Polyester wastewater flocculation and precipitation treatment device

Abstract

The present application relates to wastewater treatment technical field, disclose a kind of polyester wastewater flocculation and precipitation treatment device, including cylinder, transmission shaft, rotating frame, fixed wheel, follower, inclined pipe, spray ring, upper pipe, inner flow plate and variable pitch disc.Transmission shaft drives rotating frame revolution, when follower and fixed wheel engage, follower shaft rotates, inclined pipe is sent to spray ring by reversing pipe and variable pitch disc and is sprayed to upper layer wastewater, upper pipe forms uprush water flow by horn mouth and spray hole, cooperate bottom shovel and side wall shovel to reduce the adhesion of sediment, to improve vertical mixing effect before flocculation and precipitation.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, specifically to a polyester wastewater flocculation and sedimentation treatment device for rotating mixing, vertical feeding, and sediment scraping during the flocculation and sedimentation process of polyester wastewater. Background Technology

[0002] Polyester production, cleaning, and recycling processes generate wastewater containing organic matter, suspended solids, and fine particles. Before entering subsequent treatment units, flocculant or other treatment solutions are usually added to the wastewater to cause the fine particles to form larger flocs and settle and separate.

[0003] The flocculation and sedimentation process has high requirements for the mixing state. After the treatment liquid is added, it needs to come into full contact with the wastewater at different heights in the cylinder in a short time. If only a local area with a high concentration of the solution is formed, it will lead to insufficient flocculation of some wastewater and uneven formation of sediment particles.

[0004] Existing treatment equipment often uses a central stirring shaft to drive the stirring blades to rotate, which can promote the circulation of wastewater in the horizontal circumferential direction. However, it has limited effect on the upward conveying of wastewater at the bottom and middle and lower layers of the cylinder. Especially when the polyester wastewater contains a lot of suspended particles, the exchange between the bottom wastewater and the upper wastewater is not sufficient.

[0005] Although some agitators can increase the number of agitator blades or increase the rotation speed, simply increasing the rotation speed can easily destroy the already formed flocs, increase energy consumption and equipment vibration, and still make it difficult to form a stable vertical flow that continuously transports materials from the bottom of the cylinder to the upper layer.

[0006] In the early stage of flocculation and sedimentation, if the wastewater at the bottom cannot be carried to the upper layer and mixed with the treatment liquid in time, the bottom area may be in a state of insufficient treatment liquid or high concentration of suspended solids, which will affect the thickness of the subsequent sedimentation layer and the sedimentation rate.

[0007] On the other hand, the flocculated sediments that gradually form during wastewater treatment tend to adhere to the bottom and side walls of the cylinder. If the stirring structure is only responsible for rotating and mixing without scraping the bottom and side walls, the accumulation of sediments will further weaken the effective flow space inside the cylinder.

[0008] While existing sedimentation equipment with scrapers can reduce wall adhesion, scrapers typically only address sedimentation and accumulation issues and cannot continuously carry lower-layer wastewater into the upper mixing zone, nor can they simultaneously generate multiple localized upward flushing flows during rotation.

[0009] For polyester wastewater, suspended particles, oily organic matter and fine flocs in the wastewater are prone to concentration differences at different heights. If the mixing device cannot continuously return the lower layer of wastewater to the upper layer of the treatment liquid distribution area, even if the amount of treatment liquid added is sufficient, it will be difficult to make full use of it.

[0010] If an external circulation pump is used to pump the wastewater from the bottom to the top, the pipeline and pump body are easily blocked by flocs, particles or sediments, and the equipment structure will become more complicated. Therefore, it is more suitable to use the stirring mechanism inside the cylinder to form vertical conveying.

[0011] Meanwhile, the internal space of the flocculation sedimentation equipment is limited. If a lifting and stirring mechanism or multiple independent stirring shafts are set up separately, it will increase the difficulty of sealing, transmission and maintenance. The equipment is also more likely to have more wear points when treating wastewater containing particles for a long time.

[0012] Therefore, an ideal structure should form a compound motion based on the original central drive, so that the same power source can drive the overall stirring and also form relative rotation and upward flow in local areas, so as to reduce the complexity brought about by additional drive components.

[0013] Therefore, there is a need for a device suitable for flocculation and sedimentation treatment of polyester wastewater that can generate internal components to rotate by the same transmission process while maintaining conventional rotary mixing, thereby conveying the bottom and lower middle layers of wastewater upwards and strengthening vertical mixing through upward jets. Summary of the Invention

[0014] The purpose of this invention is to provide a polyester wastewater flocculation and sedimentation treatment device to solve the problem that existing wastewater flocculation and sedimentation equipment mainly relies on horizontal rotation and stirring, which makes it difficult to effectively mix in the vertical direction and affects the sedimentation effect.

[0015] To achieve the above objectives, the device of the present invention includes a cylinder, a reducer is fixedly installed at the upper end of the cylinder, a motor is mounted on the reducer, the extended end of the reducer is connected to a drive shaft, the drive shaft is inserted into the cylinder and connected to a rotating frame at the lower end, and the motor drives the drive shaft and the rotating frame to rotate around the axis of the cylinder via the reducer.

[0016] A fixed wheel is fixedly installed at the upper end of the cylinder. The fixed wheel is sleeved on the outside of the drive shaft and kept fixed to the cylinder. Two rotating sleeves are installed on the rotating frame. Each rotating sleeve is rotatably connected to a follower shaft. A follower wheel is installed at the upper end of the follower shaft. The follower wheel meshes with the fixed wheel.

[0017] Since the fixed wheel is in a fixed state, when the drive shaft drives the rotating frame to rotate, the follower wheel revolves around the fixed wheel with the rotating sleeve. At the same time, the follower wheel rotates on its own axis under the meshing action with the fixed wheel. The follower wheel further drives the follower shaft to rotate on its own axis, so that the follower shaft has both a revolution path and rotation power.

[0018] The rotating frame is equipped with a bottom shovel and a side wall shovel. The bottom shovel is set close to the bottom of the cylinder, and the side wall shovel is set close to the side wall of the cylinder. When the rotating frame rotates, the bottom shovel and the side wall shovel scrape the sediment on the bottom and side wall of the cylinder, respectively, to reduce the adhesion and accumulation of flocculent sediment.

[0019] Two inclined delivery pipes are fixedly installed at the lower end of the follower shaft. The upper ends of the two inclined delivery pipes are respectively fixedly connected to the spray ring. Multiple annular holes are opened on the outer wall of the spray ring. Wastewater flowing upward in the inclined delivery pipes can enter the spray ring and be sprayed outward through the multiple annular holes.

[0020] Multiple reversing pipes are connected and installed on the outer wall of the inclined conveying pipe. A pitch control plate is installed at the other end of the multiple reversing pipes. The upper end of the pitch control plate is small and the lower end is large. When the follower shaft drives the inclined conveying pipe to rotate, the lower end of the pitch control plate can be disturbed at a larger diameter position and more lower wastewater can be introduced.

[0021] Multiple reversing pipes guide the wastewater near the pitch control plate into the inclined conveying pipe. The inclined conveying pipe extends obliquely from bottom to top away from the follower shaft. Therefore, when the follower shaft rotates, the end of the inclined conveying pipe that is farther away from the follower shaft generates a stronger upward conveying tendency. Combined with the change in the diameter of the pitch control plate, this forms a vertical conveying that is stronger at the bottom and weaker at the top.

[0022] Bottom plates are installed at the lower ends of the two inclined feeding pipes, and bottom sleeves are installed in the middle of the bottom plates. Outer wall rods are installed at the ends of the rotating frame. The lower ends of the outer wall rods are connected to the upper feeding pipes via connecting plates. The bottom sleeves are rotatably connected inside the upper feeding pipes, so that the upper feeding pipes will not rotate synchronously when the follower shaft and the inclined feeding pipes rotate.

[0023] Multiple horn-shaped nozzles are connected and installed on the side wall of the upper feed pipe. Spray holes are opened at the upper end of the upper feed pipe. The horn-shaped nozzles are connected to the spray holes through the upper feed pipe. When the rotating frame drives the upper feed pipe to revolve, the horn-shaped nozzles can collect the surrounding wastewater and spray it upward from the spray holes through the upper feed pipe.

[0024] An inner flow plate is installed on the outer wall rod. When the inner flow plate rotates with the outer wall rod, it guides the wastewater on both sides towards the cylinder axis and the vicinity of the upper delivery pipe, so that a relatively concentrated water inlet area is formed around the upper delivery pipe, thereby increasing the amount of water entering the upper delivery pipe through the bell mouth.

[0025] After the flocculant is added into the cylinder, the revolution of the rotating frame provides overall circumferential stirring. The rotation of the follower shaft drives the inclined conveyor pipe, the reversing pipe and the pitch disc to work. The wastewater from the bottom and middle-lower layers enters the inclined conveyor pipe through the reversing pipe and is then transported upwards, and then sprayed out from the annular hole of the spray ring.

[0026] The upward feeding pipe and the inclined feeding pipe form another set of vertical flow paths. The upward feeding pipe revolves with the rotating frame and collects wastewater through the funnel mouth. The wastewater is sprayed upward from the smaller diameter nozzle to form an upward jet, which supplements the vertical exchange of the treatment liquid and wastewater in the cylinder.

[0027] Because the lower diameter of the pitch disc is larger, a greater amount of wastewater near the bottom of the cylinder is driven into the reversing pipe. The higher the position, the smaller the diameter of the pitch disc, and the amount of wastewater entering the reversing pipe gradually decreases, which can create a vertical upward feeding difference that better meets the mixing needs of the bottom of the sedimentation tank.

[0028] After the inclined conveying pipe is arranged to be tilted outward, the linear velocity of the end far from the follower shaft is greater during the rotation process, and the upward conveying force is stronger. The upward conveying force is relatively smaller at the position close to the follower shaft. This structure, combined with the shape of the variable pitch disc which is smaller at the top and larger at the bottom, allows the lower wastewater to be preferentially sent to the upper mixing zone.

[0029] The two follower shafts are mounted on the rotating frame through their respective rotating sleeves. The rotational power of the follower shafts comes from the meshing of the follower wheel and the fixed wheel. Therefore, as long as the rotating frame revolves, the two follower shafts can form synchronous upward disturbances at different positions in the cylinder, avoiding vertical mixing that is concentrated on only one side of the cylinder.

[0030] The rotating connection between the bottom sleeve and the upper feed pipe provides support to the lower end of the inclined feed pipe, while not forcing the upper feed pipe to rotate at high speed with the inclined feed pipe. Therefore, the upward rotation path of the inclined feed pipe and the orbital jet path of the upper feed pipe can coordinate in the same vicinity without interfering with each other.

[0031] The spray ring disperses the wastewater delivered by the inclined pipe through multiple annular holes, which can reduce the direct impact of a single large flow stream on the already formed flocs; the spray holes retain a more concentrated upward spray state, which is used to form a local upward flow near the upper delivery pipe. The two outflow methods work together to improve the wastewater exchange in the height direction of the cylinder.

[0032] The transmission relationship formed by the fixed wheel, the follower wheel, and the rotating sleeve allows the follower shaft to rotate without an additional motor. After the inclined delivery pipe, the reversing pipe, and the pitch changer are installed at the lower end of the follower shaft, the rotational motion can be used directly to generate water intake, reversal, and upward delivery inside the cylinder.

[0033] The flocculent wastewater scraped up by the bottom and sidewall shovels will not remain near the bottom or sidewalls, but will be pushed by the inner flow plate to the vicinity of the feed pipe and re-inhaled into the feed path by the reversing pipe near the inclined feed pipe, thus forming a continuous connection between the scraping structure and the vertical mixing structure.

[0034] When the treatment liquid is first added, the nozzles of the upper delivery pipe can form a localized, rapid upward flow, which promotes the diffusion of the treatment liquid to the lower layer. As the flocs gradually increase in size, the annular holes of the spray ring can disperse the outflow and reduce the localized strong impact, thus balancing mixing efficiency and floc stability.

[0035] The transmission hierarchy of each component is clear. The motor and reducer are only responsible for inputting torque, the transmission shaft is responsible for driving the rotating frame, the fixed wheel and follower wheel are responsible for converting the revolution into the rotation of the follower shaft, and the follower shaft then drives the inclined delivery pipe and the variable pitch disc to complete the water intake and delivery from the lower layer to the upper layer, which is convenient for manufacturing and maintenance.

[0036] The outer wall rod and connecting plate hold the upper feed pipe near the end of the rotating frame, so that the upper feed pipe can fit into the bottom sleeve at the lower end of the inclined feed pipe; this fit ensures that the lower end of the inclined feed pipe is supported, while allowing the upper feed pipe to maintain a relatively independent orbital jet function.

[0037] After the inner flow plate is installed on the outer wall rod, it can rotate with the rotating frame without a separate drive component. The inner flow plate guides the wastewater on the outside of the cylinder inward, making it easier for the wastewater disturbed by the bottom shovel and side wall shovel to enter the vertical conveying area corresponding to the inclined conveying pipe and the upper conveying pipe.

[0038] The structure of this invention allows for adjustment of the length of the rotating frame, the tilt angle of the inclined feeding pipe, and the number of bell mouths according to the diameter of the cylinder, thus adapting to polyester wastewater flocculation and sedimentation treatment equipment of different scales without changing the basic transmission relationship between the fixed wheel and the follower wheel.

[0039] During the slow stirring state in the later stage of sedimentation treatment or before sludge discharge, the bottom shovel and side wall shovel can still run at a low speed with the rotating frame, and the inclined conveying pipe and the upper conveying pipe maintain moderate upward flow, which can reduce the possibility of excessive local accumulation at the bottom affecting subsequent discharge or cleaning.

[0040] The bottom shovel, side wall shovel, inner flow plate, inclined delivery pipe, and upper delivery pipe are all indirectly driven by the same drive shaft. Without the need for multiple vertical circulation pumps or lifting and stirring mechanisms, a composite flow of circumferential stirring, wall scraping, lower layer upward delivery, and jet mixing can be formed in the cylinder.

[0041] Compared to devices that only have rotating stirring blades, this invention uses the meshing of a fixed wheel and a follower wheel to make the follower shaft rotate synchronously while revolving. The rotating inclined delivery pipe, reversing pipe, and pitch disc bring the lower wastewater into the upper layer, significantly enhancing vertical mixing.

[0042] Compared to sedimentation equipment that only has scrapers, the bottom shovel and side wall shovel of the present invention not only reduce sediment adhesion, but also work together with the upward feeding of the inclined pipe and the jet flow of the upward feeding pipe to enable the scraped or disturbed wastewater to re-participate in the mixing of the flocculation treatment liquid.

[0043] Compared to vertical mixing methods that require additional circulating pumps, this invention utilizes the combined motion of a drive shaft to drive a rotating frame and a follower shaft to achieve internal upward feeding. The structure is concentrated inside the cylinder, the transmission path is clear, and it is suitable for arrangement in polyester wastewater flocculation and sedimentation treatment equipment. Attached Figure Description

[0044] Figure 1 This is a schematic diagram of the overall external structure of the present invention; Figure 2 This is a schematic diagram of the structure of the transmission shaft, fixed wheel, follower wheel, rotating frame, spraying ring, bell mouth and bottom shovel after the cylinder body of the present invention is cut open; Figure 3 This is a schematic diagram of the structure of the rotating frame, follower shaft, follower wheel, side wall shovel, rotating sleeve, inner flow plate, outer wall rod, annular hole, spraying ring and bottom shovel of the present invention; Figure 4This is a schematic diagram of the structure of the follower shaft, follower wheel, spray ring, inclined delivery pipe, annular hole, reversing pipe, bottom plate, bottom sleeve and pitch control plate of the present invention. Figure 5 This is a partial structural schematic diagram of the inclined delivery pipe, spray ring, annular hole, reversing pipe, bottom plate, bottom sleeve and pitch disc of the present invention; Figure 6 This is a schematic diagram of the structure of the rotating frame, rotating sleeve, inner flow plate, spray hole, outer wall rod, flared mouth and upper delivery pipe of the present invention; Figure 7 This is a schematic diagram of the structure of the rotating frame, side wall shovel, rotating sleeve, spray hole, connecting plate, upper feeding pipe, bottom shovel and flared mouth of the present invention; Figure 8 This is a bottom view structural diagram of the motor, reducer, cylinder and fixed wheel of the present invention.

[0045] Reference numerals: 1. Cylinder; 2. Reducer; 3. Motor; 4. Drive shaft; 5. Rotating frame; 6. Fixed wheel; 7. Rotating sleeve; 8. Follower shaft; 9. Follower wheel; 10. Bottom shovel; 11. Side wall shovel; 12. Inclined delivery pipe; 13. Spray ring; 14. Annular hole; 15. Bottom plate; 16. Bottom sleeve; 17. Outer wall rod; 18. Connecting plate; 19. Top delivery pipe; 20. Trumpet mouth; 21. Spray hole; 22. Inner flow plate; 23. Reversing pipe; 24. Pitch changer. Detailed Implementation

[0046] like Figures 1 to 8 As shown, this embodiment provides a polyester wastewater flocculation and sedimentation treatment device. The cylinder 1 serves as a container for mixing and sedimentation of polyester wastewater and flocculation treatment liquid. A reducer 2 is fixedly installed at the upper end of the cylinder 1, and a motor 3 is installed on the reducer 2. The extended end of the reducer 2 is connected to a drive shaft 4, which is inserted into the cylinder 1 and connected to a rotating frame 5 at the lower end.

[0047] The fixed wheel 6 is located at the upper end of the cylinder 1 and outside the drive shaft 4. The fixed wheel 6 is fixedly connected to the cylinder 1 and does not rotate with the drive shaft 4. The drive shaft 4 can pass through the fixed wheel 6 and transmit the torque output by the motor 3 and the reducer 2 to the rotating frame 5 inside the cylinder 1.

[0048] Two rotating sleeves 7 are installed on the rotating frame 5. Each rotating sleeve 7 is rotatably connected to a follower shaft 8. Follower wheels 9 are installed on the upper end of the follower shaft 8. Both follower wheels 9 are engaged with the fixed wheel 6. When the rotating frame 5 rotates around the transmission shaft 4, it drives the two follower wheels 9 to revolve around the fixed wheel 6.

[0049] Since the fixed wheel 6 remains fixed on the cylinder 1, the follower wheel 9 will rotate due to the meshing action of the tooth surface of the fixed wheel 6 when it revolves with the rotating frame 5. The follower wheel 9 drives the follower shaft 8 to rotate within the corresponding rotating sleeve 7, so that the follower shaft 8 has both a revolution motion around the transmission shaft 4 and a rotation motion in the direction of its own axis.

[0050] The bottom shovel 10 and the side wall shovel 11 are installed at the end of the rotating frame 5. The bottom shovel 10 is close to the bottom of the cylinder 1, and the side wall shovel 11 is close to the side wall of the cylinder 1. When the rotating frame 5 rotates, the bottom shovel 10 scrapes the sediment at the bottom of the cylinder 1, and the side wall shovel 11 scrapes the attached material on the side wall of the cylinder 1.

[0051] Two inclined delivery pipes 12 are fixedly installed at the lower end of each follower shaft 8. The upper ends of the two inclined delivery pipes 12 are respectively fixedly connected to the spray ring 13. The spray ring 13 is arranged around the lower area of ​​the follower shaft 8. Multiple annular holes 14 are opened on the outer wall of the spray ring 13, and the wastewater entering the spray ring 13 can be sprayed out from the annular holes 14.

[0052] Bottom plates 15 are installed at the lower ends of the two inclined feeding tubes 12, and bottom sleeves 16 are installed in the middle of the bottom plates 15. The bottom plates 15 are used to maintain the relative position between the lower ends of the two inclined feeding tubes 12, and the bottom sleeves 16 provide lower support for the lower ends of the inclined feeding tubes 12 to rotate with the follower shaft 8.

[0053] An outer wall rod 17 is installed at the end of the rotating frame 5. A connecting plate 18 is installed at the lower end of the outer wall rod 17. An upper feeding pipe 19 is installed at the other end of the connecting plate 18. The bottom sleeve 16 is rotatably connected inside the upper feeding pipe 19, so that the inclined feeding pipe 12 can rotate relative to the upper feeding pipe 19 and the upper feeding pipe 19 revolves with the rotating frame 5.

[0054] Multiple horn-shaped nozzles 20 are connected and installed on the side wall of the upper feed pipe 19. A spray hole 21 is opened at the upper end of the upper feed pipe 19. The horn-shaped nozzles 20 are connected to the spray hole 21 through the upper feed pipe 19. The flared end of the horn-shaped nozzles 20 facilitates the collection of surrounding wastewater when the upper feed pipe 19 revolves. The diameter of the spray hole 21 is small to increase the upward spray velocity.

[0055] An inner flow plate 22 is installed on the outer wall rod 17. The inner flow plate 22 is located outside the upper delivery pipe 19 and extends towards the axis of the cylinder 1. When the outer wall rod 17 rotates with the rotating frame 5, the inner flow plate 22 pushes the surrounding wastewater to gather near the axis of the cylinder 1 and the upper delivery pipe 19, providing more stable water intake conditions for the bell mouth 20.

[0056] Multiple reversing pipes 23 are connected and installed on the outer wall of the inclined feeding pipe 12. The multiple reversing pipes 23 are arranged at intervals along the length of the inclined feeding pipe 12. The other end of the multiple reversing pipes 23 is connected to the pitch plate 24. The upper diameter of the pitch plate 24 is smaller than the lower diameter and rotates around the follower shaft 8 together with the inclined feeding pipe 12.

[0057] In this embodiment, the polyester wastewater to be treated and the corresponding flocculant are first added into the cylinder 1. Then, the motor 3 is started. The motor 3 drives the transmission shaft 4 to rotate via the reducer 2. The transmission shaft 4 drives the rotating frame 5, the outer wall rod 17, the upper feeding pipe 19 and the follower shaft 8 to revolve around the axis of the cylinder 1.

[0058] When the rotating frame 5 revolves, the bottom shovel 10 sweeps along the bottom of the cylinder 1 and disturbs the bottom sediment layer, while the side wall shovel 11 sweeps along the side wall of the cylinder 1 and reduces the adhesion of flocculated sediment. The wastewater scraped up near the bottom and side wall can re-enter the mixing flow field inside the cylinder 1.

[0059] While the rotating frame 5 revolves, the follower wheel 9 meshes with the fixed wheel 6 and drives the follower shaft 8 to rotate. The two inclined conveying pipes 12 at the lower end of the follower shaft 8 rotate accordingly. The reversing pipe 23 and the variable pitch disk 24 on the inclined conveying pipe 12 also rotate synchronously and cause disturbance and guide to the surrounding wastewater.

[0060] The lower diameter of the variable pitch disc 24 is relatively large. When it is close to the bottom of the cylinder 1, it can drive more lower wastewater to flow towards the inlet area of ​​the reversing pipe 23. After the lower wastewater changes its flow direction through the reversing pipe 23, it enters the inclined delivery pipe 12 and then flows upward along the inclined delivery pipe 12 into the spray ring 13.

[0061] After entering the spray ring 13, the wastewater is sprayed outward from multiple annular holes 14. The annular holes 14 are arranged around the spray ring 13, so that the wastewater from the lower layer can enter the middle and upper mixing zone in different directions, thereby increasing the contact opportunities between the treated liquid and the wastewater in the lower layer.

[0062] The inclined pipe 12 extends obliquely from bottom to top in a direction away from the follower shaft 8. When the inclined pipe 12 rotates, the part farther away from the follower shaft 8 has a greater linear velocity. Combined with the larger diameter of the lower end of the pitch disc 24, the wastewater near the bottom of the cylinder 1 is given a stronger upward conveying effect.

[0063] Because the variable pitch disc 24 is smaller at the top and larger at the bottom, the ability to carry wastewater varies at different heights. The bottom can carry more wastewater, while the top can carry relatively less. This difference causes the wastewater at the bottom and lower middle layers of the cylinder 1 to be preferentially sent to the upper layer, resulting in more obvious vertical mixing.

[0064] The upper feed pipe 19 revolves with the rotating frame 5 but does not rotate with the inclined feed pipe 12. Multiple horn-shaped nozzles 20 collect surrounding wastewater from different directions during the revolution. After entering the upper feed pipe 19, the wastewater is sprayed upward from the upper nozzle 21. The upward jet formed by the nozzle 21 supplements the upward flow of the inclined feed pipe 12.

[0065] When the inner flow plate 22 rotates with the outer wall rod 17, it exerts an inward squeezing and guiding effect on the wastewater on the outside, which increases the amount of wastewater near the upper delivery pipe 19. The wastewater collected by the bell mouth 20 is sprayed upward through the spray hole 21 and forms a local rapid upward flow in the cylinder 1.

[0066] The combined effect of the multi-point upward flow generated by the inclined conveyor pipe 12 and the upward jet flow generated by the upward conveyor pipe 19 causes the polyester wastewater to not only rotate around the axis of the cylinder 1, but also form a circulation state of bottom upward, middle diffusion and upper remixing in the height direction of the cylinder 1.

[0067] In the initial stage after the flocculant is added, the vertical circulation can carry the treatment liquid into the wastewater at different heights of the cylinder 1, reducing the situation where the treatment liquid is concentrated only in the upper layer or local area, and helping fine suspended matter to form flocs in a more uniform solution environment.

[0068] After the flocs gradually form, the bottom shovel 10 and the side wall shovel 11 reduce the retention of sediment on the bottom and side wall of the cylinder 1 by scraping. The inclined delivery pipe 12 and the upward delivery pipe 19 prevent local dead zones from lacking mixing for a long time by sending water upward.

[0069] When it is necessary to reduce the damage to the already formed flocs, the speed of the drive shaft 4 can be controlled by the reducer 2 to keep the rotating frame 5 at a low revolution speed. At the same time, the follower shaft 8 continues to rotate by means of the meshing of the fixed wheel 6 and the follower wheel 9, thereby maintaining the necessary vertical exchange under a gentler circumferential stirring.

[0070] In this embodiment, the annular holes 14 on the spray ring 13 can be evenly distributed circumferentially, the horn mouth 20 can be spaced apart axially along the upper delivery pipe 19, and the reversing pipe 23 can be distributed along the length of the inclined delivery pipe 12 so as to form water inlet, upper delivery and spraying paths at different heights respectively.

[0071] In this embodiment, the bottom shovel 10 and the side wall shovel 11 can be made of corrosion-resistant materials, and the inclined delivery pipe 12, the spray ring 13, the upper delivery pipe 19 and the reversing pipe 23 can be made of metal or engineering plastic materials suitable for polyester wastewater environment. The specific materials can be selected according to the acidity and alkalinity of the wastewater and the treatment temperature.

[0072] Two follower shafts 8 are distributed at different positions in the rotating frame 5. The inclined conveying pipe 12 and the variable pitch disk 24 at the lower end of the follower shaft 8 are also distributed in different mixing areas. Every time the rotating frame 5 rotates once, the two inclined conveying pipes 12 can pass through different positions in the cylinder 1 and bring the lower wastewater from different positions into the upper layer.

[0073] The rotational engagement between the bottom sleeve 16 and the upper feeding pipe 19 ensures that the bottom plate 15 and the lower end of the inclined feeding pipe 12 are not suspended. When the follower shaft 8 rotates, the lower end of the inclined feeding pipe 12 can maintain a relatively stable rotational trajectory, while the upper feeding pipe 19 is maintained in its revolution position by the connecting plate 18 and the outer wall rod 17.

[0074] The annular hole 14 of the spray ring 13 is used to form a dispersed spray, and the spray hole 21 is used to form a concentrated upward jet. The dispersed spray is suitable for spreading the wastewater from the lower layer to a larger area, and the concentrated upward jet is suitable for establishing a local vertical flow velocity near the upper delivery pipe 19. When the two are combined, it is not easy for a single horizontal vortex to be formed in the cylinder 1.

[0075] With the above structure, a single rotation of the drive shaft 4 simultaneously drives the rotating frame 5 to revolve, the follower shaft 8 to rotate, the bottom shovel 10 and the side wall shovel 11 to scrape, the inclined conveying pipe 12 to convey upwards, and the upward conveying pipe 19 to spray. The wastewater in the cylinder 1 can be mixed synchronously in the horizontal and vertical directions, thereby improving the mixing sufficiency of polyester wastewater before flocculation and sedimentation treatment.

Claims

1. A flocculation and sedimentation treatment device for polyester wastewater, comprising a cylindrical body (1), characterized in that: A reducer (2) is installed on the cylinder (1). The extended end of the reducer (2) is connected to the drive shaft (4) inserted into the cylinder (1). The lower end of the drive shaft (4) is connected to the rotating frame (5). A fixed wheel (6) is fixed on the cylinder (1). The rotating frame (5) is connected to the follower shaft (8) via the rotating sleeve (7). The upper end of the follower shaft (8) is provided with a follower wheel (9) that meshes with the fixed wheel (6). The lower end of the follower shaft (8) is connected to the inclined delivery pipe (12). The upper end of the inclined delivery pipe (12) is connected to the spray ring (13). The outer wall of the inclined delivery pipe (12) is connected to the reversing pipe (23). The reversing pipe (23) is connected to the pitch disc (24). The rotating frame (5) is also connected to the upper delivery pipe (19). The upper delivery pipe (19) is connected to the horn mouth (20) and the spray hole (21).

2. The polyester wastewater flocculation and sedimentation treatment device according to claim 1, characterized in that: The motor (3) is mounted on the reducer (2), the reducer (2) is fixedly mounted on the upper end of the cylinder (1), and the fixed wheel (6) is sleeved on the outside of the transmission shaft (4) and fixedly connected to the upper end of the cylinder (1).

3. The polyester wastewater flocculation and sedimentation treatment device according to claim 1, characterized in that: Two rotating sleeves (7) are installed on the rotating frame (5). Each rotating sleeve (7) is rotatably connected to a follower shaft (8). Each follower shaft (8) has a follower wheel (9) installed at its upper end. Both follower wheels (9) mesh with the fixed wheel (6).

4. The polyester wastewater flocculation and sedimentation treatment device according to claim 1, characterized in that: The rotating frame (5) is equipped with a bottom shovel (10) and a side wall shovel (11) at its end. The bottom shovel (10) is set close to the bottom of the cylinder (1), and the side wall shovel (11) is set close to the side wall of the cylinder (1).

5. The polyester wastewater flocculation and sedimentation treatment device according to claim 1, characterized in that: Two inclined delivery pipes (12) are fixedly installed at the lower end of each follower shaft (8), and the upper ends of the two inclined delivery pipes (12) are respectively fixedly connected to the spray ring (13). Multiple annular holes (14) are opened on the outer wall of the spray ring (13).

6. The polyester wastewater flocculation and sedimentation treatment device according to claim 5, characterized in that: Bottom plates (15) are installed at the lower ends of the two inclined feeding pipes (12), bottom sleeves (16) are installed in the middle of the bottom plates (15), outer wall rods (17) are installed at the ends of the rotating frame (5), and the lower end of the outer wall rods (17) is connected to the upper feeding pipe (19) via the connecting plate (18). The bottom sleeves (16) are rotatably connected inside the upper feeding pipe (19).

7. The polyester wastewater flocculation and sedimentation treatment device according to claim 6, characterized in that: Multiple horn-shaped openings (20) are connected to the side wall of the upper feed pipe (19), and a spray hole (21) is opened at the upper end of the upper feed pipe (19). The horn-shaped openings (20) are connected to the spray hole (21) through the upper feed pipe (19).

8. The polyester wastewater flocculation and sedimentation treatment device according to claim 6, characterized in that: An inner flow plate (22) is installed on the outer wall rod (17). The inner flow plate (22) is located outside the upper feed pipe (19) and is arranged in the direction of the axis of the cylinder (1). It is used to guide the wastewater to collect near the upper feed pipe (19) when the outer wall rod (17) rotates with the rotating frame (5).

9. The polyester wastewater flocculation and sedimentation treatment device according to claim 5, characterized in that: Multiple reversing pipes (23) are connected to the outer wall of the inclined pipe (12). The other ends of the multiple reversing pipes (23) are connected to the pitch disc (24). The upper diameter of the pitch disc (24) is smaller than the lower diameter.

10. The polyester wastewater flocculation and sedimentation treatment device according to claim 9, characterized in that: The inclined delivery pipe (12) extends obliquely from bottom to top in a direction away from the follower shaft (8), and multiple reversing pipes (23) are arranged at intervals along the length of the inclined delivery pipe (12). The lower end of the pitch plate (24) is set close to the bottom plate (15), and the spray ring (13) is located at the upper end of the inclined delivery pipe (12).

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