Textile printing and dyeing wastewater treatment device

Abstract

The invention discloses a textile printing and dyeing wastewater treatment device, and particularly relates to a flocculation treatment process technology of textile sewage, the textile printing and dyeing wastewater treatment device comprises a flocculation tank, a micro-sand polymerization tank and a clarification tank which are sequentially arranged along the flow direction of the sewage, and a baffle plate is arranged between the micro-sand polymerization tank and the clarification tank; a water outlet which is formed by the baffle plates and enters the clarification tank is infinitely close to the tank bottom of the clarification tank, and a sand blocking baffle module which is distributed above the water outlet is fixedly mounted in the clarification tank; the sand blocking baffle module is composed of a plurality of inclined plates distributed in a matrix mode, and first elastic shifting plates are arranged on the inclined plates at intervals. The movable frame horizontally moves back and forth in the sewage flowing direction. According to the device, light floc can be subjected to secondary trapping and sedimentation strengthening near the water outlet, the possibility that the floc is lost along with effluent is reduced on the premise that energy consumption and the dosage of chemicals are not remarkably increased, and the solid-liquid separation efficiency of textile wastewater is improved.

Description

Technical Field

[0001] This invention relates to a flocculation treatment process for textile wastewater, specifically a textile dyeing and printing wastewater treatment device. Background Technology

[0002] Flocculation treatment is a step in wastewater treatment. The specific process can be found in Chinese patent publication CN104591522A, published on 2015-05-06, which discloses a sludge flocculation and concentration treatment process. This process includes the following steps: forming micro-flocculations: adding a cationic flocculant to the sludge to be treated and stirring to neutralize the charge in the sludge, forming micro-flocculations; granulation and sedimentation: adding anionic flocculants to the sludge with formed micro-flocculations to cause the flocs to grow and form sediment. This treatment process is characterized by high efficiency, strong adaptability, and no secondary pollution or hazards. The steps involved in textile wastewater treatment are the same as in wastewater treatment, the difference being that textile wastewater contains more flocculated polymers. In this process, a micro-sand polymerization tank and a clarification tank are usually set up, and a sand-blocking baffle module is arranged near the outlet between the two to achieve preliminary separation of the flocs.

[0003] However, in actual treatment, due to the complex flow patterns and intense mixing of the media in the outlet area, while heavier flocs can settle to the bottom of the clarifier, a large number of lighter flocs tend to float to the surface with the water flow and are directly lost through the outlet, making them difficult to intercept effectively. The failure of these lighter flocs to settle in time not only reduces the efficiency of the flocculation reaction but also leads to a higher concentration of suspended solids in the effluent. Although this concentration is still within the maximum allowable range for suspended solids in the effluent, it still negatively impacts the overall treatment effect. Summary of the Invention

[0004] The purpose of this invention is to provide a textile dyeing and printing wastewater treatment device to solve the above-mentioned problems.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A textile dyeing wastewater treatment device includes a flocculation tank, a micro-sand aggregation tank, and a clarification tank arranged sequentially along the wastewater flow direction. A baffle plate is provided between the micro-sand aggregation tank and the clarification tank. The outlet formed by the baffle plate entering the clarification tank is infinitely close to the bottom of the clarification tank. Sand-blocking baffle modules are fixedly installed in the clarification tank and distributed above the outlet.

[0007] The sand-blocking baffle module is composed of multiple inclined plates arranged in a matrix, and the inclined plates are spaced apart by first elastic levers.

[0008] It also includes a movable frame that reciprocates horizontally along the direction of sewage flow, and a second elastic lever is fixedly installed on the movable frame in a blocking-and-removing engagement with the first elastic lever.

[0009] Preferably, the bottom of the clarification tank is divided into an inverted trapezoidal groove and a horizontal section symmetrically distributed about the center of the inverted trapezoidal groove.

[0010] It also includes a shaft that is driven to maintain circumferential rotation and a scraper plate that is fixedly installed at the end of the shaft and whose bottom surface is in contact with the inverted trapezoidal groove and the horizontal part.

[0011] Preferably, the scraper includes a lower cross scraper that fits the inverted trapezoidal groove and the horizontal part, a cross horizontal beam distributed parallel to the lower cross scraper, and an inclined plate disposed between the two.

[0012] Preferably, the sand-blocking baffle module includes mounting frames disposed on opposite sides of the crossbeam plate, and the shaft passes through the crossbeam plate.

[0013] The movable frame is slidably mounted on the bottom port section of the mounting frame;

[0014] A rectangular guide frame is fixedly installed between the two movable frames, while a deflecting guide wheel fixedly installed on the shaft moves within the rectangular guide frame and forms a sliding engagement with the long side of the rectangular guide frame.

[0015] Preferably, the second elastic lever plate is a U-shaped structure, while the cross-section of the first elastic lever plate is a V-shaped structure, and the two sides of the V-shaped structure are slidably connected to the inner wall of the U-shaped structure.

[0016] Preferably, the sand-blocking baffle module includes a slide rail frame, which is slidably connected to the mounting frame, and the sliding stroke of the slide rail frame is less than the sliding stroke of the moving frame.

[0017] Preferably, baffle boxes are welded between two adjacent inclined plates in a linearly equidistant manner, with the ports of the baffle boxes facing the bottom of the clarification tank.

[0018] Preferably, an overflow trough assembly is also included, which is disposed above the sand-blocking baffle module and at a predetermined depth below the horizontal plane of the clarifier.

[0019] The overflow water tank group includes a centrally distributed guide channel and overflow channels disposed on opposite sides of the guide channel and equidistantly distributed along the long side of the guide channel.

[0020] It also includes a water pump, which is used to extract liquid from the guide channel.

[0021] Preferably, one side of the overflow trough is provided with a horizontal water-contacting section and a flow-blocking plate fixedly connected to the horizontal water-contacting section and inclined toward the bottom of the overflow trough.

[0022] Preferably, the surface of the flow-reducing plate is provided with equally spaced flow-reducing grooves.

[0023] In the above technical solution, the textile dyeing wastewater treatment device provided by the present invention has the following beneficial effects: by driving the device to move back and forth along the wastewater treatment direction, the second elastic plate repeatedly touches the first elastic plate during the movement, forming a blocking-like action. After contact, the two generate high-frequency vibration, which in turn causes slight vibration of the surrounding water.

[0024] Because the sand-blocking baffle module is located adjacent to the outlet between the micro-sand aggregation tank and the clarification tank, the water flow in this area is complex and the media is violently mixed: the heavier flocs gradually settle to the bottom of the clarification tank, while the lighter flocs float upwards with the liquid. When these lighter flocs pass through the first and second elastic baffles with the water flow, the vibration generated by their contact causes continuous micro-vibration in the water, thus producing a significant retention effect on suspended particles in the liquid. In other words, the micro-vibration continuously disturbs the surrounding water flow, increasing the probability of collisions between lighter flocs and between flocs and the baffle surface, causing tiny particles to aggregate into larger, more easily settled flocs; on the other hand, the vibration disrupts the flow field conditions that allow the lighter flocs to float stably with the water flow, making it difficult for them to pass smoothly through the outlet, thus effectively intercepting and retaining them in this area, and eventually settling to the bottom of the clarification tank. In this way, through the periodic vibration of the elastic baffles, secondary capture and enhanced sedimentation of lighter flocs near the outlet are achieved, significantly reducing the possibility of flocs being lost with the effluent. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0026] Figure 1 This is a schematic diagram of the structure provided for an embodiment of the present invention;

[0027] Figure 2 This is a schematic diagram of the structure of the sand-blocking baffle module provided in an embodiment of the present invention;

[0028] Figure 3 A schematic diagram of the inclined plate, slide rail frame, and first elastic lever plate provided in an embodiment of the present invention;

[0029] Figure 4Provided for the embodiments of the present invention Figure 2 A schematic diagram of the structure of an explosion;

[0030] Figure 5 Provided for embodiments of the present invention Figure 4 Enlarged structural diagram at point A in the diagram;

[0031] Figure 6 A schematic diagram of the moving frame, deflection guide wheel, and rectangular guide frame provided in an embodiment of the present invention;

[0032] Figure 7 This is a schematic diagram of the overflow water tank assembly provided in an embodiment of the present invention;

[0033] Figure 8 This is a schematic diagram of the cross-sectional structure of the overflow channel provided in an embodiment of the present invention.

[0034] Explanation of reference numerals in the attached figures:

[0035] 1. Flocculation tank; 2. Micro-sand aggregation tank; 3. Clarification tank; 31. Inverted trapezoidal groove; 32. Horizontal section; 33. Shaft; 331. Deflecting guide wheel; 34. Sludge scraper; 341. Lower cross scraper; 342. Cross horizontal beam; 344. Inclined plate; 4. Baffle plate; 5. Sand-blocking baffle module; 51. Inclined plate; 52. First elastic lever plate; 53. Mounting frame; 54. Slide rail frame; 55. Baffle box; 6. Moving frame; 61. Second elastic lever plate; 63. Rectangular guide frame; 7. Overflow water trough assembly; 71. Guide channel; 72. Overflow channel; 73. Horizontal water wading section; 74. Flow-blocking plate; 75. Flow-reducing channel. Detailed Implementation

[0036] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0037] like Figure 1-8 As shown, a textile printing and dyeing wastewater treatment device includes a flocculation tank 1, a micro-sand aggregation tank 2 and a clarification tank 3 arranged sequentially along the wastewater flow direction. A baffle plate 4 is provided between the micro-sand aggregation tank 2 and the clarification tank 3. The outlet of the water entering the clarification tank 3 formed by the baffle plate 4 is infinitely close to the bottom of the clarification tank 3. The device is characterized in that a sand-blocking baffle module 5 is fixedly installed in the clarification tank 31 and distributed above the outlet.

[0038] The sand-blocking baffle module 5 is composed of multiple inclined plates 51 arranged in a matrix, and the inclined plates 51 are spaced apart by first elastic lever plates 52.

[0039] It also includes a movable frame 6 that reciprocates horizontally along the direction of sewage flow, and a second elastic lever 61 that is fixedly installed on the movable frame 6 in a blocking-and-removing engagement with the first elastic lever 52.

[0040] Specifically, flocculant is added to flocculation tank 1 and stirred to fully mix the flocculant with the liquid, forming flocs. Then, the mixture flows downwards along the baffle wall between flocculation tank 1 and micro-sand polymerization tank 2, entering micro-sand polymerization tank 2. In micro-sand polymerization tank 2, using existing stirring unit technology... Figure 1 The operation shown in the diagram causes the liquid at the bottom of the pool to rise and mix thoroughly with the released micro-sand, thereby increasing the weight of the flocs. The increased weight of the flocs enters the clarification pool 3 with the water flow. Most of the heavier flocs sink to the bottom of the pool due to their own weight; however, some lighter flocs (particles that are not fully combined with micro-sand or are not fully flocculated) float upward with the liquid and are blocked by the sand-blocking baffle module 5.

[0041] The driving device drives the mobile frame 6 to move back and forth repeatedly along the sewage treatment direction. During the movement, the second elastic deflector 61 repeatedly touches the first elastic deflector 52, forming a "blocking" action. After the two come into contact, they generate high-frequency vibrations, which in turn cause slight vibrations in the surrounding water.

[0042] Because the sand-blocking baffle module 5 is located close to the outlet between the micro-sand aggregation tank 2 and the clarifier tank 3, the water flow in this area is complex and the media mixing is intense. Heavier flocs gradually settle to the bottom of the clarifier tank 3, while lighter flocs float upwards with the liquid. When these lighter flocs pass through the first elastic baffle 52 and the second elastic baffle 61 with the water flow, the vibration generated by their contact causes continuous micro-vibration in the water, thereby producing a significant retention effect on suspended particulate matter in the liquid.

[0043] The micro-vibrations continuously disturb the surrounding water flow, increasing the probability of collisions between lightweight flocs and between flocs and the surface of the deflector plate. This causes the tiny particles to aggregate into larger, more easily settling flocs. Furthermore, the vibrations disrupt the flow field conditions that allow the lightweight flocs to float stably with the water flow, making it difficult for them to pass smoothly through the outlet. Consequently, they are effectively intercepted and retained in this area, eventually settling to the bottom of the clarifier. Thus, the periodic vibrations of the elastic deflector plate achieve secondary capture and enhanced settling of lightweight flocs near the outlet, significantly reducing the possibility of flocs being lost with the effluent.

[0044] As a further embodiment of the present invention, the bottom of the clarification tank 3 is divided into an inverted trapezoidal groove 31 and a horizontal portion 32 symmetrically distributed about the center of the inverted trapezoidal groove 31 according to its structure;

[0045] It also includes a shaft 33 that is driven to maintain circumferential rotation and a scraper 34 that is fixedly installed at the end of the shaft 33 and whose bottom surface is in contact with the inverted trapezoidal groove 31 and the horizontal part 32.

[0046] Specifically, the shaft 33 is fixedly connected to the output shaft of a three-phase asynchronous motor mounted on the top of the clarifier 3 via a crossbeam, and its rotation speed is relatively slow. The scraper 34 includes a lower cross scraper 341 that fits into the inverted trapezoidal groove 31 and the horizontal part 32, a cross horizontal beam 342 distributed parallel to the lower cross scraper 341, and an inclined plate 343 disposed between the two. The low rotation speed allows the scraper 34 to slowly scrape the flocs that have settled to the bottom of the tank to the bottom of the inverted trapezoidal groove 31 for discharge when it rotates, and to form a suitable vortex near the outlet, which helps the heavier flocs to further aggregate and settle.

[0047] Combination Figure 1 As shown, a guide pipe is installed between the micro-sand polymerization tank 2 and the clarifier tank 3. Its inlet is located between the outlet and the cross-shaped horizontal beam 342, while its outlet is located at the connection point between the flocculation tank 1 and the micro-sand polymerization tank 2. This guide pipe is equipped with a water pump, which diverts a portion of the liquid in the clarifier tank 3 back to the micro-sand polymerization tank 2 for secondary processing at a low suction rate. This allows for the re-mixing and polymerization of the light flocs that have not yet fully gained weight, improving overall treatment efficiency.

[0048] As another embodiment of the present invention, the sand-blocking baffle module 5 includes mounting frames 53 disposed on opposite sides of the crossbeam plate, and the shaft 33 passes through the crossbeam plate.

[0049] The movable frame 6 is slidably mounted on the bottom port section of the mounting frame 53;

[0050] A rectangular guide frame 63 is fixedly installed between the two movable frames 6, while the deflecting guide wheel 331 fixedly installed on the shaft 33 moves within the rectangular guide frame 63 and forms a sliding fit with the long side of the rectangular guide frame 63.

[0051] Specifically, the shaft 33 rotates slowly under the drive of the motor, causing the deflecting guide wheel 331 on it to move synchronously. The deflecting guide wheel 331 alternately contacts the two long sides of the rectangular guide frame 63, thereby periodically pushing the moving frame 6, causing it to reciprocate along the rectangular guide frame 63, achieving a back-and-forth swaying motion at a certain frequency. This swaying motion causes the moving frame 6 and the second elastic deflector 61 connected to it to continuously disturb the surrounding water, forming a low-frequency mechanical vibration effect.

[0052] The back-and-forth swaying of the moving frame 6 generates periodic flow disturbances within the liquid, creating local velocity gradients and micro-vortices. This disturbance alters the aggregation state and concentration distribution of the lightweight flocs, increasing the density and decreasing the spacing of floc nuclei in localized areas. This promotes the adsorption, cross-linking, and aggregation of more floc nuclei, forming larger, more massive flocs that subsequently settle, reducing suspended solids in the water. Studies have shown that sinusoidal oscillatory linear mixing can effectively enhance the aggregation of colloidal particles in water; the introduction of low-frequency mechanical vibration can reduce particle size and increase inter-floc porosity, thereby promoting liquid-solid mass transfer efficiency.

[0053] Lightweight flocs typically float with the water flow and are difficult to settle naturally. The reciprocating swaying of the moving frame 6 creates alternating flow velocities and directions in the water, disrupting the laminar flow environment required for the stable floating of lightweight flocs. This continuously disturbs their floating path, making it difficult for them to escape smoothly through the outlet, thus effectively trapping them in this area. As the trapped lightweight flocs gradually increase in number and combine with each other, their volume and weight increase, and eventually, due to their own weight, they detach from this area and fall into the collection range of the scraper 34 for discharge.

[0054] Periodic shaking also increases the collision frequency between lightweight flocs, causing smaller lightweight particles to adsorb each other and form larger, heavier flocs, thereby increasing their settling velocity. Under optimal conditions, the oscillation system can produce the theoretically predicted "crescent-shaped" settling pattern, with a turbidity removal rate higher than that of traditional coagulation methods. At the same time, the micro-vibrations caused by shaking accelerate the settling rate of the aggregated flocs, allowing them to detach from the aqueous phase and sink to the bottom of the clarifier tank 3 more quickly, thus achieving efficient removal of lightweight particulate matter.

[0055] As a further embodiment of the present invention, the second elastic lever 61 is specifically a U-shaped structure, while the cross-section of the first elastic lever 52 is a V-shaped structure, and the two sides of the V-shaped structure are slidably connected to the inner wall of the U-shaped structure.

[0056] Specifically, the V-shaped structure passes through the U-shaped structure. The ends of the V-shaped structure contract due to the obstruction of the U-shaped structure, causing them to detach and vibrate against each other. This vibration, generated when the lighter flocs pass the first elastic deflector 52 and the second elastic deflector 61 with the water flow, causes continuous micro-vibrations in the water, resulting in a significant retention effect on suspended particles in the liquid. In other words, the micro-vibrations continuously disturb the surrounding water flow, increasing the probability of collisions between lighter flocs and between flocs and the deflector surfaces, causing tiny particles to aggregate into larger, more easily settling flocs. Furthermore, the vibrations disrupt the flow field conditions that allow the lighter flocs to float stably with the water flow, making it difficult for them to pass smoothly through the outlet. They are effectively intercepted and retained in this area, eventually settling to the bottom of the clarifier. Thus, through the periodic vibrations of the elastic deflectors, secondary capture and enhanced sedimentation of the lighter flocs near the outlet are achieved, significantly reducing the possibility of flocs being lost with the effluent.

[0057] As a further embodiment of the present invention, the sand-blocking baffle module 5 includes a slide rail frame 54, which is slidably connected to the mounting frame 53, and the sliding stroke of the slide rail frame 54 is less than the sliding stroke of the moving frame 6.

[0058] Specifically, when the moving frame 6 moves the second elastic lever 61, it first pushes the slide rail frame 54 to move a short distance. After the slide rail frame 54 (with multiple inclined plates 51 welded inside) reaches its end position, the second elastic lever 61 continues to move. At this point, the two ends of the V-shaped structure contract due to the obstruction of the U-shaped structure, and after separation, the two vibrate at high frequency. This two-stage stroke design ensures reliable contact and vibration between the levers while avoiding excessive deformation or jamming caused by excessive stroke.

[0059] As a further embodiment of the present invention, baffle boxes 55 are welded between two adjacent inclined plates 51 in a linearly equidistant distribution, with the ports of the baffle boxes 55 facing the bottom of the clarification tank 3.

[0060] Specifically, as the upward-floating lightweight flocs pass through the area of ​​the inclined plate 51, some of them will enter the port of the baffle box 55 and accumulate there. As the accumulation increases, the weight of the flocs increases, and eventually they will fall out of the baffle box 55 and sink, further enhancing the interception and settling effect of the lightweight flocs.

[0061] As a further embodiment of the present invention, this embodiment also includes an overflow water trough group 7 disposed above the sand-blocking baffle module 5 and at a predetermined depth below the horizontal plane of the clarifier 3;

[0062] The overflow water tank group 7 includes a centrally distributed guide channel 71 and overflow channels 72 disposed on opposite sides of the guide channel 71 and equidistantly distributed along the long side of the guide channel 71.

[0063] It also includes a water pump, which is used to extract liquid from the guide channel 71.

[0064] Specifically, a horizontal wading section 73 and a flow-blocking plate 74 fixedly connected to the horizontal wading section 73 and inclined towards the bottom of the overflow trough 72 are provided on one side of the overflow trough 72. The horizontal wading section 73 is slightly lower than the horizontal plane of the clarifier 3, while the port of the overflow trough 72 is higher than the horizontal plane of the clarifier 3. During operation, the clear liquid in the upper part of the clarifier 3 first overflows the horizontal wading section 73, flows down along the flow-blocking plate 74, and then enters the overflow trough 72. The liquid level in the overflow trough 72 is lower than the lower part of the flow-blocking plate 74, thereby forming a thin water film on the surface of the flow-blocking plate 74. The surface of the flow-blocking plate 74 is provided with equidistantly distributed flow-reducing grooves 75. When the liquid flows through the flow-reducing grooves 75, the residual fine particles are further intercepted due to inertial collision or interception, forming a three-stage interception (the first two stages are the obstruction by the inclined plate 51 and the retention by the vibration of the elastic baffle). Finally, the fully clarified liquid is pumped out of the guide channel 71 by a water pump and enters subsequent treatment processes (e.g., further purification to reuse standards). The treatment process provided in this application enables the effluent quality to meet secondary industrial application standards.

[0065] Working principle:

[0066] Textile wastewater first enters flocculation tank 1. Flocculant is added to flocculation tank 1 and stirred to ensure thorough mixing with the wastewater, forming flocs. The mixture then flows downwards along the retaining wall between flocculation tank 1 and micro-sand polymerization tank 2, entering micro-sand polymerization tank 2.

[0067] In the micro-sand aggregation tank 2, the stirring unit (existing technology) operates, causing the liquid at the bottom of the tank to surge upwards, while simultaneously releasing micro-sand into the water. The surging water flow carries the flocs and micro-sand to mix violently, and the micro-sand adheres to the surface of the flocs, increasing their density and weight. The increased-weight flocs continue to move forward with the water flow, guided by the baffle plate 4, and enter the clarifier tank 3 from the outlet near the bottom of the clarifier tank 3.

[0068] Upon entering the clarification tank 3, most of the heavier flocs quickly settle to the bottom due to their own weight; while some of the lighter flocs (particles with insufficient sand binding or incomplete flocculation) float upward with the water flow. These lighter flocs first encounter the inclined plate 51 in the sand-blocking baffle module 5, where they are initially blocked and partially intercepted.

[0069] To further capture lightweight flocs, the device incorporates an elastic deflector vibration system. The drive unit moves the movable frame 6 repeatedly along the wastewater treatment direction. During this movement, the second elastic deflector 61 on the movable frame 6 repeatedly contacts the first elastic deflector 52 fixed between the inclined plates 51, creating a "blocking" action. This contact generates high-frequency vibrations, causing slight vibrations in the surrounding water. This vibration increases the probability of collisions between lightweight flocs and between the flocs and the deflector surface, causing tiny particles to aggregate into larger, more easily settling flocs. Furthermore, the vibration disrupts the flow field conditions required for the stable upward movement of the lightweight flocs, making it difficult for them to pass smoothly through the outlet, thus effectively retaining them in this area and ultimately causing them to settle to the bottom of the clarifier 3.

[0070] Meanwhile, the reciprocating motion of the moving frame 6 also enhances the effect on the lightweight flocs in another way. Driven by a slow-speed motor, the shaft 33 rotates, and its deflecting guide wheel 331 alternately contacts the two long sides of the rectangular guide frame 63, periodically pushing the moving frame 6, causing it to sway back and forth along the rectangular guide frame 63 at a certain frequency. This swaying motion generates low-frequency mechanical vibrations in the water, forming local velocity gradients and micro-vortices, further promoting the collision, aggregation, and sedimentation of the lightweight flocs. Specifically, the swaying increases the density of floc nuclei and decreases the spacing in local areas, prompting more floc nuclei to adsorb each other and form larger flocs; simultaneously, the alternating flow velocity and direction disrupt the laminar flow environment that allows the lightweight flocs to float stably, continuously disturbing their upward path and making it difficult for them to escape from the outlet. As the number of retained lightweight flocs increases and they combine, their weight increases, eventually causing them to detach from the water and sink to the bottom of the pool.

[0071] To improve interception efficiency, a baffle box 55 is also provided between adjacent inclined plates 51, with its port facing the bottom of the pool. The upward-floating lightweight flocs enter the port of the baffle box 55 and accumulate. After accumulating to a certain weight, they automatically fall off and sink, thus achieving assisted settling.

[0072] The flocculated material settling to the bottom of the clarifier 3 falls onto the bottom structure of the tank, which consists of an inverted trapezoidal groove 31 and a horizontal section 32. The shaft 33 drives the scraper 34 to rotate slowly, and the lower cross scraper 341 adheres to the bottom surface of the tank, scraping the deposited sludge to the lowest point of the inverted trapezoidal groove 31 for periodic discharge. Simultaneously, the slow rotation of the scraper 34 creates appropriate vortices near the outlet, which helps to further aggregate and settle the heavier flocculated material.

[0073] To further treat the light flocs that have not yet fully gained weight, the device also includes a reflux system. The inlet of the guide pipe is located between the outlet and the cross-shaped horizontal beam 342, and the outlet is located at the connection between the flocculation tank 1 and the micro-sand polymerization tank 2. A water pump returns a portion of the liquid containing a small amount of light flocs from the clarifier 3 to the micro-sand polymerization tank 2 at a low suction rate, allowing it to undergo the micro-sand mixing and weight gain process again, thereby improving the overall flocculation efficiency.

[0074] After the aforementioned multi-stage interception and sedimentation, the clarified liquid in the upper part of the clarifier 3 enters the overflow trough group 7. Since the horizontal wading section 73 is slightly lower than the water surface of the clarifier 3, while the port of the overflow trough 72 is higher than the water surface, the clarified liquid first overflows the horizontal wading section 73, flows down along the inclined baffle plate 74, and then enters the overflow trough 72. The surface of the baffle plate 74 is provided with equidistantly distributed flow-reducing grooves 75. When the liquid flows through the flow-reducing grooves 75, the residual extremely fine particles are intercepted again due to inertial collision or interception, achieving three-stage interception. Finally, the fully clarified liquid collects in the guide trough 71, is pumped out by a water pump, and enters the subsequent treatment process (which can be further purified to secondary industrial application standards).

[0075] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A textile dyeing wastewater treatment device, comprising a flocculation tank (1), a micro-sand aggregation tank (2), and a clarification tank (3) arranged sequentially along the wastewater flow direction, wherein a baffle plate (4) is provided between the micro-sand aggregation tank (2) and the clarification tank (3), and the outlet of the baffle plate (4) into the clarification tank (3) is infinitely close to the bottom of the clarification tank (3), characterized in that, The clarifier (31) is fixedly installed with sand-blocking baffle modules (5) distributed above the outlet. The sand-blocking baffle module (5) is composed of multiple inclined plates (51) arranged in a matrix, and the inclined plates (51) are spaced apart by first elastic levers (52). It also includes a movable frame (6) that reciprocates horizontally along the direction of sewage flow, and a second elastic plate (61) is fixedly installed on the movable frame (6) in a blocking-and-removing cooperation with the first elastic plate (52).

2. The textile dyeing and printing wastewater treatment device according to claim 1, characterized in that, The bottom of the clarification tank (3) is divided into an inverted trapezoidal groove (31) and a horizontal part (32) symmetrically distributed about the center of the inverted trapezoidal groove (31). It also includes a shaft (33) that is driven to maintain circumferential rotation and a scraper (34) that is fixedly installed at the end of the shaft (33) and whose bottom surface is in contact with the inverted trapezoidal groove (31) and the horizontal part (32).

3. The textile dyeing and printing wastewater treatment device according to claim 2, characterized in that, The scraper (34) includes a lower cross scraper (341) that fits into the inverted trapezoidal groove (31) and the horizontal part (32), a cross horizontal beam (342) that is parallel to the lower cross scraper (341), and an inclined plate (343) disposed between the two.

4. The textile dyeing and printing wastewater treatment device according to claim 2, characterized in that, The sand-blocking baffle module (5) includes mounting frames (53) disposed on opposite sides of the crossbeam plate, and the shaft (33) passes through the crossbeam plate. The movable frame (6) is slidably mounted on the bottom port section of the mounting frame (53); A rectangular guide frame (63) is fixedly installed between the two movable frames (6), and a deflecting guide wheel (331) fixedly installed on the shaft (33) moves within the rectangular guide frame (63) and forms a sliding fit with the long side of the rectangular guide frame (63).

5. The textile dyeing and printing wastewater treatment device according to claim 1, characterized in that, The second elastic lever (61) is specifically a U-shaped structure, while the first elastic lever (52) has a V-shaped cross-section, and the two sides of the V-shaped structure are slidably connected to the inner wall of the U-shaped structure.

6. The textile dyeing and printing wastewater treatment device according to claim 5, characterized in that, The sand-blocking baffle module (5) includes a slide rail frame (54), which is slidably connected to the mounting frame (53), and the sliding stroke of the slide rail frame (54) is less than the sliding stroke of the moving frame (6).

7. The textile dyeing and printing wastewater treatment device according to claim 1, characterized in that, A baffle box (55) is welded between two adjacent inclined plates (51) in a linearly equidistant distribution, with the port of the baffle box (55) facing the bottom of the clarification tank (3).

8. The textile dyeing and printing wastewater treatment device according to claim 1, characterized in that, It also includes an overflow trough group (7) that is set above the sand-blocking baffle module (5) and at a predetermined depth below the horizontal plane of the clarifier (3). The overflow water tank group (7) includes a centrally distributed guide channel (71) and overflow channels (72) disposed on opposite sides of the guide channel (71) and equidistantly distributed along the long side of the guide channel (71). It also includes a water pump for drawing liquid from the guide channel (71).

9. A textile dyeing and printing wastewater treatment device according to claim 8, characterized in that, A horizontal water-contacting part (73) and a flow-blocking plate (74) fixedly connected to the horizontal water-contacting part (73) and inclined toward the bottom of the overflow trough (72) are provided on one side of the overflow trough (72).

10. A textile dyeing and printing wastewater treatment device according to claim 9, characterized in that, The surface of the flow-reducing plate (74) is provided with equally spaced flow-reducing grooves (75).

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