A fabric environmentally friendly printing and dyeing wastewater treatment system and method

Abstract

The present invention provides a fabric environmentally friendly printing and dyeing wastewater treatment system and method, belonging to the field of wastewater treatment technology. A fabric environmentally friendly printing and dyeing wastewater treatment system includes at least a water storage tank, two flocculation tanks, two sedimentation tanks, a transition tank, an oxidation tank, a secondary sedimentation tank, a BAF tank, a disinfection tank, and a discharge trough, which are connected in sequence. The two flocculation tanks are simultaneously connected to the water storage tank, the two sedimentation tanks are connected to the two flocculation tanks in a one-to-one correspondence, and the two sedimentation tanks are simultaneously connected to the transition tank; flocculants and magnetic powder are simultaneously added to the flocculation tanks; each sedimentation tank is provided with a treatment mechanism for accelerating the sedimentation of magnetic flocs and quickly removing suspended matter; the sedimentation tank is provided with a water outlet assembly that can be adjusted in height, and the water storage area of the transition tank is lower than the water outlet assembly. The present invention has the advantage of improving sewage treatment efficiency.

Description

Technical Field

[0001] The present invention belongs to the technical field of wastewater treatment, and in particular to a system and method for treating fabric environmentally friendly printing and dyeing wastewater. Background Art

[0002] The present invention relates to a textile printing and dyeing wastewater treatment process. The existing process adopts a treatment process of mechanical screen → regulating tank → coagulation reaction → primary sedimentation tank → hydrolysis acidification tank → contact oxidation tank → secondary sedimentation tank → BAF tank → disinfection tank → discharge tank. This process exposes significant contradictions in actual operation.

[0003] In order to ensure that fiber debris, loose flocs and other difficult-to-sediment materials are fully settled, the retention time in the primary sedimentation tank needs to be extended to 4-6 hours. The conventional design value is 2-4 hours. However, the extended retention time causes the flocs to stay in the tank for a long time and break up, and the suspended matter concentration increases. The formed flocs are suspended in the water due to the density difference. When the unsettled suspended matter enters the biochemical system, the sludge load in the secondary sedimentation tank increases.

[0004] After adding magnetic powder, the sedimentation efficiency is significantly improved. However, the existing magnetic powder dosing system has the problem of uneven mixing. There are differences in the magnetic concentration in different areas of the pool. The flocs and magnetic powder are not completely mixed, and there are also suspended bodies of unmixed magnetic powder. The sedimentation rate of the formed magnetic floc complex does not reach the ideal value. Summary of the Invention

[0005] The purpose of the present invention is to address the above-mentioned problems in the existing technology and propose an environmentally friendly fabric printing and dyeing wastewater treatment system with the characteristics of improving sewage treatment efficiency.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] A fabric environmentally friendly printing and dyeing wastewater treatment system comprises at least a water storage tank, two flocculation tanks, two sedimentation tanks, a transition tank, an oxidation tank, a secondary sedimentation tank, a BAF tank, a disinfection tank, and a discharge chute connected in sequence, wherein the two flocculation tanks are simultaneously connected to the water storage tank, the two sedimentation tanks are connected to the two flocculation tanks one by one, and the two sedimentation tanks are simultaneously connected to the transition tank; flocculants and magnetic powder are simultaneously added to the flocculation tanks; each of the sedimentation tanks is provided with a treatment mechanism for accelerating the sedimentation of magnetic flocs and quickly removing suspended matter, the sedimentation tank is provided with a water outlet assembly that can be adjusted in height, and the water storage area of the transition tank is lower than the water outlet assembly, the bottom of the sedimentation tank is provided with a mud outlet and a mud scraping mechanism for scraping the bottom sludge into the mud outlet, and the top of the sedimentation tank is provided with a removal mechanism for removing the suspended matter from the treatment mechanism and returning it to the bottom of the sedimentation tank.

[0008] The turret is connected to the lift frame and is used to move the lift frame upwards and downwards, and the lift frame is provided with a plurality of symmetrically arranged conduits, the conduits comprising a horizontal pipe portion and a vertical pipe portion, the horizontal pipe portion and the vertical pipe portion being connected by a bend pipe portion, a magnetic block chain body being provided in the conduit, and a plunger body being connected to the end of the magnetic block chain body, the plunger body being provided in the vertical pipe portion, and the plunger body being sealed to the inner wall of the vertical pipe portion, when accelerating the sedimentation of the magnetic flocs, the magnetic block chain body is at least partially located in the horizontal pipe portion for adsorbing the magnetic flocs, and when the magnetic flocs are separated, the magnetic block chain body enters the vertical pipe portion to cause the magnetic flocs located outside the horizontal pipe portion to fall off; the upper end of the vertical pipe portion is used to connect an air source for evacuating or inflating the vertical pipe portion to control the height position of the plunger body,

[0009] In the above-mentioned fabric environmentally friendly printing and dyeing wastewater treatment system, the treatment mechanism also includes a number of filter components, which are rotatably arranged on a lifting frame, and the filter components are located above the horizontal pipe portion. Adjacent filter components can form a channel for the unadsorbed suspended matter to pass through, or all filter components are combined to form a horizontal filter baffle, and the filter component is coaxially connected to a driven gear, and a rack is slidably provided on the lifting frame and meshes with all driven gears. A tooth group is provided on the side of the rack away from the driven gear, and a first drive motor is also fixed on the lifting frame, and a driving gear is fixed on the output shaft of the first drive motor. The first drive motor meshes with the tooth group to drive the filter component to rotate.

[0010] In the above-mentioned environmentally friendly fabric printing and dyeing wastewater treatment system, the magnetic block chain includes a plurality of hinged frames connected to each other, and each hinge frame is equipped with a magnet.

[0011] In the above-mentioned fabric environmentally friendly printing and dyeing wastewater treatment system, the scraping mechanism includes two scraping assemblies symmetrically arranged at the bottom of the sedimentation tank, and the scraping assembly includes a second drive motor, a screw assembly and a scraper. The second drive motor is installed outside the sedimentation tank, and the screw assembly is installed at the bottom of the sedimentation tank and is connected to the second drive motor. The screw assembly is arranged along the bottom wall of the sedimentation tank, and the scraper is connected to the screw assembly. The second drive motor drives the screw assembly to rotate and drives the scraper to move along the bottom wall of the sedimentation tank. The scraper moves between the side wall of the sedimentation tank and the mud outlet.

[0012] In the above-mentioned fabric environmentally friendly printing and dyeing wastewater treatment system, a baffle is installed between the horizontal pipe part and the curved pipe part, and the baffle is used to prevent the magnetic flocs from entering the vertical pipe part.

[0013] In the above-mentioned environmentally friendly fabric printing and dyeing wastewater treatment system, the conduit is made of non-magnetic material.

[0014] In the above-mentioned fabric environmentally friendly printing and dyeing wastewater treatment system, the driving assembly includes multiple servo motors and screw assemblies, the screw assembly includes a screw and a nut, the screw is rotatably arranged in the sedimentation tank, the nut is fixedly connected to the connecting frame, the connecting frame is connected to the lifting frame, and the servo motor is connected to the screw to drive the screw to rotate.

[0015] In the above-mentioned fabric environmentally friendly printing and dyeing wastewater treatment system, the filter assembly includes a frame and a filter screen, the filter screen is fixed on the frame, and the removal mechanism includes several air guns fixed on the top of the sedimentation tank, the air guns are aimed at the filter screen, the air guns are used to connect to the air source, and a solenoid valve is installed on the connecting pipe between the air gun and the air source.

[0016] In the above-mentioned fabric environmentally friendly printing and dyeing wastewater treatment system, the outlet assembly includes a lifting gate and a hydraulic cylinder. A lifting gate that can be raised and lowered is installed on the side wall of the sedimentation tank. A serrated plate is installed on the top of the lifting gate. The hydraulic cylinder is installed on the side wall of the sedimentation tank. The piston rod of the hydraulic cylinder is fixedly connected to the lifting gate for driving the lifting gate to rise and fall.

[0017] A method for treating environmentally friendly fabric printing and dyeing wastewater, comprising the following steps:

[0018] S1, the printing and dyeing wastewater is introduced into the water storage tank for water homogenization, and then the wastewater is distributed to two flocculation tanks through diversion to ensure alternating and continuous treatment in the two tanks;

[0019] S2. Add flocculant and magnetic powder simultaneously into the flocculation tank, stir to fully mix the flocculant and magnetic powder, and promote the formation of magnetic flocs from suspended solids and dye impurities in the wastewater; the magnetic powder accelerates the subsequent sedimentation process by increasing the density of the flocs, and some unfused magnetic powder forms a suspension;

[0020] S3. After flocculation, the wastewater enters the corresponding sedimentation tanks and the treatment mechanism is started:

[0021] S31. The magnetic chain in the conduit is located in the horizontal pipe section, which attracts the magnetic flocs through magnetic force. At the same time, the lifting frame drives the conduit and filter assembly downward, accelerating the flocs to settle to the bottom of the pool. At this time, the filter assembly rotates to a vertical position to form a channel, and the unabsorbed suspended matter floats up to the filter screen with the water flow;

[0022] S32, the plunger is sucked by the air source, so that the magnetic block chain enters the vertical pipe part, and the magnetic flocs are separated and settled to the bottom of the pool;

[0023] S33, the filter assembly rotates to a horizontal state and combines into a filter baffle; at the same time, the lifting frame drives the filter baffle to rise, salvaging the suspended matter until the filter baffle is separated from the supernatant;

[0024] S34. The height of the sedimentation tank outlet is adjusted by a hydraulic cylinder to lift the gate, allowing the supernatant to flow to the transition tank by gravity, avoiding disturbing the sludge at the bottom. The filter assembly is rotated 180 degrees and the suspended solids on the filter assembly are blown off by the removal mechanism. The sludge scraping mechanism scrapes the sludge at the bottom of the tank into the sludge discharge port for recovery.

[0025] S4, the supernatant is buffered in the transition tank and flows into the oxidation tank by gravity, and then enters the secondary sedimentation tank, BAF tank, disinfection tank in sequence, and finally enters the discharge tank for detection and discharge. Compared with the existing technology, this application has the following advantages:

[0026] This system significantly improves sedimentation efficiency and reduces settling time through the synergistic effect of magnetic powder and flocculants within the flocculation tank, along with the cooperation of the sedimentation tank's treatment mechanism and adjustable outlet assembly. This optimizes the overall printing and dyeing wastewater treatment process. Dual flocculation and sedimentation tanks operate alternately, achieving continuous treatment. Furthermore, cleaning of the flocculation and sedimentation tanks is more convenient, eliminating the need to shut down production and allowing for direct cleaning during alternating periods. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a layout diagram of the wastewater treatment system in this application;

[0028] Figure 2 It is a three-dimensional structural diagram of the sedimentation tank in this application;

[0029] Figure 3 It is a top view of the sedimentation tank in this application;

[0030] Figure 4 yes Figure 3 A cross-sectional structural diagram at the AA position;

[0031] Figure 5 yes Figure 3 A cross-sectional structural diagram of the middle BB position with the scraper mechanism removed;

[0032] Figure 6 This is a structural diagram of the present application in which the processing mechanism is lowered and the filter assembly is in a vertical state;

[0033] Figure 7 It is a schematic diagram of the structure of the sedimentation tank including the removal mechanism in this application;

[0034] In the figure,

[0035] 100. Gas source;

[0036] 2. Reservoir;

[0037] 3. Flocculation tank;

[0038] 4. Sedimentation tank;

[0039] 41. Processing mechanism; 411. Lifting frame; 4111. Conduit; 41111. Horizontal pipe; 41112. Vertical pipe; 41113. Bend pipe; 41114. Magnetic chain; 41115. Plunger; 41116. Baffle;

[0040] 412, filter assembly; 4121, frame; 4122, filter;

[0041] 413, drive assembly; 4131, servo motor; 4132, screw assembly;

[0042] 414, driven gear; 415, rack; 4151, gear set; 416, first drive motor; 417, driving gear;

[0043] 42. Water outlet assembly; 421. Lifting gate; 422. Hydraulic cylinder;

[0044] 43. Mud discharge port;

[0045] 44. Mud scraping mechanism; 441. Mud scraping assembly; 4411. Second drive motor; 4412. Lead screw assembly; 4413. Scraper;

[0046] 45. Removal mechanism; 451. Air gun; 452. Solenoid valve;

[0047] 5. Transition pool;

[0048] 6. Secondary sedimentation tank;

[0049] 7. BAF pool;

[0050] 8. Disinfection pool;

[0051] 9. Discharge chute;

[0052] 10. Oxidation pond; DETAILED DESCRIPTION

[0053] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0054] like Figures 1 to 7As shown, a fabric environmentally friendly printing and dyeing wastewater treatment system comprises at least a water storage tank 2, two flocculation tanks 3, two sedimentation tanks 4, a transition tank 5, an oxidation tank 10, a secondary sedimentation tank 6, a BAF tank 7, a disinfection tank 8, and a discharge trough 9 connected in sequence, wherein the two flocculation tanks 3 are simultaneously connected to the water storage tank 2, the two sedimentation tanks 4 are connected to the two flocculation tanks 3 one by one, and the two sedimentation tanks 4 are simultaneously connected to the transition tank 5; flocculants and magnetic powder are simultaneously added to the flocculation tanks 3; each sedimentation tank 4 is provided with a treatment mechanism 41 for accelerating the sedimentation of magnetic powder and quickly removing suspended matter, a water outlet assembly 42 which can be adjusted in height is provided in the sedimentation tank 4, and the water storage area of the transition tank 5 is lower than the water outlet assembly 42, a mud outlet 43 and a mud scraping mechanism 44 for scraping the bottom sludge into the mud outlet 43 are provided at the bottom of the sedimentation tank 4, and a removal mechanism 45 for removing the suspended matter from the treatment mechanism 41 and returning it to the bottom of the sedimentation tank 4 is provided at the top of the sedimentation tank 4.

[0055] The printing and dyeing wastewater treatment system of the present application innovatively sets two flocculation tanks 3 and two sedimentation tanks 4, which significantly improves the wastewater treatment efficiency.

[0056] The printing and dyeing wastewater first flows into the water storage tank 2, where it completes preliminary storage and water homogenization. Then, the wastewater enters two flocculation tanks 3 at the same time. In the flocculation tanks 3, flocculants and magnetic powders are added simultaneously. The flocculants cause the impurities in the wastewater to aggregate into flocs, while the magnetic powders increase the weight of the flocs and accelerate the sedimentation process.

[0057] The flocculated wastewater flows into the corresponding sedimentation tank 4 respectively. Different from the traditional horizontal, vertical and radial sedimentation tank 4, in this application, water pumps are separately provided between the two flocculation tanks 3 and the water storage tank 2, and between the two flocculation tanks 3 and the sedimentation tank 4. The water inlet and outlet of the sedimentation tank 4 of this system are independent of each other. After the wastewater of the flocculation tank 3 fills the sedimentation tank 4, the water pumps between the two are disconnected. When a flocculation tank reaches the preset liquid level, its corresponding water pump is turned off and the corresponding sedimentation tank treatment process is started. At the same time, the water inlet valve of the other flocculation tank is opened to achieve seamless connection. At this time, the sedimentation tank 4 only needs to focus on the precipitation of flocs and the removal of floating objects, avoiding water inlet disturbance and the treatment in the sedimentation tank 4. The mechanism 41 plays a key role. It can not only quickly transfer the flocculent precipitate containing magnetic powder to the bottom of the pool, but also directly salvage the suspended body suspended in the water, greatly compressing the sedimentation work that originally took several hours, and greatly improving the sedimentation efficiency. At the same time, the outlet assembly 42 in the sedimentation tank 4 is height-adjustable, and the supernatant can be quickly discharged into the transition tank 5, and then sent to the oxidation tank 10 through the transition tank 5, further improving the initial treatment efficiency. It is worth mentioning that thanks to the design of the transition tank 5 being lower than the outlet assembly 42, the wastewater can flow into the transition tank 5 by gravity, reducing the use of equipment such as lifting pumps, and the drainage process starts from the supernatant at the top and will not affect the sludge area at the bottom.

[0058] In oxidation pond 10, wastewater undergoes biochemical oxidation treatment to decompose organic pollutants. It then passes through secondary sedimentation tank 6 for sludge-water separation, BAF tank for deep purification, and disinfection tank 8 for sterilization, before finally being discharged into discharge trough 9 in compliance with standards. The specific methods for transferring wastewater between the various tanks in this application are based on existing technologies and will not be detailed here.

[0059] Two flocculation tanks 3 and two sedimentation tanks 4 are set up to achieve staggered operation. When one flocculation tank 3 is performing flocculation operation, the other can receive new sewage through the water storage tank 2; when one flocculation tank 3 completes flocculation and discharges into the sedimentation tank 4, the other sedimentation tank 4 is discharging the separated supernatant into the transition tank 5. This design effectively avoids the interference of water inflow into the traditional sedimentation tank 4 on the bottom sedimentation, greatly improving the operating efficiency and stability of the entire system.

[0060] Furthermore, the mud outlet 43 of the sedimentation tank 4 and the mud scraping mechanism 44 for scraping the bottom mud into the mud outlet 43 are prior arts and will not be described in detail here.

[0061] Moreover, the water storage tank 2, two flocculation tanks 3, oxidation tank 10, secondary sedimentation tank 6, BAF tank 7, disinfection tank 8, and discharge trough 9 in this application are existing technologies, and the transition tank 5 is only used to buffer the water before it enters the oxidation tank 10.

[0062] In summary, this system significantly improves the sedimentation efficiency, reduces the sedimentation time, and comprehensively optimizes the printing and dyeing wastewater treatment process through the synergistic effect of the magnetic powder and flocculant in the flocculation tank 3, as well as the cooperation of the treatment mechanism 41 and the adjustable water outlet assembly 42 in the sedimentation tank 4. The dual flocculation tanks 3 and the sedimentation tank 4 operate alternately to achieve continuous treatment. In addition, the cleaning of the flocculation tank 3 and the sedimentation tank 4 is also more convenient. There is no need to stop production for treatment, and they can be cleaned directly during the alternating use stage. In the present application scheme, a magnetic separator is also required to classify the magnetic powder for reuse, but this technical solution has been fully disclosed, and this application will not elaborate on it here.

[0063] Specifically, the processing mechanism 41 includes a lifting frame 411 and a driving assembly 413. The lifting frame 411 is arranged in the sedimentation tank 4 and can be lifted and lowered in the sedimentation tank 4. The driving assembly 413 is connected to the lifting frame 411 and is used to drive the lifting frame 411 to lift and lower. The lifting frame 411 is provided with a plurality of symmetrically arranged conduits 4111. The conduits 4111 have a horizontal pipe portion 41111 and a vertical pipe portion 41112. The horizontal pipe portion 41111 and the vertical pipe portion 41112 are connected by a bend portion 41113. There is a magnetic chain body 41114 and a plunger body 41115 connected to the end of the magnetic chain body 41114. The plunger body 41115 is arranged in the vertical tube part 41112, and the plunger body 41115 is sealed with the inner wall of the vertical tube. When accelerating the sedimentation of the magnetic flocs, the magnetic chain body 41114 is at least partially located in the horizontal tube part 41111 to absorb the magnetic flocs. When the magnetic flocs are separated, the magnetic chain body 41114 enters the vertical tube part 41112 to make the magnetic flocs located outside the horizontal tube part 41111 The upper end of the vertical pipe portion 41112 is used to connect the air source 100, which is used to evacuate or inflate the vertical pipe portion 41112 to control the height position of the plunger body 41115; the processing mechanism also includes a plurality of filter components 412, which are rotatably arranged on the lifting frame 411, and the filter components 412 are located above the horizontal pipe portion 41111, and adjacent filter components 412 can form a channel for the unadsorbed suspension to pass through, or all filter components 412 are combined to form a horizontal filter. Partition, the filter assembly 412 is coaxially connected to a driven gear 414, the lifting frame 411 is slidably provided with a rack 415, and is engaged with all the driven gears 414, and the rack 415 is provided with a tooth group 4151 on the side away from the driven gear 414, and the lifting frame 411 is also fixed with a first drive motor 416, and the output shaft of the first drive motor 416 is fixed with a driving gear 417, and the first drive motor 416 is engaged with the tooth group 4151, which is used to drive the filter assembly 412 to rotate.

[0064] In the present application, the printing and dyeing wastewater flows into the primary sedimentation tank 4 after being treated in the flocculation tank 3, and the driving component 413 is immediately started. At this time, the magnetic chain 41114 in the conduit 4111 is at least partially in the horizontal pipe part 41111. Since the magnetic chain 41114 is magnetic, it can quickly adsorb the flocs formed by flocculation and containing magnetic powder in the wastewater at a close distance. A large number of magnetic flocs gather on the outside of the horizontal pipe part 41111 or close to the horizontal pipe. As the adsorption amount increases, the driving component 413 drives the lifting frame 411 to descend synchronously, accelerating the magnetic flocs to settle to the bottom of the sedimentation tank 4. During the descent of the lifting frame 411, the filter component 412 rotates to a vertical state, and there is a channel between adjacent rotating components. Those flocs or floating objects that cannot be attracted by the magnetic chain 41114 can pass through the channel on the lifting frame 411 and move to the top of the installation frame until the horizontal pipe part 41111 is lowered to a position close to the bottom of the sedimentation tank 4, and the sedimentation effect is optimized.

[0065] When it is necessary to separate the adsorbed magnetic flocs from the magnetic chain body 41114, the vertical tube portion 41112 is evacuated by controlling the air source 100, the air pressure in the tube is reduced, and the plunger body 41115 moves upward under the action of the external air pressure, driving the magnetic chain body 41114 from the horizontal tube portion 41111 into the vertical tube portion 41112. As the position of the magnetic chain body 41114 changes, the magnetic flocs originally adsorbed on the outside of the horizontal tube portion 41111 fall off due to the loss of magnetic attraction, and settle to the bottom of the sedimentation tank 4, thereby realizing efficient separation of the magnetic flocs and the magnetic chain body 41114.

[0066] After the magnetic flocs are settled and separated, the driving component 413 controls the lifting frame 411 to rise. During the rising process, all the filter components 412 rotate to a horizontal state and combine into a filter partition, so that the filter components 412 enter the working state. The suspended matter in the wastewater passes through the filter components 412 under the drive of the water flow, and the suspended matter is intercepted by the filter components 412 to further purify the wastewater.

[0067] This treatment mechanism 41 exhibits numerous advantages during operation. Leveraging the magnetic chain 41114's adsorption properties on the magnetic flocs, the chain 41114 approaches the magnetic flocs, significantly accelerating the magnetic flocs' sedimentation rate and significantly shortening the sedimentation time. This effectively improves sedimentation efficiency, thereby comprehensively optimizing the operating efficiency of the entire wastewater treatment system. Furthermore, the air source 100 precisely controls the position of the plunger 41115, enabling the magnetic chain 41114 to be repositioned, allowing the magnetic flocs to easily detach from the chain 41114 and settle to the bottom of the tank. This not only facilitates the recycling of the magnetic flocs but also facilitates the cleaning and maintenance of the chain 41114, ensuring its continued stable operation. This also significantly improves the efficiency of water inflow and outflow to the sedimentation tank 4, thereby shortening the processing time of this step.

[0068] Specifically, the magnetic block chain 41114 includes a plurality of hinged frames connected to each other, and a magnet is installed on each hinged frame.

[0069] Since the magnetic block chain body 41114 is composed of independent hinged frames, if some magnets are damaged or their adsorption capacity is reduced, the corresponding hinged frames and magnets can be replaced or maintained separately, and it is also smoother and easier to transfer the magnetic block chain body 41114 from the horizontal tube part 41111 to the vertical tube part 41112.

[0070] Specifically, the scraping mechanism 44 includes two scraping assemblies 441 symmetrically arranged at the bottom of the sedimentation tank 4. The scraping assembly 441 includes a second drive motor 4411, a screw assembly 4412 and a scraper 4413. The second drive motor 4411 is installed outside the sedimentation tank 4, and the screw assembly 4412 is installed at the bottom of the sedimentation tank 4 and is connected to the second drive motor 4411. The screw assembly 4412 is arranged along the bottom wall of the sedimentation tank 4, and the scraper 4413 is connected to the screw assembly 4412. The second drive motor 4411 drives the screw assembly 4412 to rotate and drives the scraper 4413 to move along the bottom wall of the sedimentation tank 4. The scraper 4413 moves between the side wall of the sedimentation tank 4 and the mud outlet.

[0071] The sludge at the bottom of the sedimentation tank 4 can be sent to the mud outlet through the sludge scraping mechanism 44, so that the sludge settled in the sedimentation tank 4 can be recovered each time, thereby facilitating preparation for the next rapid injection of sewage.

[0072] Specifically, a baffle 41116 is installed between the horizontal tube portion 41111 and the curved tube portion 41113 , and the baffle 41116 is used to prevent the magnetic flocs from entering the vertical tube portion 41112 .

[0073] The baffle 41116 installed between the horizontal tube portion 41111 and the curved tube portion 41113 plays a key role in the entire magnetic floc processing process. When entering the magnetic floc separation link, it allows the magnetic flocs to fall off smoothly from the outside of the horizontal tube portion 41111, preventing the magnetic flocs from following the magnetic block chain 41114 to move to the outside of the vertical tube portion 41112, thereby greatly improving the magnetic floc recovery efficiency.

[0074] Specifically, the catheter 4111 is made of non-magnetic material.

[0075] The conduit 4111 made of non-magnetic material does not interfere with the magnetic field distribution of the magnetic chain 41114. This ensures that during the magnetic floc adsorption and sedimentation stage, the magnetic flocs are only attracted by the magnetic force of the magnetic chain 41114 and accurately gather on the outside of the horizontal tube 41111.

[0076] Non-magnetic materials include polypropylene (PP), austenitic stainless steel such as 304, 316L, alumina ceramics and other materials.

[0077] Specifically, the driving assembly 413 includes multiple servo motors 4131 and a screw assembly 4132. The screw assembly 4132 includes a screw and a nut. The screw is rotatably arranged in the sedimentation tank 4. The nut is fixedly connected to the connecting frame. The connecting frame is connected to the lifting frame 411. The servo motor 4131 is connected to the screw to drive the screw to rotate.

[0078] The servo motor 4131 outputs precise rotational power, driving the screw connected to it to rotate in the sedimentation tank 4. Since the nut is fixedly connected to the connecting frame, and the connecting frame is connected to the lifting frame 411, the rotation of the screw drives the nut to move downward along the axis of the screw. In this process, the nut drives the connecting frame and the lifting frame 411 connected to it to descend synchronously, so that the magnetic block chain 41114 in the conduit 4111 gradually penetrates into the appropriate position in the wastewater, creating conditions for the adsorption of magnetic flocs.

[0079] After completing a series of treatments such as magnetic floc adsorption and sedimentation and suspended solid filtration, the lifting frame 411 needs to be lifted. At this time, the control system reversely drives the servo motor 4131 to drive the screw rod to rotate in the opposite direction. Under the action of the reverse rotation of the screw rod, the nut moves upward along the axial direction of the screw rod, thereby driving the connecting frame and the lifting frame 411 to rise synchronously.

[0080] In the above-mentioned fabric environmentally friendly printing and dyeing wastewater treatment system, the filter component 412 includes a frame 4121 and a filter screen 4122, the filter screen 4122 is fixed on the frame 4121, and the removal mechanism 45 includes several air guns 451 fixed on the top of the sedimentation tank 4, the air guns 451 are aimed at the filter screen 4122, the air guns 451 are used to connect to the air source 100, and an electromagnetic valve 452 is installed on the connecting pipe between the air gun 451 and the air source 100.

[0081] The filter screen 4122 is fixed on the frame 4121. This fixing method can ensure that the filter screen 4122 remains stable during the wastewater treatment process and is not prone to displacement or deformation, thereby ensuring the stability and continuity of the filtering effect, and can effectively intercept suspended matter, fibers and other impurities in the wastewater, and accelerate the removal efficiency.

[0082] Specifically, the water outlet assembly 42 includes a lifting gate plate 421 and a hydraulic cylinder 422. A lifting gate plate 421 that can be raised and lowered is installed on the side wall of the sedimentation tank 4. A serrated plate is installed on the top of the lifting gate plate 421. The hydraulic cylinder 422 is installed on the side wall of the sedimentation tank 4. The piston rod of the hydraulic cylinder 422 is fixedly connected to the lifting gate plate 421, and is used to drive the lifting gate plate 421 to rise and fall.

[0083] When the wastewater in the sedimentation tank 4 completes the sedimentation and filtration and other treatment processes, the supernatant needs to be discharged to the subsequent treatment unit. At this time, the hydraulic cylinder 422 is started, and the extension of the piston rod of the hydraulic cylinder 422 pushes the lifting gate 421 to slowly descend along the side wall of the sedimentation tank 4. As the lifting gate 421 descends, the serrated plate at its top also descends synchronously, so that the supernatant in the sedimentation tank 4 can flow out of the sedimentation tank 4 quickly. The water starts to be retained from the top and will not affect the impact on the sludge at the bottom.

[0084] A method for treating environmentally friendly fabric printing and dyeing wastewater, comprising the following steps:

[0085] S1, the printing and dyeing wastewater is introduced into the water storage tank 2 for water homogenization, and then the wastewater is distributed to the two flocculation tanks 3 by diversion to ensure alternating continuous treatment in the two tanks;

[0086] S2. Synchronously adding flocculant and magnetic powder into the flocculation tank 3, stirring to fully mix the flocculant and magnetic powder, thereby promoting the formation of magnetic flocs from suspended solids and dye impurities in the wastewater; the magnetic powder accelerates the subsequent sedimentation process by increasing the density of the flocs, and some unfused magnetic powder forms a suspension;

[0087] S3. After flocculation, the wastewater enters the corresponding sedimentation tank 4 and the treatment mechanism 41 is started:

[0088] S31. The magnetic chain 41114 in the conduit 4111 is located in the horizontal tube portion 41111 and magnetically attracts the magnetic flocs. Simultaneously, the lifting frame 411 drives the conduit 4111 and the filter assembly 412 downward, accelerating the flocs to settle to the bottom of the pool. At this time, the filter assembly 412 rotates to a vertical position to form a channel. The unabsorbed suspended matter floats up to the filter screen 4122 with the water flow.

[0089] S32: The plunger body 41115 is sucked by the air source 100, so that the magnetic block chain body 41114 enters the vertical tube portion 41112, and the magnetic flocs are separated and settled to the bottom of the pool;

[0090] S33, the filter assembly 412 rotates to a horizontal state and combines into a filter baffle; at the same time, the lifting frame 411 drives the filter baffle to rise, salvaging the suspended matter until the filter baffle is separated from the supernatant;

[0091] S34. The height of the outlet of the sedimentation tank 4 is adjusted by the hydraulic cylinder 422 to raise and lower the gate plate 421, so that the supernatant flows to the transition tank 5 by gravity, avoiding disturbing the sludge at the bottom. The filter assembly 412 is rotated 180 degrees and the suspension on the filter assembly 412 is blown off by the removal mechanism 45. The sludge scraping mechanism 44 scrapes the sludge at the bottom of the tank into the sludge discharge port 43 for recovery.

[0092] S4. The supernatant is buffered in the transition tank 5 and flows into the transition tank 5 by gravity, and then enters the oxidation tank 10, the secondary sedimentation tank 6, the BAF tank 7, the disinfection tank 8 in sequence, and finally enters the discharge tank for detection and discharge.

[0093] It should be noted that all directional indications in the embodiments of the present invention, such as up, down, left, right, front, back, etc., are only used to explain the relative position relationship and movement status between the components in a certain specific posture, as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0094] In addition, the descriptions of "first", "second", etc. in the present invention are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. At the same time, the meaning of "and / or" appearing in the full text is to include three solutions. Taking "A and / or B" as an example, it includes solution A, or solution B, or a solution in which both A and B are satisfied. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0095] The above components are all common standard parts or components known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.

[0096] The specific embodiments described herein are merely illustrative of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the present invention or exceeding the scope of the appended claims.

Claims

1. A fabric environmentally friendly printing and dyeing wastewater treatment system, characterized in that: The invention comprises at least a water storage tank (2), two flocculation tanks (3), two sedimentation tanks (4), a transition tank (5), an oxidation tank (10), a secondary sedimentation tank (6), a BAF tank (7), a disinfection tank (8), and a discharge tank (9) connected in sequence, wherein the two flocculation tanks (3) are simultaneously connected to the water storage tank (2), the two sedimentation tanks (4) are connected to the two flocculation tanks (3) in a one-to-one correspondence, and the two sedimentation tanks (4) are simultaneously connected to the transition tank (5); flocculants and magnetic powder are simultaneously added to the flocculation tanks (3); and each of the sedimentation tanks (4) is provided with a useful A treatment mechanism (41) is provided for accelerating the sedimentation of magnetic flocs and quickly removing suspended matter. The sedimentation tank (4) is provided with a water outlet assembly (42) that can be adjusted in height, and the water storage area of the transition tank (5) is lower than the water outlet assembly (42). The bottom of the sedimentation tank (4) is provided with a mud outlet (43) and a mud scraping mechanism (44) for scraping the bottom mud into the mud outlet (43). The top of the sedimentation tank (4) is provided with a removal mechanism (45) for removing the suspended matter from the treatment mechanism (41) and returning it to the bottom of the sedimentation tank (4). The processing mechanism (41) includes a lifting frame (411) and a driving assembly (413). The lifting frame (411) is arranged in the sedimentation tank (4) and can be lifted and lowered in the sedimentation tank (4). The driving assembly (413) is connected to the lifting frame (411) and is used to drive the lifting frame (411) to lift and lower. The lifting frame (411) is provided with a plurality of symmetrically arranged conduits (4111). The conduits (4111) have a horizontal pipe portion (41111) and a vertical pipe portion (41112). The horizontal pipe portion (41111) and the vertical pipe portion (41112) are connected via a bend portion (41113). A magnetic block chain body (41114) is provided in the conduit (4111) and a magnetic block chain body (41114) is connected at the end thereof. The plunger body (41115) is connected to the vertical tube portion (41112), and the plunger body (41115) is sealed with the inner wall of the vertical tube portion. When accelerating the sedimentation of the magnetic flocs, the magnetic chain body (41114) is at least partially located in the horizontal tube portion (41111) for adsorbing the magnetic flocs. When the magnetic flocs are separated, the magnetic chain body (41114) enters the vertical tube portion (41112) to cause the magnetic flocs located outside the horizontal tube portion (41111) to fall off. The upper end of the vertical tube portion (41112) is used to connect to the air source (100) for evacuating or inflating the vertical tube portion (41112) to control the height position of the plunger body (41115). A baffle (41116) is installed between the horizontal tube portion (41111) and the curved tube portion (41113), and the baffle (41116) is used to prevent the magnetic flocs from entering the vertical tube portion (41112); The catheter (4111) is made of non-magnetic material.

2. The fabric environmentally friendly printing and dyeing wastewater treatment system according to claim 1 is characterized in that: The processing mechanism further comprises a plurality of filter assemblies (412), wherein the plurality of filter assemblies (412) are rotatably arranged on a lifting frame (411), and the filter assemblies (412) are located above the horizontal pipe portion (41111), and adjacent filter assemblies (412) can form a channel for the unadsorbed suspension to pass through, or all the filter assemblies (412) are combined to form a horizontal filter partition, and a driven gear (414) is coaxially connected to the filter assembly (412). The lifting frame (411 ) is provided with a rack (415) which is slidably mounted on the lifting frame (411) and meshes with all driven gears (414); a tooth group (4151) is provided on the side of the rack (415) away from the driven gears (414); a first driving motor (416) is also fixed on the lifting frame (411); a driving gear (417) is fixed on the output shaft of the first driving motor (416); the first driving motor (416) meshes with the tooth group (4151) and is used to drive the filter assembly (412) to rotate.

3. The fabric environmentally friendly printing and dyeing wastewater treatment system according to claim 2 is characterized in that: The scraping mechanism (44) includes two scraping assemblies (441) symmetrically arranged at the bottom of the sedimentation tank (4), and the scraping assembly (441) includes a second drive motor (4411), a screw assembly (4412) and a scraper (4413). The second drive motor (4411) is installed outside the sedimentation tank (4), and the screw assembly (4412) is installed at the bottom of the sedimentation tank (4) and connected to the second drive motor (4411). The screw assembly (4412) is arranged along the bottom wall of the sedimentation tank (4), and the scraper (4413) is connected to the screw assembly (4412). The second drive motor (4411) drives the screw assembly (4412) to rotate and drives the scraper (4413) to move along the bottom wall of the sedimentation tank (4), and the scraper (4413) moves between the side wall of the sedimentation tank (4) and the mud outlet.

4. The fabric environmentally friendly printing and dyeing wastewater treatment system according to claim 1 is characterized in that: The driving assembly (413) includes a plurality of servo motors (4131) and a screw assembly (4132). The screw assembly (4132) includes a screw and a nut. The screw is rotatably arranged in the sedimentation tank (4). The nut is fixedly connected to a connecting frame. The connecting frame is connected to the lifting frame (411). The servo motor (4131) is connected to the screw to drive the screw to rotate.

5. The fabric environmentally friendly printing and dyeing wastewater treatment system according to claim 2 is characterized in that: The filter assembly (412) includes a frame (4121) and a filter screen (4122), wherein the filter screen (4122) is fixed to the frame (4121), and the removal mechanism (45) includes a plurality of air guns (451) fixed to the top of the sedimentation tank (4), wherein the air guns (451) are aimed at the filter screen (4122), and the air guns (451) are used to connect to the air source (100). A solenoid valve (452) is installed on the connecting pipe between the air guns (451) and the air source (100).

6. The fabric environmentally friendly printing and dyeing wastewater treatment system according to claim 2 is characterized in that: The water outlet assembly (42) comprises a lifting gate (421) and a hydraulic cylinder (422). A lifting gate (421) that can be lifted is installed on the side wall of the sedimentation tank (4). A sawtooth plate is installed on the top of the lifting gate (421). The hydraulic cylinder (422) is installed on the side wall of the sedimentation tank (4). The piston rod of the hydraulic cylinder (422) is fixedly connected to the lifting gate (421) and is used to drive the lifting gate (421) to move up and down.

7. A method for treating fabric environmentally friendly printing and dyeing wastewater according to any one of claims 2 to 6, characterized in that: The following steps are involved: S1, introducing the printing and dyeing wastewater into the water storage tank (2) for water homogenization, and then distributing the wastewater into two flocculation tanks (3) by diversion to ensure alternating continuous treatment in the two tanks; S2, adding flocculant and magnetic powder simultaneously in the flocculation tank (3), stirring to fully mix the flocculant and magnetic powder, so as to promote the formation of magnetic flocs from suspended matter and dye impurities in the wastewater; the magnetic powder accelerates the subsequent sedimentation process by increasing the density of the flocs, and some unfused magnetic powder forms a suspension; S3. After flocculation, the wastewater enters the corresponding sedimentation tank (4) and the treatment mechanism (41) is started: S31, the magnetic block chain (41114) in the conduit (4111) is located in the horizontal pipe portion (41111), and magnetic flocs are attracted by magnetic force. At the same time, the lifting frame (411) drives the conduit (4111) and the filter assembly (412) to descend, accelerating the flocs to settle to the bottom of the pool. At this time, the filter assembly (412) rotates to a vertical state to form a channel, and the suspended matter that is not attracted floats up to the filter screen (4122) along with the water flow; S32, the plunger body (41115) is sucked by the air source (100), so that the magnetic block chain body (41114) enters the vertical pipe part (41112), and the magnetic flocs are separated and settled to the bottom of the pool; S33, the filter assembly (412) rotates to a horizontal state and is assembled into a filter baffle; at the same time, the lifting frame (411) drives the filter baffle to rise, salvaging the suspended matter until the filter baffle is separated from the supernatant; S34, the height of the outlet of the sedimentation tank (4) is adjusted by the hydraulic cylinder (422) to lift the gate (421), so that the supernatant flows to the transition tank (5) by gravity, avoiding disturbing the bottom sludge; the filter assembly (412) is rotated 180 degrees and the suspended matter on the filter assembly (412) is blown off by the removal mechanism (45), and the sludge scraping mechanism (44) scrapes the sludge at the bottom of the tank into the sludge discharge port (43) for recovery; S4. The supernatant is buffered in the transition tank (5) and flows into the oxidation tank (10) by gravity. It then enters the secondary sedimentation tank (6), BAF tank (7), disinfection tank (8) in sequence, and finally enters the discharge tank for detection and discharge.

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