Printing and dyeing wastewater recycling device

Abstract

The invention relates to the technical field of wastewater treatment, and discloses a printing and dyeing wastewater recycling device which comprises a reaction kettle, a liquid conveying mechanism is arranged on the reaction kettle, and the liquid conveying mechanism is used for injecting printing and dyeing wastewater and a coagulant into the reaction kettle; a rotary drum is rotatably mounted in the reaction kettle, and after the printing and dyeing wastewater and a coagulant are subjected to precipitation reaction in the reaction kettle, a mixed solution is centrifugally separated through the rotary drum, so that cyclic utilization of the printing and dyeing wastewater is realized; a light-phase weir plate is fixedly mounted in the rotary drum, and an adjustable heavy-phase weir plate is mounted on the light-phase weir plate in a sliding manner. According to the printing and dyeing wastewater recycling device, a set of real-time adjusting mechanism based on hydraulic feedback is integrated in the centrifugal drum, and the heavy phase weir plate is automatically driven to lift by sensing the pressure change at a separation interface, so that the variable separation working condition is intelligently adapted, and the separation efficiency and the stability are remarkably improved.

Description

Technical Field

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

[0002] In the field of dyeing and printing wastewater treatment, achieving efficient separation of water and pollutants is crucial for resource recovery and reuse. Centrifuges, as one of the core pieces of equipment, rely on the centrifugal force generated by the high-speed rotation of the drum to separate the light and heavy phases within the drum, which are then collected separately via weirs of fixed height for the light and heavy phases. However, the effectiveness of this technology heavily depends on one prerequisite: the precise matching of the weir height with the position of the light and heavy phase interface formed in real time within the drum.

[0003] In actual dyeing and printing production, wastewater quality fluctuates greatly, and the types and concentrations of dissolved substances such as dyes, auxiliaries, and salts frequently change, leading to significant uncertainty in the density of the mixture entering the centrifuge. This density variation directly alters the radial distribution and interface position of the light and heavy phase liquid rings in the centrifugal force field. Faced with this dynamically changing separation interface, traditional fixed weirs or weirs requiring manual adjustment during shutdown are inadequate. If the weir is too high, some heavy phase sludge will mix into the light phase effluent, affecting the quality of reclaimed water; if the weir is too low, some heavy phase will not be effectively collected and will overflow with the light phase, resulting in incomplete separation and pollutant residue. This contradiction constitutes a prominent defect in existing technology: the mismatch between the static height setting of the weir and the dynamic separation conditions severely restricts the stability of separation efficiency and the level of automation.

[0004] Therefore, there is an urgent need in the field for an innovative solution that enables the heavy phase weir plate to "sense" the actual separation state inside the drum and dynamically adjust its own height accordingly, thereby achieving adaptive optimization of the separation process. This is the core technical problem that this invention aims to solve. Summary of the Invention

[0005] This invention provides a device for recycling dyeing and printing wastewater, which integrates a real-time adjustment mechanism based on hydraulic feedback inside a centrifugal drum. By sensing pressure changes at the separation interface, it automatically drives the heavy phase weir plate to rise and fall, thereby intelligently adapting to changing separation conditions and achieving the beneficial effect of significantly improving separation efficiency and stability, thus solving the problems mentioned in the background art.

[0006] The present invention provides the following technical solution: a device for recycling dyeing and printing wastewater, comprising a reaction vessel, wherein a liquid delivery mechanism is provided on the reaction vessel, the liquid delivery mechanism being used to inject dyeing and printing wastewater and coagulant into the reaction vessel;

[0007] The reactor is equipped with a rotating drum. After the dyeing and printing wastewater and coagulant undergo a precipitation reaction in the reactor, the mixture is centrifuged through the rotating drum to achieve the recycling of the dyeing and printing wastewater.

[0008] A light phase weir plate is fixedly installed inside the drum, and an adjustable heavy phase weir plate is slidably installed on the light phase weir plate, with an annular groove formed between the adjustable heavy phase weir plate and the light phase weir plate.

[0009] A membrane box is fixedly installed on the inner wall of the drum, and a diaphragm is slidably installed inside the membrane box. The position of the diaphragm corresponds to the liquid level boundary between the light phase and the heavy phase during centrifugal separation of the mixture. The chute is filled with hydraulic oil and is connected to the inner cavity of the membrane box to form a closed hydraulic circuit.

[0010] When the content of sediment in the dyeing and printing wastewater changes, the boundary line between the light and heavy phases shifts, causing the diaphragm to shift due to pressure changes. This, in turn, drives the adjustable heavy phase weir plate to rise and fall via the hydraulic oil in the hydraulic circuit, thereby adjusting the height of the adjustable heavy phase weir plate.

[0011] As an optional embodiment of the dyeing and printing wastewater recycling device of the present invention, the reactor is further provided with a second adjustment mechanism, which is used to adjust the height of the adjustable heavy phase weir plate according to the density of the input dyeing and printing wastewater.

[0012] The second regulating mechanism includes a second metering pump and a pressure control assembly. A first connecting pipe is fixedly installed on the second metering pump, and a second connecting pipe is fixedly installed on the first connecting pipe.

[0013] The pressure control component uses the second metering pump to hydraulically control the connection between the first connecting pipe and the second connecting pipe by inputting wastewater into the first connecting pipe.

[0014] As an optional solution of the dyeing and printing wastewater recycling device of the present invention, the second adjusting mechanism further includes a piston slidably installed in the first connecting pipe, and a second connecting plate is fixedly installed on the piston;

[0015] A first connecting plate is slidably mounted on the adjustable heavy phase weir plate. The piston rises and falls according to the volume of wastewater in the first connecting pipe when the pressure control component is triggered, and performs reverse transmission with the first connecting plate through the transmission component to complete the adjustment of the height of the adjustable heavy phase weir plate.

[0016] As an optional embodiment of the dyeing and printing wastewater recycling device of the present invention, a wastewater pipe and a coagulant conveying pipe are fixedly installed on the lower side of the reactor, and a first output pipe and a second output pipe are provided on the upper side of the reactor.

[0017] The reactor is provided with a reaction chamber, a light phase collection chamber and a heavy phase collection chamber from bottom to top. The first output pipe is connected to the light phase collection chamber and the second output pipe is connected to the heavy phase collection chamber.

[0018] As an optional solution of the dyeing and printing wastewater recycling device of the present invention, the liquid delivery mechanism further includes a first metering pump, which is fixedly connected to the wastewater pipeline, and a first liquid delivery pipeline is provided on the first metering pump for inputting coagulant.

[0019] The second metering pump is equipped with a second infusion pipeline for inputting wastewater, and the second connecting pipeline is connected to the coagulant delivery pipeline.

[0020] As an optional embodiment of the dyeing and printing wastewater recycling device of the present invention, the pressure control component includes a main valve core fixedly installed in the first connecting pipe, an overflow valve core slidably installed on the main valve core, and a first spring sleeved on the overflow valve core for providing elastic force to the overflow valve core.

[0021] As an optional solution of the dyeing and printing wastewater recycling device of the present invention, the pressure control component further includes a mounting seat threadedly connected to the first connecting pipe, a spring seat rotatably mounted on the mounting seat, and the overflow valve core slidably connected to the spring seat.

[0022] One end of the first spring is fixedly connected to the overflow valve core, and the other end of the first spring is fixedly connected to the spring seat.

[0023] As an optional embodiment of the dyeing and printing wastewater recycling device of the present invention, the transmission assembly includes a rotating rod rotatably mounted on the reactor, a first transmission plate fixedly mounted on the rotating rod, and two second transmission plates symmetrically slidably mounted on the first transmission plate, the two second transmission plates being respectively hinged to the first connecting plate and the second connecting plate via hinge shafts.

[0024] As an optional embodiment of the dyeing and printing wastewater recycling device of the present invention, a ratchet is fixedly installed on the rotating rod, an installation plate is fixedly installed on the overflow valve core through a third connecting plate, a pawl is fixedly installed on the installation plate, and the pawl engages with the ratchet.

[0025] As an optional embodiment of the dyeing and printing wastewater recycling device of the present invention, a motor is fixedly installed on the reaction vessel, a rotating shaft is fixedly connected to the output shaft of the motor, a fixing plate is fixedly installed on the drum, and the rotating shaft is fixedly connected to the fixing plate.

[0026] The present invention has the following beneficial effects:

[0027] 1. This dyeing and printing wastewater recycling device achieves closed-loop intelligent control of the separation process, improving treatment accuracy and stability. A membrane box and membrane sheet are installed on the inner wall of the rotating drum, positioned directly opposite the theoretical separation interface. When the actual separation interface shifts due to fluctuations in the influent water quality, the centrifugal hydraulic pressure acting on the membrane sheet immediately changes. This pressure signal is transmitted without delay through a closed hydraulic circuit (composed of a chute and internal hydraulic oil), directly driving the adjustable heavy phase weir plate to compensate for its lifting and lowering. This mechanism forms a real-time closed-loop feedback of "interface shift → pressure change → weir plate adjustment → interface reset," ensuring that the weir plate height automatically tracks the optimal separation point, fundamentally solving the problem of mismatch between static weir plates and dynamic operating conditions, and ensuring the purity of the effluent and the thoroughness of the separation.

[0028] 2. This dyeing and printing wastewater recycling device constructs a dual-layer intelligent adjustment system that combines "predictive coarse adjustment" with "real-time fine adjustment," greatly expanding the range of operating conditions it can adapt to. It organically combines preliminary position setting based on influent density pre-analysis (achieved through the second adjustment mechanism) with fine-tuning based on real-time operating conditions (achieved through the first adjustment mechanism).

[0029] 3. Before separation begins, this dyeing and printing wastewater recycling device can pre-adjust the weir to a reasonable reference height based on the physical properties of the wastewater sample. During the separation process, the system can also make fine corrections without stopping for unforeseen instantaneous fluctuations. This dual guarantee strategy of "coarse adjustment + fine adjustment" enables the device to exhibit excellent adaptability and robustness when facing dyeing and printing wastewater with complex composition and drastic fluctuations, ensuring optimal separation results under different production batches and operating conditions. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0031] Figure 2 This is a schematic diagram of the working process inside the reactor in this invention.

[0032] Figure 3 This is a schematic diagram of the first overall cross-sectional structure of the present invention.

[0033] Figure 4 for Figure 3 A magnified view of a portion of point A in the middle.

[0034] Figure 5 This is a schematic diagram of the second overall cross-sectional structure of the present invention.

[0035] Figure 6 for Figure 5 A magnified view of a section at point B in the middle.

[0036] Figure 7 This is a schematic diagram of a partial explosion at the reactor in this invention.

[0037] Figure 8 This is a schematic diagram of a partial explosion at the pressure control component in this invention.

[0038] Figure 9 This is a schematic diagram of a partial explosion at the adjustment component in this invention.

[0039] In the diagram: 1. Reactor; 2. Rotary drum; 3. Light phase weir plate; 4. Adjustable heavy phase weir plate; 5. Chute; 6. Membrane box; 7. Membrane sheet; 8. Second metering pump; 9. First connecting pipe; 10. Second connecting pipe; 11. Piston; 12. Second connecting plate; 13. First connecting plate; 14. Wastewater pipe; 15. Coagulant conveying pipe; 16. First output pipe; 17. Second output pipe; 18. Reaction chamber; 19. Light phase collector. 20. Collection chamber; 21. First metering pump; 22. First infusion pipeline; 23. Second infusion pipeline; 24. Main valve core; 25. Overflow valve core; 26. First spring; 27. Mounting base; 28. Spring seat; 29. ​​Rotating rod; 30. First transmission plate; 31. Second transmission plate; 32. Ratchet; 33. Third connecting plate; 34. Mounting disc; 35. Pawl; 36. Motor; 37. Rotating shaft; 38. Fixing plate. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] Example 1, please refer to Figures 1-9 A device for recycling dyeing and printing wastewater includes a reaction vessel 1, on which a liquid delivery mechanism is provided. The liquid delivery mechanism is used to inject dyeing and printing wastewater and coagulant into the reaction vessel 1.

[0042] A rotating drum 2 is installed inside the reactor 1. After the dyeing and printing wastewater and coagulant undergo a precipitation reaction in the reactor 1, the mixture is centrifuged and separated by the rotating drum 2, thereby realizing the recycling of the dyeing and printing wastewater.

[0043] A light phase weir plate 3 is fixedly installed inside the drum 2. An adjustable heavy phase weir plate 4 is slidably installed on the light phase weir plate 3, and an annular groove 5 is provided between the adjustable heavy phase weir plate 4 and the light phase weir plate 3.

[0044] A diaphragm box 6 is fixedly installed on the inner wall of the drum 2. A diaphragm 7 is slidably installed inside the diaphragm box 6. The position of the diaphragm 7 corresponds to the liquid level boundary between the light phase and the heavy phase during centrifugal separation of the mixture. The slide 5 is filled with hydraulic oil and is connected to the inner cavity of the diaphragm box 6 to form a closed hydraulic circuit.

[0045] When the content of sediment in the dyeing and printing wastewater changes, the boundary line between the light phase and the heavy phase shifts, causing the diaphragm 7 to shift due to pressure changes. This, in turn, drives the adjustable heavy phase weir 4 to rise and fall through the hydraulic oil in the hydraulic circuit, thereby adjusting the height of the adjustable heavy phase weir 4.

[0046] The reactor 1 is also equipped with a second adjustment mechanism, which is used to adjust the height of the adjustable heavy phase weir plate 4 according to the density of the input dyeing and printing wastewater.

[0047] The second regulating mechanism includes a second metering pump 8 and a pressure control component. A first connecting pipe 9 is fixedly installed on the second metering pump 8, and a second connecting pipe 10 is fixedly installed on the first connecting pipe 9.

[0048] The pressure control component uses the second metering pump 8 to hydraulically control the connection between the first connecting pipe 9 and the second connecting pipe 10 by inputting wastewater into the first connecting pipe 9.

[0049] The second adjustment mechanism also includes a piston 11 that is slidably installed in the first connecting pipe 9, and a second connecting plate 12 is fixedly installed on the piston 11.

[0050] A first connecting plate 13 is slidably installed on the adjustable heavy phase weir plate 4. The piston 11 rises and falls according to the volume of wastewater in the first connecting pipe 9 when the pressure control component is triggered, and performs reverse transmission with the first connecting plate 13 through the transmission component to complete the adjustment of the height of the adjustable heavy phase weir plate 4.

[0051] Wastewater pipe 14 and coagulant conveying pipe 15 are fixedly installed on the lower side of reactor 1, and a first output pipe 16 and a second output pipe 17 are provided on the upper side of reactor 1.

[0052] The reactor 1 has a reaction chamber 18, a light phase collection chamber 19 and a heavy phase collection chamber 20 arranged from bottom to top. The first output pipe 16 is connected to the light phase collection chamber 19 and the second output pipe 17 is connected to the heavy phase collection chamber 20.

[0053] In this embodiment: COD of the dyeing and printing wastewater is removed by coagulation and sedimentation in reactor 1 using a coagulant, thus achieving wastewater recycling. The coagulant is existing technology, and its working principle is not specifically described. The type of coagulant can be determined based on the specific composition of the dyeing and printing wastewater being treated.

[0054] Wastewater pipes 14 and coagulant delivery pipes 15 are installed on both sides of the lower end of the reactor 1. Inside the reactor 1, from bottom to top, are a reaction chamber 18, a light phase collection chamber 19, and a heavy phase collection chamber 20. The reaction chamber 18 is used for the coagulation reaction between wastewater and coagulant. A first output pipe 16 and a second output pipe 17 are correspondingly installed on the upper side of the reactor 1, respectively connected to the light phase collection chamber 19 and the heavy phase collection chamber 20.

[0055] A rotating drum 2 is installed inside the reactor 1. A light phase weir plate 3 and an adjustable heavy phase weir plate 4 are fixed on the drum 2. The adjustable heavy phase weir plate 4 is slidably fitted with the drum 2, and an annular sealing groove 5 is formed between the two, as well as between the adjustable heavy phase weir plate 4 and the light phase weir plate 3. The light phase weir plate 3 is connected to the light phase collection chamber 19, and the adjustable heavy phase weir plate 4 is connected to the heavy phase collection chamber 20.

[0056] The first adjustment mechanism is used for real-time fine adjustment of the height of the adjustable heavy phase weir plate 4. The core of this mechanism is the diaphragm box 6, located on the inner wall of the drum 2. The diaphragm box 6 is situated between the light phase weir plate 3 and the adjustable heavy phase weir plate 4, and contains a diaphragm 7. The position of the diaphragm 7 is designed to correspond to the theoretical boundary between the light and heavy phase liquids during centrifugal separation. Crucially, the chute 5 is pre-filled with hydraulic oil, and the chute 5 is connected to the inner cavity of the diaphragm box 6 via an internal oil passage, thus forming a complete, closed hydraulic circuit.

[0057] Its working principle is as follows: When the drum 2 is driven to rotate at high speed by the drive assembly (specifically, according to Embodiment 3), the two-phase mixture entering it separates under centrifugal force, forming a light phase liquid ring and a heavy phase liquid ring. The pressure applied at their interface directly acts on the diaphragm 7. If the heavy phase liquid increases in volume and density, the interface shifts inward, causing the pressure on the diaphragm 7 to increase. The diaphragm 7 moves outward in the centrifugal direction, squeezing the hydraulic oil in the diaphragm box 6. Since the hydraulic circuit is closed, the increased oil pressure will push the oil in the chute 5, thereby driving the adjustable heavy phase weir 4 to slide in the upward direction. Conversely, if the pressure decreases, the adjustable heavy phase weir 4 will descend under the pressure balance within the system and the weight of the weir 4. This process continues during centrifugal separation, achieving dynamic, adaptive, and fine adjustment of the weir 4 height.

[0058] Example 2, please refer to Figures 1-8 The infusion mechanism also includes a first metering pump 21, which is fixedly connected to the wastewater pipeline 14. A first infusion pipeline 22 is provided on the first metering pump 21 for inputting coagulant.

[0059] The second metering pump 8 is equipped with a second infusion pipeline 23 for inputting wastewater, and the second connecting pipeline 10 is connected to the coagulant delivery pipeline 15.

[0060] The pressure control assembly includes a main valve core 24 fixedly installed in the first connecting pipe 9, an overflow valve core 25 slidably installed on the main valve core 24, and a first spring 26 sleeved on the overflow valve core 25 to provide elastic force to the overflow valve core 25.

[0061] The pressure control assembly also includes a mounting base 27 threaded to the first connecting pipe 9, a spring seat 28 rotatably mounted on the mounting base 27, and an overflow valve core 25 slidably connected to the spring seat 28.

[0062] One end of the first spring 26 is fixedly connected to the overflow valve core 25, and the other end of the first spring 26 is fixedly connected to the spring seat 28.

[0063] In this embodiment: Based on embodiment one, this embodiment details the specific structure of the pressure control component in the infusion mechanism and the second regulating mechanism.

[0064] Because the dissolved impurities in dyeing and printing wastewater are uncertain, the density of the mixed liquor is also uncertain, which in turn affects the liquid levels of the two phases after centrifugation. Therefore, before separation begins, a reference height for the weir plate needs to be preset by a second regulating mechanism based on the wastewater conditions.

[0065] The infusion mechanism includes a first metering pump 21 and a second metering pump 8. The first metering pump 21 is fixedly connected to the wastewater pipeline 14, and a first infusion pipeline 22 is provided on it for introducing coagulant. A second infusion pipeline 23 is provided on the second metering pump 8 for introducing wastewater.

[0066] The second regulating mechanism includes the second metering pump 8 and a pressure control assembly. A first connecting pipe 9 is fixedly installed on the second metering pump 8, and a second connecting pipe 10 is fixedly installed on the first connecting pipe 9. The second connecting pipe 10 is connected to the coagulant delivery pipe 15.

[0067] The pressure control component uses a second metering pump 8 to hydraulically control the connection between the first connecting pipe 9 and the second connecting pipe 10 by inputting wastewater into the first connecting pipe 9. Specifically, the pressure control component includes a main valve core 24 fixedly installed in the first connecting pipe 9, an overflow valve core 25 slidably installed on the main valve core 24, and a first spring 26 sleeved on the overflow valve core 25 to provide elastic force.

[0068] Furthermore, the pressure control assembly also includes a mounting base 27 threadedly connected to the first connecting pipe 9, a spring seat 28 rotatably mounted on the mounting base 27, and an overflow valve core 25 slidably connected to the spring seat 28. One end of the first spring 26 is fixedly connected to the overflow valve core 25, and the other end is fixedly connected to the spring seat 28.

[0069] The coarse adjustment principle is as follows: the second metering pump 8 pumps wastewater into the first connecting pipe 9 at a fixed flow rate, causing the hydraulic pressure inside the pipe to rise. When the hydraulic pressure overcomes the preload of the first spring 26, it pushes the overflow valve core 25 to move, connecting the first connecting pipe 9 to the second connecting pipe 10. At this time, the liquid level in the first connecting pipe 9, i.e., the position of the piston 11, depends on the volume of wastewater required to reach the trigger pressure, and this volume is directly related to the wastewater density. If the wastewater density is high, the volume required to reach the same pressure is small, and the piston 11 is positioned lower; if the wastewater density is low, the volume required is large, and the piston 11 is positioned higher. The lifting and lowering of the piston 11 is converted into the reverse movement of the first connecting plate 13 through a subsequent transmission assembly, thereby completing the initial setting of the height of the adjustable heavy phase weir plate 4.

[0070] The trigger pressure of the pressure control component can be adjusted by turning the mounting base 27 to adjust the preload of the first spring 26, thereby adapting to different working conditions.

[0071] Example 3, please refer to Figures 1-9 The transmission assembly includes a rotating rod 29 rotatably mounted on the reactor 1, a first transmission plate 30 fixedly mounted on the rotating rod 29, and two second transmission plates 31 symmetrically slidably mounted on the first transmission plate 30. The two second transmission plates 31 are respectively hinged to the first connecting plate 13 and the second connecting plate 12 via hinge shafts.

[0072] A ratchet 32 ​​is fixedly installed on the rotating rod 29. An installation plate 34 is fixedly installed on the overflow valve core 25 through the third connecting plate 33. A pawl 35 is fixedly installed on the installation plate 34, and the pawl 35 engages with the ratchet 32.

[0073] A motor 36 is fixedly installed on the reactor 1, and a rotating shaft 37 is fixedly connected to the output shaft of the motor 36. A fixing plate 38 is fixedly installed on the drum 2, and the rotating shaft 37 is fixedly connected to the fixing plate 38.

[0074] In this embodiment: This embodiment is a further supplement to Embodiments 1 and 2, and details the specific structure of the transmission, locking and the drive part of the second adjustment mechanism and the drum 2.

[0075] The second adjustment mechanism also includes a piston 11 slidably installed in the first connecting pipe 9, and a second connecting plate 12 fixedly installed on the piston 11. A first connecting plate 13 is slidably installed on the adjustable phase weir plate 4.

[0076] The piston 11 moves up or down according to the volume of wastewater in the first connecting pipe 9 when the pressure control component is triggered, and then reverses the transmission with the first connecting plate 13 through the transmission component to complete the initial adjustment of the height of the adjustable heavy phase weir plate 4.

[0077] The transmission assembly includes a rotating rod 29 rotatably mounted on the reactor 1, a first transmission plate 30 fixedly mounted on the rotating rod 29, and two second transmission plates 31 symmetrically slidably mounted on the first transmission plate 30. The two second transmission plates 31 are respectively hinged to the first connecting plate 13 and the second connecting plate 12 via hinge shafts.

[0078] To lock the position of the adjustable heavy phase weir plate 4 after initial adjustment, a ratchet 32 ​​is also fixedly installed on the rotating rod 29. The overflow valve core 25 is fixedly mounted on a mounting plate 34 via a third connecting plate 33. A pawl 35 is fixedly mounted on the mounting plate 34, and the pawl 35 engages with the ratchet 32. When the overflow valve core 25 is pushed by pressure and moves, this linkage structure causes the pawl 35 to engage with the ratchet 32, preventing the rotating rod 29 from rotating back, thereby fixing the adjusted position.

[0079] A motor 36 is fixedly installed on the reactor 1, and a rotating shaft 37 is fixedly connected to the output shaft of the motor 36. A fixing plate 38 is fixedly installed on the drum 2, and the rotating shaft 37 is fixedly connected to the fixing plate 38. When the motor 36 runs, it drives the drum 2 to rotate at high speed, providing power for centrifugal separation.

[0080] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0081] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0082] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A device for recycling dyeing and printing wastewater, comprising a reaction vessel (1), characterized in that: The reactor (1) is equipped with a liquid delivery mechanism, which is used to inject dyeing wastewater and coagulant into the reactor (1); The reactor (1) is equipped with a rotating drum (2). After the dyeing and printing wastewater and coagulant undergo a precipitation reaction in the reactor (1), the mixture is centrifuged and separated by the rotating drum (2) to achieve the recycling of the dyeing and printing wastewater. A light phase weir plate (3) is fixedly installed inside the drum (2), and an adjustable heavy phase weir plate (4) is slidably installed on the light phase weir plate (3), and an annular groove (5) is provided between the adjustable heavy phase weir plate (4) and the light phase weir plate (3). The inner wall of the drum (2) is fixedly installed with a diaphragm box (6), and a diaphragm (7) is slidably installed inside the diaphragm box (6). The position of the diaphragm (7) corresponds to the liquid surface boundary line between the light phase and the heavy phase during centrifugal separation of the mixture. The chute (5) is filled with hydraulic oil, and the chute (5) is connected to the inner cavity of the diaphragm box (6) to form a closed hydraulic circuit. When the content of sediment in the dyeing and printing wastewater changes, the boundary line between the light phase and the heavy phase is displaced, causing the membrane (7) to be displaced by the pressure change. In turn, the adjustable heavy phase weir plate (4) is driven to rise and fall by the hydraulic oil in the hydraulic circuit, so as to adjust the height of the adjustable heavy phase weir plate (4).

2. The dyeing and printing wastewater recycling device according to claim 1, characterized in that: The reactor (1) is also provided with a second adjustment mechanism, which is used to adjust the height of the adjustable heavy phase weir plate (4) according to the density of the input dyeing and printing wastewater. The second regulating mechanism includes a second metering pump (8) and a pressure control assembly. A first connecting pipe (9) is fixedly installed on the second metering pump (8), and a second connecting pipe (10) is fixedly installed on the first connecting pipe (9). The pressure control component uses the second metering pump (8) to hydraulically control the connection between the first connecting pipe (9) and the second connecting pipe (10) by inputting wastewater into the first connecting pipe (9).

3. The dyeing and printing wastewater recycling device according to claim 2, characterized in that: The second adjustment mechanism further includes a piston (11) that is slidably installed in the first connecting pipe (9), and a second connecting plate (12) is fixedly installed on the piston (11). The adjustable heavy phase weir plate (4) is slidably mounted with a first connecting plate (13). The piston (11) rises and falls according to the volume of wastewater in the first connecting pipe (9) when the pressure control component is triggered, and performs reverse transmission with the first connecting plate (13) through the transmission component to complete the adjustment of the height of the adjustable heavy phase weir plate (4).

4. The dyeing and printing wastewater recycling device according to claim 3, characterized in that: Wastewater pipe (14) and coagulant conveying pipe (15) are fixedly installed on the lower side of the reactor (1), and a first output pipe (16) and a second output pipe (17) are provided on the upper side of the reactor (1). The reactor (1) is provided with a reaction chamber (18), a light phase collection chamber (19) and a heavy phase collection chamber (20) from bottom to top. The first output pipe (16) is connected to the light phase collection chamber (19) and the second output pipe (17) is connected to the heavy phase collection chamber (20).

5. The dyeing and printing wastewater recycling device according to claim 4, characterized in that: The infusion mechanism also includes a first metering pump (21), which is fixedly connected to the wastewater pipeline (14). The first metering pump (21) is provided with a first infusion pipeline (22) for inputting coagulant. The second metering pump (8) is equipped with a second liquid delivery pipe (23) for inputting wastewater, and the second connecting pipe (10) is connected to the coagulant delivery pipe (15).

6. The dyeing and printing wastewater recycling device according to claim 3, characterized in that: The pressure control assembly includes a main valve core (24) fixedly installed in the first connecting pipe (9), an overflow valve core (25) slidably installed on the main valve core (24), and a first spring (26) sleeved on the overflow valve core (25) to provide elastic force to the overflow valve core (25).

7. The dyeing and printing wastewater recycling device according to claim 6, characterized in that: The pressure control assembly further includes a mounting base (27) threadedly connected to the first connecting pipe (9), a spring seat (28) rotatably mounted on the mounting base (27), and the overflow valve core (25) slidably connected to the spring seat (28); One end of the first spring (26) is fixedly connected to the overflow valve core (25), and the other end of the first spring (26) is fixedly connected to the spring seat (28).

8. The dyeing and printing wastewater recycling device according to claim 6, characterized in that: The transmission assembly includes a rotating rod (29) rotatably mounted on the reactor (1), a first transmission plate (30) fixedly mounted on the rotating rod (29), and two second transmission plates (31) symmetrically slidably mounted on the first transmission plate (30). The two second transmission plates (31) are respectively hinged to the first connecting plate (13) and the second connecting plate (12) via hinge shafts.

9. A wastewater recycling device for dyeing and printing as described in claim 8, characterized in that: A ratchet (32) is fixedly installed on the rotating rod (29), and an installation plate (34) is fixedly installed on the overflow valve core (25) through the third connecting plate (33). A pawl (35) is fixedly installed on the installation plate (34), and the pawl (35) engages with the ratchet (32).

10. A device for recycling dyeing and printing wastewater according to claim 1, characterized in that: A motor (36) is fixedly installed on the reactor (1), and a rotating shaft (37) is fixedly connected to the output shaft of the motor (36). A fixing plate (38) is fixedly installed on the drum (2), and the rotating shaft (37) is fixedly connected to the fixing plate (38).

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