Fabric environment-friendly printing and dyeing wastewater treatment system and method thereof

Abstract

The invention provides an environment-friendly fabric printing and dyeing wastewater treatment system and method, and belongs to the technical field of wastewater treatment. An environment-friendly fabric printing and dyeing wastewater treatment system at least comprises 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 tank which are connected in sequence, the two flocculation tanks are connected to the water storage tank at the same time, the two sedimentation tanks are connected to the two flocculation tanks in a one-to-one correspondence mode, and the two sedimentation tanks are connected to the BAF tank in a one-to-one correspondence mode. The two sedimentation tanks are connected to the transition tank at the same time; adding a flocculating agent and magnetic powder into the flocculation basin at the same time; each sedimentation tank is internally provided with a treatment mechanism for accelerating sedimentation of magnetic flocs and rapidly removing suspensions, each sedimentation tank is internally provided with a water outlet assembly capable of being adjusted in height, and the water storage area of the transition tank is lower than the water outlet assembly. The sewage treatment device has the advantage of improving the sewage treatment efficiency.

Description

Technical Field

[0001] The present invention belongs to the technical field of wastewater treatment, and particularly relates to an environmentally friendly printing and dyeing wastewater treatment system for fabrics and a method thereof. Background Art

[0002] The present invention relates to a textile printing and dyeing wastewater treatment process. The existing process adopts a treatment flow of mechanical grille → 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 during actual operation.

[0003] To ensure the full sedimentation of difficult-to-settle substances such as fiber debris and loose flocs, the residence time of the primary sedimentation tank needs to be extended to 4 - 6 hours. The conventional design value is 2 - 4 hours. However, extending the residence time causes the flocs to stay in the tank for a long time and break, resulting in an increase in the suspended solid concentration. The formed flocculent masses are in a suspended state in the water due to density differences. After the non-settled suspended solids enter the biochemical system, the sludge load of the secondary sedimentation tank increases.

[0004] After adding magnetic powder, the sedimentation efficiency is significantly improved. However, there are problems of uneven mixing in the existing magnetic powder dosing system. There are differences in the magnetic region concentration in different areas of the tank body. The flocs and magnetic powder are not completely mixed, and there are also suspended solids of non-mixed magnetic powder. The sedimentation speed of the formed magnetic floc complex has not fully reached the ideal value. Summary of the Invention

[0005] The purpose of the present invention is to address the above problems existing in the prior art and propose an environmentally friendly printing and dyeing wastewater treatment system for fabrics, which has the characteristic of improving the sewage treatment efficiency.

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

[0007] An environmentally friendly printing and dyeing wastewater treatment system for fabrics includes at least a reservoir, 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 tank, which are connected in sequence. Among them, the two flocculation tanks are simultaneously connected to the reservoir, the two sedimentation tanks are respectively connected to the two flocculation tanks, and the two sedimentation tanks are simultaneously connected to the transition tank; a flocculant and magnetic powder are simultaneously put into the flocculation tanks; each sedimentation tank is provided with a treatment mechanism for accelerating the sedimentation of magnetic flocs and quickly removing suspended solids. An outlet assembly that can be adjusted in height is provided in the sedimentation tank, and the water storage area of the transition tank is lower than the outlet assembly. A sludge discharge port and a sludge scraping mechanism for scraping the bottom sludge into the sludge discharge port are provided at the bottom of the sedimentation tank. A removal mechanism for removing the suspended solids of the treatment mechanism and falling them back to the bottom of the sedimentation tank is provided at the top of the sedimentation tank.

[0008] In the above-mentioned fabric environmental protection printing and dyeing wastewater treatment system, the treatment mechanism includes a lifting frame and a driving component. The lifting frame is arranged in the sedimentation tank and can lift in the sedimentation tank. The driving component is connected to the lifting frame and is used to drive the lifting frame to lift. A number of symmetrically arranged conduits are provided on the lifting frame. The conduit has a horizontal pipe portion and a vertical pipe portion, and the horizontal pipe portion is connected to the vertical pipe portion through a bent pipe portion. A magnetic block chain body is arranged in the conduit, and a plunger body is connected to the end of the magnetic block chain body. The plunger body is arranged in the vertical pipe portion, and the plunger body is hermetically arranged with the inner wall of the vertical pipe body. When accelerating the sedimentation of magnetic flocs, at least part of the magnetic block chain body is located in the horizontal pipe portion to adsorb magnetic flocs. When separating the magnetic flocs, the magnetic block chain body enters the vertical pipe portion to make the magnetic flocs located outside the horizontal pipe portion fall off. The upper end of the vertical pipe portion is used to connect a gas source to pump air or inflate the vertical pipe portion to control the height position of the plunger body.

[0009] In the above-mentioned fabric environmental protection printing and dyeing wastewater treatment system, the treatment mechanism further includes a number of filtering components. The number of filtering components is rotatably arranged on the lifting frame, and the filtering components are located above the horizontal pipe portion. A channel for the unadsorbed suspension to pass through can be formed between adjacent filtering components, or all the filtering components are combined to form a horizontal filtering partition. A driven gear is coaxially connected to the filtering component. A rack is slidably arranged on the lifting frame and meshes with all the driven gears. A tooth group is arranged on the side of the rack away from the driven gear. A first driving motor is also fixed on the lifting frame. A driving gear is fixed on the output shaft of the first driving motor. The first driving motor meshes with the tooth group to drive the filtering component to rotate.

[0010] In the above-mentioned fabric environmental protection printing and dyeing wastewater treatment system, the magnetic block chain body includes a number of hinged frames hinged to each other, and a magnet is installed on each hinged frame.

[0011] In the above-mentioned fabric environmental protection printing and dyeing wastewater treatment system, the sludge scraping mechanism includes two sludge scraping components symmetrically arranged at the bottom of the sedimentation tank. The sludge scraping component includes a second driving motor, a lead screw assembly and a scraper. The second driving motor is installed outside the sedimentation tank. The lead screw assembly is installed at the bottom of the sedimentation tank and is connected to the second driving motor. The lead screw assembly is arranged along the bottom wall of the sedimentation tank. The scraper is connected to the lead screw assembly. The second driving motor drives the lead 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 environmental protection printing and dyeing wastewater treatment system, a baffle is installed between the horizontal pipe portion and the bent pipe portion. The baffle is used to block the magnetic flocs from entering the vertical pipe portion.

[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 a screw assembly, 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, 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 a plurality of 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 lift gate that can be lifted is installed on the side wall of the sedimentation tank. A serrated plate is installed on the top of the lift 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 lift gate for driving the lift gate to lift and lower.

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

[0018] S1, introduce the printing and dyeing wastewater into the reservoir for water homogenization, and then distribute the wastewater to two flocculation tanks through diversion to ensure alternating and continuous treatment in the two tanks;

[0019] S2. Add flocculant and magnetic powder simultaneously in the flocculation tank, stir to fully mix the flocculant and magnetic powder, and 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;

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

[0021] S31, the magnetic block chain in the conduit is located in the horizontal pipe part, and the magnetic flocs are attracted by magnetic force. At the same time, the lifting frame drives the conduit and the filter assembly to descend, accelerating the flocs to settle to the bottom of the pool. At this time, the filter assembly rotates to a vertical state to form a channel, and the suspended matter that is not attracted floats to the filter screen with the water flow;

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

[0023] S33. The filtering components rotate to the horizontal state and are combined into a filtering partition; meanwhile, the lifting frame drives the filtering partition to rise to salvage the suspended matter until the filtering partition is separated from the supernatant liquid.

[0024] S34. The height of the water outlet of the sedimentation tank adjusts the lifting sluice through the hydraulic cylinder to make the supernatant liquid flow to the transition tank by gravity, avoiding disturbing the bottom sludge; rotate the filtering components by 180° and blow off the suspended matter on the filtering components through the removing mechanism, and the sludge scraping mechanism scrapes the sludge at the bottom of the tank into the sludge discharge port for recovery.

[0025] S4. The supernatant liquid flows into the oxidation tank by gravity after buffering in the transition tank, and then successively enters the secondary sedimentation tank, the BAF tank, the disinfection tank, and finally enters the discharge tank for detection and then is discharged. Compared with the prior art, the present application has the following advantages:

[0026] Through the synergistic effect of magnetic powder and flocculant in the flocculation tank, as well as the cooperation of the sedimentation tank treatment mechanism and the adjustable water outlet component, this system significantly improves the sedimentation efficiency, reduces the sedimentation time, and comprehensively optimizes the printing and dyeing wastewater treatment process. The double flocculation tanks and the sedimentation tank operate alternately to achieve continuous treatment. Moreover, the cleaning of the flocculation tank and the sedimentation tank is more convenient, and there is no need to stop production for treatment, and it can be directly cleaned during the alternate use stage. Description of the Drawings

[0027] Figure 1 is the layout structure diagram of the wastewater treatment system in the present application;

[0028] Figure 2 is a three-dimensional structure diagram of the sedimentation tank in the present application;

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

[0030] Figure 4 is Figure 3 a sectional structure diagram at the A-A position in

[0031] Figure 5 is Figure 3 a sectional structure diagram at the B-B position in

[0032] Figure 6 is the structure diagram when the treatment mechanism descends and the filtering components are in the vertical state in the present application;

[0033] Figure 7 is the structural schematic diagram of the sedimentation tank including the removing mechanism in the present application;

[0034] In the figure,

[0035] 100. Air source;

[0036] 2. Reservoir;

[0037] 3. Flocculation tank;

[0038] 4. Sedimentation tank;

[0039] 41. Treatment mechanism; 411. Lifting frame; 4111. Conduit; 41111. Horizontal pipe section; 41112. Vertical pipe section; 41113. Elbow pipe section; 41114. Magnetic block chain; 41115. Plunger body; 41116. Baffle;

[0040] 412. Filter assembly; 4121. Frame; 4122. Filter screen;

[0041] 413. Driving assembly; 4131. Servo motor; 4132. Lead screw assembly;

[0042] 414. Driven gear; 415. Rack; 4151. Tooth group; 416. First driving motor; 417. Driving gear;

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

[0044] 43. Sludge discharge port;

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

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

[0047] 5. Transition tank;

[0048] 6. Secondary sedimentation tank;

[0049] 7. BAF tank;

[0050] 8. Disinfection tank;

[0051] 9. Discharge trough;

[0052] 10. Oxidation tank; Detailed implementation manners

[0053] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0054] As Figures 1 to 7As shown in the figure, an environmentally friendly printing and dyeing wastewater treatment system includes at least a reservoir 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. Among them, the two flocculation tanks 3 are simultaneously connected to the reservoir 2, the two sedimentation tanks 4 are respectively connected to the two flocculation tanks 3, and the two sedimentation tanks 4 are simultaneously connected to the transition tank 5; a flocculant and magnetic powder are simultaneously put into the flocculation tank 3; each sedimentation tank 4 is provided with a treatment mechanism 41 for accelerating the sedimentation of magnetic powder and rapidly removing suspended solids. An adjustable outlet assembly 42 is provided in the sedimentation tank 4 in terms of height, and the water storage area of the transition tank 5 is lower than the outlet assembly 42. A sludge discharge port 43 is provided at the bottom of the sedimentation tank 4, and a sludge scraping mechanism 44 is provided for scraping the bottom sludge into the sludge discharge port 43. A removal mechanism 45 is provided at the top of the sedimentation tank 4 for removing the suspended solids of the treatment mechanism 41 and falling back to the bottom of the sedimentation tank 4.

[0055] In the printing and dyeing wastewater treatment system of this application, two flocculation tanks 3 and two sedimentation tanks 4 are innovatively arranged, significantly improving the wastewater treatment efficiency.

[0056] The printing and dyeing wastewater first flows into the reservoir 2, where preliminary storage and water quality homogenization are completed. Subsequently, the wastewater simultaneously enters the two flocculation tanks 3. In the flocculation tanks 3, the flocculant and magnetic powder are put in synchronously. The flocculant promotes the aggregation of impurities in the wastewater into flocs, and the magnetic powder increases the weight of the flocs, accelerating the sedimentation process.

[0057] The flocculated wastewater respectively flows into the corresponding sedimentation tanks 4. Different from traditional horizontal, vertical, and radial sedimentation tanks 4, in this application, between the two flocculation tanks 3 and the reservoir 2, and between the two flocculation tanks 3 and the sedimentation tanks 4, water pumps are separately arranged. The water inlet and drainage of the sedimentation tanks 4 in this system are independent of each other. After the wastewater in the flocculation tank 3 fills the sedimentation tank 4, the water pump between the two is disconnected. When a flocculation tank reaches the preset liquid level, the corresponding water pump is closed and the treatment process of the corresponding sedimentation tank is started, and 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 substances, avoiding the disturbance of the water inlet. The treatment mechanism 41 in the sedimentation tank 4 plays a key role. It can not only quickly transfer the flocculent precipitate containing magnetic powder to the bottom of the tank, but also directly salvage the suspended solids suspended in the water, greatly compressing the sedimentation work that originally took several hours, and the sedimentation efficiency is greatly improved. At the same time, the height of the outlet assembly 42 in the sedimentation tank 4 is adjustable, and the supernatant can be quickly discharged into the transition tank 5 and sent to the oxidation tank 10 through the transition tank 5, further improving the preliminary treatment efficiency. It is worth mentioning that due to the design that the transition tank 5 is lower than the outlet assembly 42, the wastewater can flow into the transition tank 5 by gravity, reducing the use of equipment such as lift pumps, and the drainage process starts from the top supernatant and will not affect the bottom sludge area.

[0058] In the oxidation pond 10, the wastewater undergoes biochemical oxidation treatment to decompose organic pollutants, and then successively passes through the secondary sedimentation tank 6 for sludge-water separation, the BAF pond for deep purification, and the disinfection tank 8 for sterilization, and finally reaches the standard for discharge in the discharge tank 9. In this application, the specific sewage transfer method between each pool is the prior art and will not be elaborated in detail here.

[0059] Two flocculation ponds 3 and two sedimentation ponds 4 are provided to achieve staggered operation. When one flocculation pond 3 is performing flocculation operations, the other can receive new sewage through the reservoir 2; when one flocculation pond 3 finishes flocculation and drains into the sedimentation pond 4, the other sedimentation pond 4 is discharging the separated supernatant into the transition pond 5. This design effectively avoids the interference of the incoming water of the traditional sedimentation pond 4 on the bottom sediment, greatly improving the operation efficiency and stability of the entire system.

[0060] Furthermore, the sludge discharge port 43 of the sedimentation pond 4 and the sludge scraping mechanism 44 for scraping the bottom sludge into the sludge discharge port 43 are the prior art and will not be elaborated in detail here.

[0061] Moreover, the reservoir 2, the two flocculation ponds 3, the oxidation pond 10, the secondary sedimentation tank 6, the BAF pond 7, the disinfection tank 8, and the discharge tank 9 in this application are the prior art, and the transition pond 5 is only for buffering the water before it enters the oxidation pond 10.

[0062] In summary, through the synergistic effect of magnetic powder and flocculant in the flocculation pond 3 and the cooperation of the treatment mechanism 41 and the adjustable water outlet assembly 42 in the sedimentation pond 4, this system significantly improves the sedimentation efficiency, reduces the sedimentation time, and comprehensively optimizes the printing and dyeing wastewater treatment process. The two flocculation ponds 3 and the sedimentation ponds 4 operate alternately to achieve continuous treatment. Moreover, the cleaning of the flocculation pond 3 and the sedimentation pond 4 is more convenient, and there is no need to stop production for treatment, and it can be directly cleaned during the alternate use stage. In the solution of this application, a magnetic separator also needs to be configured to separate the magnetic powder for reuse, but this technical solution has been fully disclosed and will not be elaborated in detail here.

[0063] Specifically, the processing mechanism 41 includes a lifting frame 411 and a driving assembly 413. The lifting frame 411 is disposed 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. A number of symmetrically arranged conduits 4111 are provided on the lifting frame 411. The conduit 4111 has 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 bent pipe portion 41113. A magnetic block chain body 41114 is disposed in the conduit 4111, and a plunger body 41115 is connected to the end of the magnetic block chain body 41114. The plunger body 41115 is disposed in the vertical pipe portion 41112, and the plunger body 41115 is hermetically arranged with the inner wall of the vertical pipe body. When accelerating the settlement of magnetic flocs, at least a part of the magnetic block chain body 41114 is located in the horizontal pipe portion 41111 for adsorbing magnetic flocs. When separating the magnetic flocs, the magnetic block chain body 41114 enters the vertical pipe portion 41112 to cause the magnetic flocs located outside the horizontal pipe portion 41111 to fall off. The upper end of the vertical pipe portion 41112 is used to connect to the air source 100 for evacuating or inflating the vertical pipe portion 41112 to control the height position of the plunger body 41115. The processing mechanism further includes a number of filter assemblies 412. The number of filter assemblies 412 is rotatably disposed on the lifting frame 411, and the filter assemblies 412 are located above the horizontal pipe portion 41111. A channel for the unadsorbed suspension to pass through can be formed between adjacent filter assemblies 412, or all the filter assemblies 412 are combined to form a horizontal filter partition. A driven gear 414 is coaxially connected to the filter assembly 412. A rack 415 is slidably disposed on the lifting frame 411 and meshes with all the driven gears 414. A tooth group 4151 is provided on the side of the rack 415 away from the driven gear 414. A first driving motor 416 is further 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.

[0064] In this application, the printing and dyeing wastewater flows into the primary sedimentation tank 4 after being treated in the flocculation tank 3. Then, the driving assembly 413 is started. At this time, at least a part of the magnetic block chain body 41114 in the conduit 4111 is located in the horizontal pipe portion 41111. Since the magnetic block chain body 41114 has magnetism, it can quickly adsorb the flocs formed by flocculation in the wastewater and containing magnetic powder at a short distance. A large number of magnetic flocs gather outside the horizontal pipe portion 41111 or in the direction close to the horizontal pipe. As the adsorption amount increases, the driving assembly 413 drives the lifting frame 411 to descend synchronously, accelerating the settlement of the magnetic flocs to the bottom of the sedimentation tank 4. During the descent of the lifting frame 411, the filtering assembly 412 rotates to a vertical state. There are channels between adjacent rotating assemblies. Those flocs or floating substances that cannot be attracted by the magnetic block chain body 41114 can pass through the channels on the connecting frame and move above the installation frame until the horizontal pipe portion 41111 descends to a position close to the bottom of the sedimentation tank 4, and the sedimentation effect reaches the best.

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

[0066] After the settlement and separation of the magnetic flocs are completed, the driving assembly 413 controls the lifting frame 411 to rise. During the rising process, all the filtering assemblies 412 rotate to a horizontal state and are combined into a filtering partition, enabling the filtering assembly 412 to enter the working state. The suspended solids in the wastewater pass through the filtering assembly 412 under the drive of the water flow, and the suspended solids are intercepted by the filtering assembly 412, further purifying the wastewater.

[0067] This treatment mechanism 41 demonstrates many advantages during the working process. By virtue of the adsorption characteristics of the magnetic block chain body 41114 for magnetic flocs, the magnetic block chain body 41114 approaches the magnetic flocs at a short distance, greatly promoting the descent of the flocs with magnetic powder following the magnetic block chain body 41114. Compared with the traditional sedimentation method, it significantly accelerates the sedimentation speed of the magnetic flocs, greatly shortens the sedimentation time, effectively improves the sedimentation efficiency, and further comprehensively optimizes the operating efficiency of the entire wastewater treatment system. In addition, by precisely controlling the position of the plunger body 41115 through the air source 100, the position conversion of the magnetic block chain body 41114 is realized, enabling the magnetic flocs to conveniently separate from the magnetic block chain body 41114 and settle to the bottom of the tank. This not only facilitates the recycling of the magnetic flocs but also is conducive to the cleaning and maintenance of the magnetic block chain body 41114 to ensure its continuous and stable operation. The water inlet and outlet efficiency of the sedimentation tank 4 is also greatly improved, thus shortening the treatment duration of this step.

[0068] Specifically, the magnetic block chain body 41114 includes a number of articulated frames that are hinged to each other, and magnets are installed on each articulated frame.

[0069] Since the magnetic block chain body 41114 is composed of independent articulated frames, if some magnets are damaged or their adsorption capacity decreases, the corresponding articulated 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 pipe portion 41111 to the vertical pipe portion 41112.

[0070] Specifically, the sludge scraping mechanism 44 includes two sludge scraping components 441 symmetrically arranged at the bottom of the sedimentation tank 4. The sludge scraping component 441 includes a second driving motor 4411, a lead screw assembly 4412, and a scraper 4413. The second driving motor 4411 is installed outside the sedimentation tank 4, the lead screw assembly 4412 is installed at the bottom of the sedimentation tank 4 and is connected to the second driving motor 4411. The lead screw assembly 4412 is arranged along the bottom wall of the sedimentation tank 4. The scraper 4413 is connected to the lead screw assembly 4412. The second driving motor 4411 drives the lead 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 sludge outlet.

[0071] Through the sludge scraping mechanism 44, the sludge at the bottom of the sedimentation tank 4 can be sent into the sludge outlet, so that part of the sludge deposited in the sedimentation tank 4 each time can be recycled, thus facilitating the preparation for quickly filling sewage next time.

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

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

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

[0075] The conduit 4111 made of non-magnetic material will not interfere with the magnetic field distribution of the magnetic block chain body 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 block chain body 41114 and accurately gather on the outside of the horizontal pipe portion 41111.

[0076] The non-magnetic materials are materials such as polypropylene (PP), austenitic stainless steels like 304 and 316L, and alumina ceramics.

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

[0078] The servo motor 4131 outputs precise rotational power to drive the connected lead screw 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 lead screw drives the nut to move axially downward along the lead screw. During this process, the nut drives the connecting frame and the connected lifting frame 411 to descend synchronously, so that the magnetic block chain 41114 in the conduit 4111 gradually penetrates to a suitable position in the wastewater, creating conditions for adsorbing magnetic flocs.

[0079] After a series of processes such as magnetic floc adsorption sedimentation and suspension filtration are completed, it is necessary to raise the lifting frame 411. At this time, the control system reversely drives the servo motor 4131 to drive the lead screw to rotate reversely. Under the reverse rotation of the lead screw, the nut moves axially upward along the lead screw, and then drives the connecting frame and the lifting frame 411 to rise synchronously.

[0080] In the above fabric environmental protection printing and dyeing wastewater treatment system, the filtering assembly 412 includes a frame body 4121 and a filter net 4122. The filter net 4122 is fixed on the frame body 4121. The removing mechanism 45 includes a plurality of air guns 451 fixed on the top of the sedimentation tank 4. The air guns 451 are aligned with the filter net 4122. The air guns 451 are used to connect to the air source 100, and a solenoid valve 452 is installed on the connecting pipeline between the air guns 451 and the air source 100.

[0081] The filter net 4122 is fixed on the frame body 4121. This fixing method can ensure that the filter net 4122 remains stable during the wastewater treatment process, is not prone to displacement or deformation, thereby ensuring the stability and continuity of the filtering effect, effectively intercepting impurities such as suspended solids and fibers in the wastewater, and accelerating the removal efficiency.

[0082] Specifically, the water outlet assembly 42 includes a lifting gate 421 and a hydraulic cylinder 422. A liftable lifting gate 421 is installed on the side wall of the sedimentation tank 4. A serrated plate is installed at 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 for driving the lifting gate 421 to lift.

[0083] After the wastewater in the sedimentation tank 4 has completed the treatment processes such as sedimentation and filtration, it is necessary to discharge the supernatant 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 plate 421 to slowly descend along the side wall of the sedimentation tank 4. As the lifting gate plate 421 descends, the serrated plate at its top also descends synchronously, enabling the supernatant in the sedimentation tank 4 to flow out quickly from the sedimentation tank 4. The water flows out from the top, without affecting the bottom sludge.

[0084] A method for treating environmentally friendly printing and dyeing wastewater of fabrics includes the following steps:

[0085] S1. Introduce the printing and dyeing wastewater into the reservoir 2 for water quality homogenization, and then distribute the wastewater to two flocculation tanks 3 through shunting to ensure continuous alternating treatment of the two tanks;

[0086] S2. Synchronously add a flocculant and magnetic powder into the flocculation tank 3, and fully mix the flocculant and magnetic powder through stirring to promote the formation of magnetic flocs from the suspended solids and dye impurities in the wastewater; the magnetic powder accelerates the subsequent sedimentation process by increasing the density of the flocs, and part of the un-fused magnetic powder forms a suspension;

[0087] S3. The wastewater after flocculation enters the corresponding sedimentation tank 4 respectively, and start the treatment mechanism 41:

[0088] S31. The magnetic block chain body 41114 in the conduit 4111 is located in the horizontal pipe part 41111, adsorbing the magnetic flocs by magnetic force. At the same time, the lifting frame 411 drives the conduit 4111 and the filtering component 412 to descend, accelerating the sedimentation of the flocs to the bottom of the tank. At this time, the filtering component 412 rotates to a vertical state to form a channel, and the un-adsorbed suspension floats up to the filter net 4122 with the water flow;

[0089] S32. Suction the plunger body 41115 through the air source 100 to make the magnetic block chain body 41114 enter the vertical pipe part 41112, and the magnetic flocs are separated and settle to the bottom of the tank;

[0090] S33. The filtering component 412 rotates to a horizontal state and combines into a filtering partition; at the same time, the lifting frame 411 drives the filtering partition to rise to salvage the suspension until the filtering partition is separated from the supernatant;

[0091] S34. Adjust the lifting gate plate 421 through the hydraulic cylinder 422 at the water outlet of the sedimentation tank 4 to make the supernatant flow to the transition tank 5 by self-flow, avoiding disturbing the bottom sludge; rotate the filtering component 412 by 180° and blow off the suspension on the filtering component 412 through the removing 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;

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

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

[0094] In addition, the descriptions involving "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 specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. At the same time, the meaning of "and / or" appearing throughout the text is that it includes three scenarios. Taking "A and / or B" as an example, it includes scenario A, or scenario B, or the scenario where A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

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

[0096] The specific embodiments described herein are merely illustrative of the present invention. Those skilled in the art of the present invention can make various modifications or supplements to the described specific embodiments or use similar ways to replace them, but will not deviate from the present invention or exceed the scope defined by the appended claims.

Claims

1. A fabric environmentally friendly printing and dyeing wastewater treatment system, characterized in that: The invention at least comprises 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) which are 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 powders are simultaneously added to the flocculation tanks (3); and each of the sedimentation tanks (4) is provided with a 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 sludge outlet (43) and a sludge scraping mechanism (44) for scraping the bottom sludge into the sludge 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).

2. The fabric environmentally friendly printing and dyeing wastewater treatment system according to claim 1 is characterized in that: The processing mechanism (41) comprises 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 bent pipe portion (41113). A magnetic block chain body (41114) and a magnetic block chain body (41114) are provided in the conduit (4111). 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 make the magnetic flocs located outside the horizontal tube portion (41111) 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).

3. The fabric environmentally friendly printing and dyeing wastewater treatment system according to claim 2 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 channels for the unabsorbed suspension to pass through can be formed between adjacent filter assemblies (412), 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 assemblies (412), and the lifting frame (41111) is provided with a plurality of filter assemblies (412). ) is slidably provided 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.

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

5. The fabric environmentally friendly printing and dyeing wastewater treatment system according to claim 3 is characterized in that: 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).

6. The fabric environmentally friendly printing and dyeing wastewater treatment system according to claim 4 is characterized in that: The conduit (4111) is made of non-magnetic material.

7. 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), wherein the screw assembly (4132) includes a screw and a nut, wherein the screw is rotatably arranged in the sedimentation tank (4), the nut is fixedly connected to the connecting frame, and the servo motor (4131) is connected to the screw to drive the screw to rotate.

8. The fabric environmentally friendly printing and dyeing wastewater treatment system according to claim 3 is characterized in that: The filter assembly (412) comprises a frame (4121) and a filter screen (4122), wherein the filter screen (4122) is fixed on the frame (4121), and the removal mechanism (45) comprises a plurality of air guns (451) fixed on 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 an air source (100), and an electromagnetic valve (452) is installed on a connecting pipe between the air gun (451) and the air source (100).

9. The fabric environmentally friendly printing and dyeing wastewater treatment system according to claim 3 is characterized in that: The water outlet assembly (42) comprises a lifting gate plate (421) and a hydraulic cylinder (422); a lifting gate plate (421) that can be lifted and lowered is installed on the side wall of the sedimentation tank (4); a sawtooth 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); a 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 lift and lower.

10. A method for treating fabric environmentally friendly printing and dyeing wastewater according to any one of claims 3-8, 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 to two flocculation tanks (3) by diversion to ensure alternating and 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 part (41111), and the 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 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, and salvages the suspended body until the filter baffle is separated from the supernatant; S34, the height of the water outlet of the sedimentation tank (4) is adjusted by the hydraulic cylinder (422) to lift the gate plate (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 suspension on the filter assembly (412) is blown off by the removal mechanism (45), and the sludge scraping mechanism (44) scrapes the sludge on 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 by gravity into the oxidation tank (10), and 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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