Rotating ring; 93. Guide column; 94. Friction plate; 931. Push ring; 401. Third motor; 402. Stirring rod; 403. Drainage pipe; 404. Second sewage pipe; 405. Second dosing box. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments. The embodiments of the present invention include, but are not limited to, the following embodiments.

[0023] First embodiment: Please refer to Figure 1 The present invention discloses a wastewater recycling and regeneration treatment device for dyeing and printing, comprising: a filter tank 10, a hydrolysis acidification tank 20, an aerobic tank 30, and a decolorization tank 40; Please see Figure 1The filter tank 10, hydrolysis acidification tank 20, aerobic tank 30, and decolorization tank 40 are connected in series via connecting pipes 50. Each section of the connecting pipe 50 is equipped with a pump, which provides stable power for the transport of wastewater between the treatment units, ensuring that the wastewater can flow in an orderly manner according to the preset process. The wastewater to be treated first enters the filter tank 10, where large particulate impurities such as lint, fiber, and debris are removed through physical interception to prevent blockage in subsequent treatment units. At the same time, appropriate flocculants and decolorizing agents are added to the filter tank 10 to cause colloids and fine suspended solids in the wastewater to form flocs and settle, achieving preliminary flocculation, sedimentation, and decolorization treatment. The supernatant after solid-liquid separation and preliminary purification in the filter tank 10 is transported to the hydrolysis acidification tank 20 by the pump. Both the hydrolysis acidification tank 20 and the aerobic tank 30 are filled with multiple layers of biological packing material, providing a carrier for the attachment and growth of microorganisms and forming a stable biofilm system. In the hydrolysis acidification tank 20, anaerobic and facultative microorganisms break down the complex long-chain organic matter in the wastewater into short-chain small-molecule organic matter, and at the same time convert the difficult-to-biodegrade substances into easily biodegradable substances, significantly improving the biodegradability of the wastewater and creating favorable conditions for subsequent aerobic treatment. After hydrolysis and acidification treatment, the wastewater continues to enter the aerobic tank 30, where oxygen is continuously introduced into the water through the aeration device to provide sufficient dissolved oxygen for aerobic microorganisms. The aerobic microorganisms use the organic pollutants in the wastewater as a nutrient source for metabolism. Through adsorption, decomposition, and absorption, they degrade most of the remaining organic matter in the wastewater into carbon dioxide and water, achieving efficient removal of organic pollutants. Wastewater that has undergone biochemical treatment flows into decolorization tank 40, where a special deep decolorizing agent is added. Through chemical reaction, residual color substances and some recalcitrant pollutants in the wastewater are adsorbed and removed, further improving the quality of the effluent. The clean water obtained after the entire system treatment meets the standards and can be directly recycled. Please see Figure 2The filter tank 10 has an extended cavity 101 on one side of its upper end. This extended cavity 101 is used to collect and temporarily store large particulate impurities such as lint and fibers intercepted and separated by the filter screen 1, preventing impurities from accumulating in the tank and causing blockage. The top of the filter tank 10 has a water inlet pipe 102 that extends into the middle area of ​​the filter tank 10, allowing the wastewater to be treated to enter the tank evenly. The lower end of the filter tank 10 adopts a funnel-shaped structure design to facilitate the concentrated discharge of sediment. The lower end of the funnel is connected to a sewage discharge pipe 104 for periodic discharge. The filter tank 10 is equipped with a mounting plate 106 fixed in the middle, which divides the interior of the filter tank 10 into two functional areas: the space above the mounting plate 106 is a screening chamber for large particles of impurities; the space below the mounting plate 106 is a wastewater sedimentation chamber; a first dosing tank 105 is provided on one side of the filter tank 10, which is connected to the wastewater sedimentation chamber to add flocculants and decolorizing agents into the sedimentation chamber, so that the colloids and fine suspended solids in the wastewater form flocs and settle, and at the same time complete the preliminary decolorization treatment; Please see Figure 2 A first motor 2 is fixedly installed on the top surface of the filter tank 10. The first output shaft 21 of the first motor 2 extends downward into the filter tank 10 and is rotatably connected to the mounting plate 106, thereby achieving stable support and radial guidance for the first output shaft 21 during rotation. The filter screen 1 is connected to the first output shaft 21 through a first one-way bearing. The first one-way bearing is set to lock the transmission direction in the clockwise direction. When the first output shaft 21 rotates clockwise, it can directly drive the filter screen 1 to rotate synchronously through the first one-way bearing. The outer edge of the filter screen 1 fits against the inner wall of the filter tank 10, with a reasonable gap between them. The gap between the two parts creates a certain frictional resistance. When the first output shaft 21 rotates counterclockwise, the frictional resistance keeps the filter screen 1 stationary and prevents it from rotating with the shaft. The wastewater discharged from the inlet pipe 102 covers a portion of the filter screen 1, so the uncovered area is the cleaning area and the covered area is the filtration area. The filter tank 10 is also equipped with a transmission device 3, a limit group 4, a scraping group 5, and a dredging group 6. All the above components work together and work in conjunction to automatically complete the scraping and cleaning of impurities on the surface of the filter screen 1 and the dredging of the blocked parts of the filter screen 1, ensuring the continuous and stable operation of the filter screen 1. Please see Figure 3The transmission device 3 is located above the filter screen 1. The transmission device 3 mainly consists of a first belt 31, pulleys 32, and movable push plate assemblies 33. Pulleys 32 are respectively installed at both ends of the first belt 31. One end of the pulley 32 is connected to the first output shaft 21 through a second one-way bearing. The second one-way bearing is set to the counterclockwise direction as the transmission direction. That is, when the first output shaft 21 rotates counterclockwise, the first belt 31 can be driven to rotate synchronously through the second one-way bearing and the pulley 32. The other end of the first belt 31 extends into the extension cavity 101. Multiple movable push plate assemblies 33 are evenly installed at equal intervals along the outer wall of the first belt 31 and move synchronously with the belt. Please see Figure 4 The movable push plate assembly 33 specifically includes a sliding sleeve 331, a sliding plate 332, a push plate 333, and a slider 334; wherein the sliding sleeve 331 is fixedly connected to the first belt 31, the sliding plate 332 is connected to the sliding sleeve 331 by a sliding fit, and an elastic element is provided at the sliding fit part to realize the elastic return of the sliding plate 332; the push plate 333 is fixedly set at the lower end of the sliding plate 332 and extends vertically downward to drive the scraping assembly 5; the slider 334 is horizontally fixedly installed at the upper end of the sliding plate 332, and the free end of the slider 334 is provided with a mushroom head structure; Please see Figure 5 The limiting assembly 4 includes a limiting plate 41, a connecting rod 42, and a fixing rod 43. The limiting plate 41 is vertically arranged on one side of the transmission device 3 and is used to cooperate with the movable push plate assembly 33 to achieve motion guidance. The limiting plate 41 has an inclined slide groove 411 and a horizontal slide groove 412, which are connected end to end to form a continuous guide slide. Due to the opening of the slide grooves, the limiting plate 41 is divided into two block structures. To ensure the overall strength and structural stability, the block parts are assembled into one piece by the connecting rod 42, which also strengthens the limiting plate 41 as a whole. The fixing rod 43 is used to fix the limiting plate 41 inside the filter tank 10. The upper end of the fixing rod 43 is fixedly connected to the top surface of the filter tank 10, and the lower end is fixedly connected to the limiting plate 41, so that the limiting plate 41 remains in a fixed position during operation. When the first belt 31 rotates counterclockwise, the multiple movable push plate assemblies 33 rotate synchronously with the first belt 31. When the slider 334 in the movable push plate assembly 33 enters the inclined slide groove 411, the inclined slide groove 411 guides the slider 334, causing the slide plate 332 and the push plate 333 to move downward. When the slider 334 enters the horizontal slide groove 412, the horizontal slide groove 412 limits and constrains the slider 334, preventing the slide plate 332 from resetting upward under the action of the elastic element. During this process, the scraping assembly 5 is driven. Since the first belt 31 is a flexible structure, the mushroom head at the end of the slider 334 is always in contact with the wall of the limiting plate 41 during the movement, which can laterally limit the entire movable push plate assembly 33 and prevent shaking or deflection during the movement. The opening area at one end of the inclined slide 411 is larger than that of the rear channel. The purpose of this structure is that when the elastic element between the sliding sleeve 331 and the sliding plate 332 experiences elastic decay, causing the overall height of the slider 334 to drop, the larger opening can still smoothly accept the slider 334 into the inclined slide 411, thus avoiding the problem that the slider 334 cannot enter the inclined slide 411 normally due to the failure of the elastic element. Please see Figure 6 The scraping assembly 5 includes a second belt 51 and scrapers 52. The second belt 51 is positioned above the cleaning area of ​​the filter screen 1, and the other end of the second belt 51 extends into the extension cavity 101. Multiple scrapers 52 are fixedly installed on the second belt 51 at equal intervals. When the push plate 333 moves downward into position, it can directly push the scrapers 52 on the top surface of the second belt 51 to move synchronously, thereby driving the second belt 51 to rotate clockwise. At this time, the scrapers 52 on the bottom surface of the second belt 51 move accordingly, scraping away large particles of impurities accumulated above the cleaning area and continuously pushing the impurities into the extension cavity 101 for centralized collection. As the pusher plate 333 moves cyclically along the diameter of the filter screen 1 to clean the surface of the filter screen 1, the width of the pusher plate 333 is small due to its own structural limitations, and the cleaning area is limited in a single operation. If the width of the pusher plate 333 is simply increased, it will interfere with the surrounding structure and be obstructed during its movement with the first belt 31. To address this problem, this device adds a scraping group 5, which uses the scraper plate 52 and the second belt 51 to form a large-area cleaning structure, which can effectively clean large-particle impurities accumulated on the surface of the filter screen 1 and improve the overall cleaning effect. Please see Figure 7The unblocking assembly 6 is located at the lower end of the cleaning area of ​​the filter screen 1. The unblocking assembly 6 includes an assembly plate 61, a first nut 62, a third one-way bearing 63, unblocking columns 64, and a limiting column 65. The middle part of the assembly plate 61 is connected to the first nut 62 through the third one-way bearing 63. The lower end of the first output shaft 21 has a threaded section 22, and the first nut 62 meshes with the threaded section 22. A plurality of unblocking columns 64 are evenly arranged on the top surface of one end of the assembly plate 61, and the limiting column 65 is vertically fixed on the mounting plate 106. The other end of the assembly plate 61 is slidably engaged with the limiting post 65. A first spring is nested on the limiting post 65, and the lower end of the first spring abuts against the assembly plate 61, providing a downward restoring force for the assembly plate 61. When the threaded section 22 rotates counterclockwise with the first output shaft 21, the first nut 62 drives the assembly plate 61 to move upward through the third one-way bearing 63, so that the unblocking post 64 is inserted into the filter hole of the cleaning area from bottom to top, realizing the unblocking operation of the blocked hole. When the threaded section 22 rotates clockwise, the third one-way bearing 63 is in an idle state. In existing equipment, the filter screen 1 is usually cleaned from top to bottom using the unblocking column 64. However, dyeing wastewater contains flexible impurities such as thread ends and fibers. When these impurities adhere to the top surface of the filter screen 1, if they are directly pushed from top to bottom, one or both ends of the impurities may get stuck in the filter holes, while the middle part remains on the surface of the filter screen, making them unable to be effectively removed and causing continuous clogging of the filter screen. This structure, through the unblocking column 64 unblocking from bottom to top, can push the flexible impurities upwards to the surface of the filter screen as a whole, and together with the scraping assembly 5, achieves thorough cleaning, effectively solving the problem of incomplete cleaning of flexible impurities by traditional unblocking methods. Please see Figure 8 A third motor 401 is fixedly installed on the top surface of the decolorizing tank 40. The output shaft of the third motor 401 extends vertically downward into the interior of the decolorizing tank 40, and multiple stirring rods 402 are evenly installed on the output shaft. The decolorizing tank 40 is connected to a drainage pipe 403, and the bottom of the tank is connected to a second sewage pipe 404. The decolorizing tank 40 is also connected to a second dosing tank 405. During operation, an appropriate amount of special decolorizing agent is added into the decolorizing tank 40 by the second dosing tank 405. Then, the third motor 401 is started, and the multiple stirring rods 402 are driven to rotate at a uniform speed through the output shaft. The stirring action of the stirring rods 402 is used to fully mix and react with the wastewater in the tank. After the reaction is completed, the tank is allowed to settle. The clear water produced after sedimentation is discharged along the drainage pipe 403 and can be directly recycled. The impurities deposited at the bottom of the tank are periodically discharged through the second sewage pipe 404.

[0024] The working principle of this invention is as follows: First, wastewater is introduced into the filter tank 10 through the inlet pipe 102. The wastewater undergoes preliminary filtration through the filter screen 1, and then enters the wastewater sedimentation chamber at the lower end of the filter tank 10. The first dosing tank 105 adds flocculant and decolorizing agent into the sedimentation chamber, causing the colloids and fine suspended solids in the wastewater to form flocs and settle, thus completing the preliminary decolorization treatment. The wastewater is then treated sequentially through the hydrolysis acidification tank 20 and the aerobic tank 30 via the connecting pipe 50, and finally enters the decolorization tank 40. An appropriate amount of special decolorizing agent is added into the decolorizing tank 40 by the second dosing tank 405. Then, the third motor 401 is started, and multiple stirring rods 402 are driven to rotate at a constant speed through the output shaft. The stirring action of the stirring rods 402 is used to make the decolorizing agent and the wastewater in the tank fully mixed and reacted. After the reaction is completed, the tank is allowed to settle. The clear water produced after the sedimentation treatment is discharged through the drain pipe 403 and can be directly recycled. The impurities deposited at the bottom of the tank are periodically discharged through the second sewage pipe 404. When large particles of impurities are trapped and accumulated on the filter screen 1 and need to be cleaned, the first motor 2 is started first to rotate clockwise. The first motor 2 drives the filter screen 1 to rotate to a specified angle through the first output shaft 21, and adjusts the area to be cleaned to the cleaning station. Then the direction of the first motor 2 is switched to rotate counterclockwise. At this time, multiple moving push plate groups 33 operate synchronously with the first belt 31.

[0025] When the slider 334 on the movable push plate assembly 33 slides into the inclined slide groove 411, the inclined slide groove 411 provides directional guidance for the slider 334, thereby driving the slide plate 332 and the push plate 333 to move downwards along the slide sleeve 331 into place. As the push plate 333 moves downwards to the working position, it will directly abut against and push the scraper 52 on the top surface of the second belt 51 to move synchronously, thereby driving the second belt 51 to rotate clockwise. The scraper 52 on the bottom surface of the second belt 51 moves synchronously, thoroughly scraping away the large particles of impurities accumulated above the cleaning area of ​​the filter screen 1, and continuously pushing the impurities into the extension cavity 101 to complete the centralized collection and storage of impurities.

[0026] At the same time, the threaded section 22 at the lower end of the first output shaft 21 rotates counterclockwise synchronously with the shaft body. The first nut 62, through the transmission action of the third one-way bearing 63, drives the assembly plate 61 to move upward along the limit post 65 until the first nut 62 moves upward to separate from the threaded section 22 and is nested on the first output shaft 21. At this time, the unblocking post 64 on the assembly plate 61 is inserted into the filter hole of the cleaning area from bottom to top, pushing out the impurities blocked in the hole and completing the unblocking operation of the filter hole.

[0027] Second embodiment: Please refer to Figure 9Inside the wastewater sedimentation chamber at the lower end of the filter tank 10, a layered cover 7 and a guide group 9 are provided. A second motor 8 is fixedly installed on the bottom surface of the filter tank 10. The output end of the second motor 8 is connected to a second screw 81. The upper end of the second screw 81 is rotatably connected to the mounting plate 106 to achieve stable support and rotational guidance of the screw. A second nut 72 is fixedly provided at the axial center of the layered cover 7. The second nut 72 and the second screw 81 are nested and cooperate with each other. Multiple blades 73 are also evenly distributed on the layered cover 7. Please see Figure 9-10 The guide assembly 9 includes a mounting base 91, a rotating ring 92, a guide post 93, and a friction plate 94. The mounting base 91 is fixedly connected to the inner wall of the filter tank 10 to achieve fixed installation of the entire guide assembly. The rotating ring 92 is nested in the inner ring of the mounting base 91 and is rotatably connected to the mounting base 91, enabling circumferential rotation. The guide post 93 is vertically arranged and slidably connected to the rotating ring 92. The friction plate 94 is fixedly installed at the upper end of the guide post 93. A second spring is provided between the friction plate 94 and the rotating ring 92. A push ring 931 is also fixedly provided on the guide post 93, and the diameter of the push ring 931 is larger than the diameter of the guide post 93. The guide post 93 penetrates downward through the layered cover 7, and the push ring 931 is located above the layered cover 7. In the initial state, the friction plate 94 is tightly abutted against the top surface of the mounting base 91 by the elastic force of the second spring, and the friction between the two restricts the rotation of the mounting base 91, thereby achieving rotational limitation of the guide post 93.

[0028] Working principle: After the first dosing tank 105 adds flocculant and decolorizing agent to the wastewater sedimentation chamber, the second motor 8 starts, driving the second screw 81 to rotate counterclockwise. The second screw 81, through the cooperating second nut 72, drives the layered cover 7 to move upward. When the layered cover 7 moves upward and abuts against the push ring 931 on the guide column 93, it will simultaneously drive the guide column 93 to move upward, thereby separating the friction plate 94 from the top surface of the mounting base 91 and releasing the rotation limit. At this time, the layered cover 7 will rotate synchronously with the second screw 81, and its multiple blades 73 will rotate accordingly, fully mixing and stirring the flocculant, decolorizing agent and wastewater in the sedimentation chamber to ensure uniform reaction of the agents and wastewater.

[0029] After the mixing and stirring process continues for a set time, the second motor 8 stops running. Under the elastic force of the second spring, the friction plate 94 re-aggregates with the top surface of the mounting base 91, restoring the rotation limit. At the same time, the layered cover 7 falls back to its original position. Subsequently, the wastewater enters the settling stage. After the settling is completed, the second motor 8 starts again, driving the second screw 81 to rotate clockwise. The second nut 72 drives the layered cover 7 to move smoothly downward. The layered cover 7 covers the sludge and impurities deposited at the bottom of the settling chamber, preventing impurities from rising and affecting the quality of the effluent. Then, the supernatant that has undergone preliminary treatment in the filter tank 10 is pumped out through the pump on the connecting pipe 50 and transported to the hydrolysis acidification tank 20 for subsequent biochemical treatment. The concentrated impurities deposited at the bottom of the settling chamber are periodically discharged through the sewage pipe 104.

Claims

1. A wastewater recycling and regeneration treatment device for dyeing and printing wastewater, comprising: The filter tank (10), hydrolysis acidification tank (20), aerobic tank (30), and decolorization tank (40) are characterized in that: the filter tank (10), hydrolysis acidification tank (20), aerobic tank (30), and decolorization tank (40) are connected by a connecting pipe (50); a filter screen (1) is provided inside the filter tank (10), and the filter screen (1) is connected to the first output shaft (21) of the first motor (2); an extension cavity (101) is provided on one side of the upper end of the filter tank (10); a water inlet pipe (102) is provided at the top of the filter tank (10), and the water inlet pipe (102) corresponds to a part of the filter screen (1); the filter tank (10) is divided into two chambers along the middle, namely a large particle impurity screening chamber and a wastewater sedimentation chamber; a scraping group (5) is provided on the top surface of a part of the filter screen (1), and the scraping group (5) rotates to remove large particle impurities from the top surface of the filter screen (1).

2. The dyeing and printing wastewater recycling and regeneration treatment device according to claim 1, characterized in that: Both the hydrolysis acidification tank (20) and the aerobic tank (30) are filled with multiple layers of biological packing material.

3. The dyeing and printing wastewater recycling and regeneration treatment device according to claim 1, characterized in that: The filter tank (10) adopts a funnel-shaped structure at its lower end, and a sewage pipe (104) is connected to the lower end of the funnel. An installation plate (106) is fixedly provided in the middle of the filter tank (10). A first dosing box (105) is provided on one side of the filter tank (10), which is connected to the wastewater sedimentation chamber to add flocculant and decolorizing agent into the sedimentation chamber.

4. The dyeing and printing wastewater recycling and regeneration treatment device according to claim 1, characterized in that: The scraping assembly (5) includes a second belt (51) and scrapers (52); the second belt (51) is positioned above the filter screen (1), and the other end of the second belt (51) extends into the interior of the extension cavity (101), and a plurality of scrapers (52) are fixedly installed on the second belt (51) at equal intervals.

5. The dyeing and printing wastewater recycling and regeneration treatment device according to claim 1, characterized in that: The filter tank (10) is fixedly mounted with a first motor (2). The first output shaft (21) of the first motor (2) extends downward into the filter tank (10) and is rotatably connected to the mounting plate (106). The filter screen (1) is connected to the first output shaft (21) through a first one-way bearing. The first one-way bearing is set to lock the transmission direction in the clockwise direction. The outer edge of the filter screen (1) fits against the inner wall of the filter tank (10), and there is a reasonable fit gap between them to form a certain frictional resistance. The filter tank (10) is also equipped with a transmission device (3), a limit group (4), and a dredging group (6).

6. The dyeing and printing wastewater recycling and regeneration treatment device according to claim 5, characterized in that; The transmission device (3) is located above the filter screen (1). The transmission device (3) mainly consists of a first belt (31), pulleys (32) and a movable push plate assembly (33). The two ends of the first belt (31) are respectively equipped with pulleys (32). One end of the pulley (32) is connected to the first output shaft (21) through a second one-way bearing. The second one-way bearing is set to the counterclockwise direction as the transmission direction. The other end of the first belt (31) extends into the extension cavity (101). Multiple movable push plate assemblies (33) are evenly installed at equal intervals along the outer wall of the first belt (31).

7. The dyeing and printing wastewater recycling and regeneration treatment device according to claim 6, characterized in that: The movable push plate assembly (33) specifically includes a sliding sleeve (331), a sliding plate (332), a push plate (333), and a slider (334); wherein the sliding sleeve (331) is fixedly connected to the first belt (31), the sliding plate (332) is connected to the sliding sleeve (331) by a sliding fit, and an elastic element is provided at the sliding fit part of the two; the push plate (333) is fixedly set at the lower end of the sliding plate (332) and extends vertically downward.

8. The dyeing and printing wastewater recycling and regeneration treatment device according to claim 5, characterized in that: The limiting assembly (4) includes a limiting plate (41), a connecting rod (42), and a fixing rod (43); the limiting plate (41) is vertically arranged on one side of the transmission device (3); the limiting plate (41) has an inclined sliding groove (411) and a horizontal sliding groove (412) on its plate body, and the inclined sliding groove (411) and the horizontal sliding groove (412) are connected end to end; the connecting rod (42) reinforces the limiting plate (41) as a whole; the fixing rod (43) is used to fix the limiting plate (41) inside the filter tank (10).

9. The dyeing and printing wastewater recycling and regeneration treatment device according to claim 5, characterized in that: The unblocking assembly (6) is located at the lower end of the filter screen (1). The unblocking assembly (6) includes an assembly plate (61), a first nut (62), a third one-way bearing (63), an unblocking column (64), and a limiting column (65). The middle part of the assembly plate (61) is connected to the first nut (62) through the third one-way bearing (63). The lower end of the first output shaft (21) is provided with a threaded section (22), and the first nut (62) and the threaded section (22) mesh with each other. 61) Multiple unblocking columns (64) are evenly arranged on one end of the top surface. The limiting column (65) is vertically fixed on the mounting plate (106). The other end of the assembly plate (61) is slidably engaged with the limiting column (65). A first spring is nested on the limiting column (65). The lower end of the first spring abuts against the assembly plate (61). When the threaded section (22) rotates counterclockwise with the first output shaft (21), the first nut (62) drives the assembly plate (61) to move upward through the third one-way bearing (63).

10. The dyeing and printing wastewater recycling and regeneration treatment device according to claim 1, characterized in that: The filter tank (10) is provided with a layered cover (7) and a guide group (9) at its lower end. A second motor (8) is fixedly installed on the bottom surface of the filter tank (10). The output end of the second motor (8) is connected to a second screw (81). The upper end of the second screw (81) is rotatably connected to the mounting plate (106). A second nut (72) is fixedly provided at the axial position of the layered cover (7). The second nut (72) and the second screw (81) are nested together. Multiple blades (73) are also evenly distributed on the layered cover (7). The guide group (9) includes a mounting base (91), a rotating ring (92), a guide column (93), and a friction plate (94). The mounting base (91) is fixedly connected to the inner wall of the filter tank (10). The rotating ring (92) is nested in the inner ring of the mounting base (91) and is rotatably connected to the mounting base (91); the guide post (93) is arranged vertically and is slidably connected to the rotating ring (92); the friction plate (94) is fixedly installed on the upper end of the guide post (93), and a second spring is provided between the friction plate (94) and the rotating ring (92). A push ring (931) is also fixedly provided on the guide post (93), and the diameter of the push ring (931) is larger than the diameter of the guide post (93); the guide post (93) penetrates downward through the layered cover (7), and the push ring (931) is located above the layered cover (7); in the initial state, the friction plate (94) is tightly abutted against the top surface of the mounting base (91) by the elastic force of the second spring.

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