A PPS wastewater pretreatment device and method based on efficient coagulation sedimentation

Abstract

The application discloses a PPS wastewater pretreatment device and method based on efficient coagulation sedimentation, and belongs to the technical field of sewage treatment, which comprises a pretreatment pool, a guide groove in annular structure is formed in the outer wall of the pretreatment pool, guide grooves are annularly arranged at the top end of the outer wall of the pretreatment pool, and a guide ring is rotatably connected to the outside of the guide groove. The guide ring, the guide groove and the driving wheel and other components are arranged, the cooperation between the driving wheel and the guide groove driven by the servo motor enables the guide ring to stably rotate along the outer wall of the pretreatment pool, and drives the scum removing seat to move along the annular track. The device can automatically remove the scum on the whole periphery of the liquid surface of the pretreatment pool, does not need manual intervention or external salvage equipment, and solves the problems of long-term accumulation of scum, over-standard suspended solids in effluent and deterioration of the operation environment caused by low efficiency and incomplete cleaning of manual cleaning in the prior art.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and in particular to a PPS wastewater pretreatment device and method based on high-efficiency coagulation and sedimentation. Background Technology

[0002] Polyphenylene sulfide (PPS), a high-performance thermoplastic engineering plastic, is widely used in the electronics, automotive, environmental protection, and aerospace industries. Its production process usually adopts solution polymerization or sulfur solution polycondensation. In this process, a large amount of high-concentration, high-salt, and high-suspended-solids organic wastewater is generated. The typical characteristics of this wastewater are: strong acidity or strong alkalinity (depending on the specific process stage), a large number of unreacted PPS resin fine particles (particle size mostly 0.5-50μm), oligomer colloids, and a small amount of surfactant and solvent residues (such as N-methylpyrrolidone).

[0003] During the coagulation / flocculation process of PPS wastewater, due to the presence of small amounts of oil, low-density oligomers, and scum formed by the incomplete reaction of some added organic polymer coagulants (such as polyacrylamide), coupled with the floc flotation effect, a layer of stable floating impurities often accumulates in the pretreatment tank. This layer of impurities mainly consists of light PPS fine powder, oily substances, and floc fragments. If not removed in time, it will hinder the contact between the water and the atmosphere, affect the stability of pH and dissolved oxygen conditions, and enter the subsequent sedimentation tank with the water flow, resulting in excessive suspended solids in the effluent. Furthermore, long-term accumulation can lead to hardening, foul odor, and deterioration of the operating environment. Summary of the Invention

[0004] The purpose of this invention is to address the problem in the prior art where a stable layer of floating impurities often accumulates in pretreatment tanks. This layer of impurities mainly consists of light PPS fine powder, oily substances, and flocculent fragments. If not removed in time, it will hinder the contact between the water and the atmosphere, affect pH stability and dissolved oxygen conditions, and enter the subsequent sedimentation tank with the water flow, leading to excessive suspended solids in the effluent. Furthermore, long-term accumulation can cause hardening, foul odor, and deterioration of the operating environment. Therefore, this invention proposes a PPS wastewater pretreatment device and method based on efficient coagulation and sedimentation.

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

[0006] A PPS wastewater pretreatment device and method based on high-efficiency coagulation and sedimentation includes a pretreatment tank. An annular guide groove is formed on the outer wall of the pretreatment tank. A guide groove is formed in an annular array at the top of the outer wall of the pretreatment tank. A guide ring is rotatably connected to the outer side of the guide groove. Two connecting supports are fixedly connected to the outer wall of the guide ring. The two connecting supports are symmetrically fixed on the left and right sides of the outer wall of the guide ring. A servo motor is fixedly connected to the bottom end of each connecting support. A drive wheel is mounted on the top output shaft of the servo motor. The drive wheel matches the guide groove. The servo motor drives the drive wheel to rotate and drives the guide ring to rotate along the guide groove. A support frame is fixedly connected to the top surface of the connecting support, and the support frame is arranged longitudinally.

[0007] Preferably, there are two support frames, and a support beam is fixedly connected to the top of each support frame. Four support side plates are fixedly connected in a straight array on the top surface of the support beam, wherein every two horizontally adjacent support side plates form a group. A connecting shaft is fixedly connected to the bottom of the support beam, and a mixing component is fixedly connected to the outer wall of the connecting shaft. The mixing component and the connecting shaft together form a stirring structure for the liquid in the pretreatment tank. The mixing component has an arc-shaped structure.

[0008] Preferably, the two sets of support side plates are linearly arrayed and fixedly disposed on the top surface of the support beam. A take-up and release motor is fixedly connected to the outer side of each set of support side plates. A take-up and release roller is installed on the output shaft of the take-up and release motor, and the take-up and release motor is used to drive the take-up and release roller to rotate.

[0009] Preferably, two traction ropes are wound around the outer side of the take-up and release rollers. A connecting guide ring is fixedly connected to the side of the traction ropes away from the take-up and release rollers. A connecting hanging ring is fixedly connected to the side of the connecting guide ring away from the traction ropes. A scum removal seat is fixedly connected to the side of the connecting hanging ring away from the connecting guide ring.

[0010] Preferably, the scum removal seat is a hollow cylindrical structure. One end of the scum removal seat is provided with a liquid inlet groove. A liquid inlet scraper is fixedly connected to the same side of the scum removal seat. The liquid inlet scraper is used to guide the liquid and scum into the interior of the scum removal seat. The outer wall of the scum removal seat has a linear array of seepage holes for discharging excess liquid.

[0011] Preferably, two floating wooden pieces are symmetrically fixedly connected to the bottom of the outer wall of the scum removal seat. The floating wooden pieces are used to provide buoyancy support for the scum removal seat. A support base plate is fixedly connected to the inner side of the support side plate. The support base plate is arranged horizontally.

[0012] Preferably, two extraction tubes are fixedly connected in a linear array inside the support substrate. The side of the extraction tube away from the support substrate is connected to a negative pressure pump. An extraction connector is fixedly connected to the side of the extraction tube away from the support substrate. The extraction connector is located inside the scum removal seat.

[0013] Preferably, the extraction connector is in communication with the extraction tube, and the extraction connector is used to extract scum from inside the scum removal seat. The extraction connector and the extraction tube together form a structure for rapid removal of scum.

[0014] Preferably, a connecting support is fixedly connected to the bottom surface of the scum removal seat, and a counterweight ball is fixedly connected to the bottom end of the connecting support. The counterweight ball and the connecting support together form a pulling and limiting structure for the scum removal seat, and are used to limit the scum removal seat to always be in contact with the water in the pretreatment water tank.

[0015] This invention discloses a method for pretreatment of PPS wastewater based on a high-efficiency coagulation and sedimentation device, comprising the following steps:

[0016] S1. The operator starts the take-up and discharge machine, which drives the take-up and discharge rollers to rotate. The take-up and discharge rollers release the traction rope wrapped around their outer side. The traction rope drives the scum removal seat to descend until it contacts the water surface in the pretreatment tank through the connecting guide ring and the connecting hanging ring.

[0017] S2. Two floating wooden pieces symmetrically fixed at the bottom of the outer wall of the scum removal seat are in contact with the water and provide upward buoyancy. At the same time, the connecting pillar and counterweight ball fixed on the bottom surface of the scum removal seat provide downward pull under the action of gravity. The combined action of buoyancy and pull keeps the scum removal seat in a stable posture and floats against the water surface.

[0018] S3. The operator starts the servo motor, which drives the drive wheel to rotate. The drive wheel meshes with the guide grooves in the annular array at the top of the pretreatment water tank, causing the guide ring to rotate along the guide grooves in the annular structure on the outer wall of the pretreatment water tank. The guide ring drives the connecting support, support frame, support beam and support side plate to move along the annular trajectory.

[0019] S4. The supporting beam drives the connecting shaft and mixing component fixed at its bottom to move inside the pretreatment water tank. The mixing component disturbs the water, causing the suspended solids in the water to come into contact with the coagulant and form flocs.

[0020] S5. The scum removal seat moves along the circumference of the pretreatment water tank with the support beam. The liquid inlet scraper fixed at one end of the scum removal seat guides the scum floating on the surface of the water to the liquid inlet tank. The scum enters the scum removal seat with the liquid. Excess liquid is discharged into the pretreatment water tank through the seepage hole. The scum is trapped inside the scum removal seat.

[0021] S6. The operator starts the negative pressure pump connected to the extraction pipe. The extraction pipe generates negative pressure inside the scum removal seat through the extraction connector. The extraction connector sucks the trapped scum into the extraction pipe and discharges it to the outside of the pretreatment water tank.

[0022] S7. When the liquid level in the pretreatment tank changes, the operator restarts the retractor. The retractor drives the retractor roller to extend or retract the length of the traction rope, so that the scum removal seat adjusts its height synchronously with the rise and fall of the liquid level.

[0023] S8. When it is necessary to stop the slag removal operation, the operator turns off the servo motor and negative pressure pump, and starts the retractor to rotate in reverse. The retractor pulley winds up the traction rope, and the traction rope lifts the slag removal seat to the top of the pretreatment water tank through the connecting guide ring and connecting hanging ring.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0025] 1. In this invention, by setting up components such as a guide ring, a guide groove, and a drive wheel, and by using a servo motor to drive the drive wheel and the guide groove, the guide ring can rotate stably along the outer wall of the pretreatment water tank, and drive the scum removal seat to move along a circular trajectory. This device can automatically remove scum from the entire circumference of the pretreatment water tank without manual intervention or external retrieval equipment, thus solving the problems of low efficiency and incomplete cleaning by manual cleaning in the prior art, which leads to long-term accumulation of scum, excessive suspended solids in the effluent, and deterioration of the operating environment.

[0026] 2. In this invention, by setting up components such as floating logs, counterweight balls, and connecting pillars, the synergistic effect between the buoyancy provided by the floating logs and the tension provided by the counterweight balls ensures that the scum removal seat maintains a stable posture and floats against the water surface. At the same time, through the cooperation of the liquid inlet scraper, liquid inlet tank, and seepage hole, the scum and liquid are automatically separated after entering the scum removal seat. This device can adapt to changes in different liquid levels and achieve low water content collection of scum, solving the problems of existing removal devices being unable to adapt to water level fluctuations and the high water content of collected scum leading to a heavy burden on subsequent processing.

[0027] 3. In this invention, by setting up components such as extraction pipes and extraction connectors, the extraction connectors move synchronously with the scum removal seat and continuously generate negative pressure suction, so that the scum entering the scum removal seat is quickly transferred to the outside of the pretreatment water tank. At the same time, through the cooperation of traction ropes, retractable rollers and retractable motors, the scum removal seat can be raised above the liquid surface after the operation is completed. This device can realize the continuous discharge of scum and convenient maintenance of equipment, and solves the problems of discontinuous scum removal, easy damage to equipment due to long-term immersion in corrosive water, and the impact of cleaning operation interruption on subsequent processing in the prior art. Attached Figure Description

[0028] Figure 1 This is a cross-sectional front view of the PPS wastewater pretreatment device and method based on high-efficiency coagulation sedimentation proposed in this invention.

[0029] Figure 2 This is a schematic diagram of the overall front view of the PPS wastewater pretreatment device and method based on high-efficiency coagulation sedimentation proposed in this invention.

[0030] Figure 3 This is a schematic diagram of the overall rear view of the PPS wastewater pretreatment device and method based on high-efficiency coagulation and sedimentation proposed in this invention.

[0031] Figure 4 This is a schematic diagram of the connection support and guide ring combination structure of a PPS wastewater pretreatment device and method based on high-efficiency coagulation sedimentation proposed in this invention.

[0032] Figure 5 This is a schematic diagram of the combined structure of the scum removal seat and the liquid inlet tank in a PPS wastewater pretreatment device and method based on high-efficiency coagulation sedimentation proposed in this invention.

[0033] Figure 6 This is a top view schematic diagram of the overall structure of the PPS wastewater pretreatment device and method based on high-efficiency coagulation sedimentation proposed in this invention.

[0034] Figure 7 This invention proposes a PPS wastewater pretreatment device and method based on high-efficiency coagulation and sedimentation. Figure 2 Enlarged structural diagram at point A in the middle;

[0035] Figure 8 This invention proposes a PPS wastewater pretreatment device and method based on high-efficiency coagulation and sedimentation. Figure 3 Enlarged structural diagram at point B.

[0036] In the diagram: 1. Pretreatment tank; 101. Drainage pipe; 1011. Drainage pump; 2. Guide groove; 201. Guide groove; 3. Connecting support; 301. Guide ring; 3011. Servo motor; 3012. Drive wheel; 4. Support frame; 401. Support beam; 4011. Support side plate; 4012. Retractor / discharge motor; 4013. Retractor / discharge roller; 5. Traction rope; 501. Connecting guide ring; 5011. Connecting hanging ring; 6. Scum removal seat; 601. Liquid inlet tank; 6011. Liquid inlet scraper; 6012. Leakage hole; 6013. Floating wood component; 7. Support base plate; 701. Extraction pipe; 7011. Extraction connector; 7012. Connecting support column; 7013. Counterweight ball; 7014. Connecting shaft; 7015. Mixing component. Detailed Implementation

[0037] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0038] Example, refer to Figure 1 - Figure 8 A pretreatment device and method for PPS wastewater based on high-efficiency coagulation and sedimentation includes a pretreatment tank 1. An annular guide groove 2 is formed on the outer wall of the pretreatment tank 1. A guide groove 201 is formed in an annular array at the top of the outer wall of the pretreatment tank 1. A guide ring 301 is rotatably connected to the outer side of the guide groove 2. Two connecting supports 3 are fixedly connected to the outer wall of the guide ring 301. The two connecting supports 3 are symmetrically fixed on the left and right sides of the outer wall of the guide ring 301, and the bottom ends of both connecting supports 3 are fixed. A servo motor 3011 is fixedly connected to the top of the support 3. A drive wheel 3012 is mounted on the top output shaft of the servo motor 3011. The drive wheel 3012 matches the guide groove 201. The servo motor 3011 drives the drive wheel 3012 to rotate and drives the guide ring 301 to rotate along the guide groove 2. A support frame 4 is fixedly connected to the top surface of the connecting support 3. The support frame 4 is arranged longitudinally, and there are two support frames 4. The top of the two support frames 4 is fixedly connected to a support beam 401. The top surface of the support beam 401 is straight. The linear array is fixedly connected to four supporting side plates 4011, with each pair of laterally adjacent supporting side plates 4011 forming a group. A connecting shaft 7014 is fixedly connected to the bottom end of the supporting beam 401. A mixing component 7015 is fixedly connected to the outer wall of the connecting shaft 7014. The mixing component 7015 and the connecting shaft 7014 together form a stirring structure for the liquid in the pretreatment tank 1. The mixing component 7015 has an arc-shaped structure, enabling the guide ring 301 to rotate stably along the outer wall of the pretreatment tank 1, thereby driving the entire scum removal process. The device moves along a circular trajectory, solving the problem that fixed cleaning equipment cannot fully cover the water surface of the pool and has cleaning dead corners. Two sets of support side plates 4011 are linearly arrayed and fixedly set on the top surface of the support beam 401. A take-up and discharge motor 4012 is fixedly connected to the outside of both sets of support side plates 4011. A take-up and discharge roller 4013 is installed on the output shaft of the take-up and discharge motor 4012. The take-up and discharge motor 4012 is used to drive the take-up and discharge roller 4013 to rotate. A drain pipe 101 with a drain pump 1011 is fixedly connected to the outside of the pretreatment pool 1.

[0039] Furthermore, two traction ropes 5 are wound around the outer side of the take-up and release roller 4013. A connecting guide ring 501 is fixedly connected to the side of the traction rope 5 away from the take-up and release roller 4013. A connecting hanging ring 5011 is fixedly connected to the side of the connecting guide ring 501 away from the traction rope 5. A scum removal seat 6 is fixedly connected to the side of the connecting hanging ring 501 away from the connecting guide ring 501. The scum removal seat 6 is a hollow cylindrical structure. A liquid inlet groove 601 is opened at one end of the scum removal seat 6. A liquid inlet scraper 6011 is fixedly connected to the same side of the scum removal seat 6. The liquid inlet scraper 6011 is used to guide the liquid and scum. Entering the interior of the scum removal seat 6, the outer wall of the scum removal seat 6 has a linear array of seepage holes 6012 for draining excess liquid. This allows the mixing component 7015 to stir the liquid in the pretreatment tank 1 as it moves with the support beam 401, promoting thorough mixing of the coagulant and wastewater and solving the problems of uneven agent dispersion and insufficient flocculation reaction. Two floating wooden pieces 6013 are symmetrically fixedly connected to the bottom of the outer wall of the scum removal seat 6. The floating wooden pieces 6013 are used to provide buoyancy support for the scum removal seat 6. A support base plate 7 is fixedly connected to the inner side of the support side plate 4011. The support base plate 7 is arranged horizontally.

[0040] Furthermore, two extraction tubes 701 are fixedly connected in a linear array inside the support base plate 7. The side of the extraction tube 701 furthest from the support base plate 7 is connected to a negative pressure pump. An extraction connector 7011 is fixedly connected to the side of the extraction tube 701 furthest from the support base plate 7. The extraction connector 7011 is located inside the scum removal seat 6 and communicates with the extraction tube 701. The extraction connector 7011 is used to extract scum from inside the scum removal seat 6. The extraction connector 7011 and the extraction tube 701 together form a rapid scum removal system. The quick-removal structure enables the retraction and release control of the traction rope 5 by the retraction and release roller 4013, solving the problem that the scum removal seat 6 cannot be adjusted according to different water levels and has poor adaptability. A connecting support column 7012 is fixedly connected to the bottom surface of the scum removal seat 6, and a counterweight ball 7013 is fixedly connected to the bottom end of the connecting support column 7012. The counterweight ball 7013 and the connecting support column 7012 together form a pulling and limiting structure for the scum removal seat 6, and are used to limit the scum removal seat 6 to always be in contact with the water in the pretreatment pool 1.

[0041] This invention discloses a method for pretreatment of PPS wastewater based on a high-efficiency coagulation and sedimentation device, comprising the following steps:

[0042] S1. The operator starts the take-up and discharge motor 4012. The take-up and discharge motor 4012 drives the take-up and discharge roller 4013 to rotate. The take-up and discharge roller 4013 releases the traction rope 5 wrapped around its outer side. The traction rope 5 drives the scum removal seat 6 to descend until it contacts the water surface in the pretreatment water tank 1 through the connecting guide ring 501 and the connecting hanging ring 5011.

[0043] S2. Two floating wooden pieces 6013 symmetrically fixed at the bottom of the outer wall of the scum removal seat 6 are in contact with the water and provide upward buoyancy. At the same time, the connecting pillar 7012 and the counterweight ball 7013 fixed on the bottom surface of the scum removal seat 6 provide downward pull under the action of gravity. The combined action of buoyancy and pull makes the scum removal seat 6 maintain a stable posture and float in contact with the water surface.

[0044] S3. The operator starts the servo motor 3011, which drives the drive wheel 3012 to rotate. The drive wheel 3012 meshes with the guide groove 201 opened in the annular array at the top of the outer wall of the pretreatment water tank 1, which drives the guide ring 301 to rotate along the guide groove 2 of the annular structure opened on the outer wall of the pretreatment water tank 1. The guide ring 301 drives the connecting support 3, the support frame 4, the support beam 401 and the support side plate 4011 to move along the annular trajectory as a whole.

[0045] S4. The supporting beam 401 drives the connecting shaft 7014 and the mixing component 7015 fixed at its bottom to move inside the pretreatment water tank 1. The mixing component 7015 disturbs the water, causing the suspended solids in the water to come into contact with the coagulant and form flocs.

[0046] S5. The scum removal seat 6 moves along the circumference of the pretreatment water tank 1 with the support beam 401. The liquid inlet scraper 6011 fixed at one end of the scum removal seat 6 guides the scum floating on the surface of the water to the liquid inlet tank 601. The scum enters the interior of the scum removal seat 6 with the liquid. Excess liquid is discharged into the pretreatment water tank 1 through the seepage hole 6012. The scum is trapped inside the scum removal seat 6.

[0047] S6. The operator starts the negative pressure pump connected to the extraction pipe 701. The extraction pipe 701 generates negative pressure inside the scum removal seat 6 through the extraction connector 7011. The extraction connector 7011 sucks the trapped scum into the extraction pipe 701 and discharges it to the outside of the pretreatment water tank 1.

[0048] S7. When the liquid level in the pretreatment tank 1 changes, the operator restarts the retractor 4012. The retractor 4012 drives the retractor roller 4013 to retract the length of the traction rope 5, so that the scum removal seat 6 adjusts its height synchronously with the rise and fall of the liquid level.

[0049] S8. When it is necessary to stop the slag removal operation, the operator turns off the servo motor 3011 and the negative pressure pump, and starts the retractor 4012 to rotate in the reverse direction. The retractor 4013 winds up the traction rope 5. The traction rope 5 lifts the slag removal seat 6 above the pretreatment water tank 1 through the connecting guide ring 501 and the connecting hanging ring 5011.

[0050] In use, when pretreatment is required, the operator starts the take-up and release motor 4012. The take-up and release motor 4012 drives the take-up and release rollers 4013 to rotate, releasing the traction rope 5 wound around its outer side. The traction rope 5, through the connecting guide ring 501 and the connecting hanging ring 5011, drives the scum removal seat 6 to descend until it contacts the water surface in the pretreatment pool 1. Two floating wooden pieces 6013 symmetrically fixed to the bottom of the outer wall of the scum removal seat 6 contact the water and provide upward buoyancy. At the same time, the connecting support column 7012 and the counterweight ball 7013 fixed to the bottom surface of the scum removal seat 6 provide downward pull under the action of gravity. The combined action of buoyancy and pull keeps the scum removal seat 6 in a stable posture and always in contact with the water. The liquid surface floats; the operator starts the servo motor 3011, which drives the drive wheel 3012 to rotate. The drive wheel 3012 meshes with the guide groove 201 opened in the annular array at the top of the outer wall of the pretreatment water tank 1, which drives the guide ring 301 to rotate along the guide groove 2 of the annular structure opened on the outer wall of the pretreatment water tank 1. The guide ring 301 drives the connecting support 3, the support frame 4, the support beam 401 and the support side plate 4011 to move along the annular trajectory. The support beam 401 drives the connecting shaft 7014 and the mixing component 7015 fixed at its bottom to move inside the pretreatment water tank 1. The mixing component 7015 disturbs the water, so that the suspended solids in the water come into full contact with the coagulant and form flocs.

[0051] The scum removal seat 6 moves circumferentially along the support beam 401 along the pretreatment water tank 1. The inlet scraper 6011 fixed at one end of the scum removal seat 6 guides the scum floating on the water surface to the inlet tank 601. The scum enters the scum removal seat 6 with a small amount of liquid, while excess liquid is discharged into the pretreatment water tank 1 through the seepage hole 6012. The scum is retained inside the scum removal seat 6. The operator starts the negative pressure pump connected to the extraction pipe 701. The extraction pipe 701 generates negative pressure inside the scum removal seat 6 through the extraction connector 7011. The extraction connector 7011 draws the retained scum into the extraction pipe 701 and discharges it. The scum removal seat 6 is moved to the outside of the pretreatment tank 1. When the liquid level in the pretreatment tank 1 changes, the operator restarts the retractor 4012. The retractor 4012 drives the retractor roller 4013 to extend or retract the length of the traction rope 5, so that the height of the scum removal seat 6 is adjusted synchronously with the rise and fall of the liquid level. When it is necessary to stop the scum removal operation, the operator turns off the servo motor 3011 and the negative pressure pump, and starts the retractor 4012 to rotate in the opposite direction. The retractor roller 4013 winds up the traction rope 5. The traction rope 5 lifts the scum removal seat 6 above the pretreatment tank 1 through the connecting guide ring 501 and the connecting hanging ring 5011.

[0052] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A PPS wastewater pretreatment device based on high-efficiency coagulation and sedimentation, comprising a pretreatment tank (1), characterized in that, The pretreatment water tank (1) has an annular guide groove (2) on its outer wall. A guide groove (201) is arranged in an annular array at the top of the outer wall of the pretreatment water tank (1). A guide ring (301) is rotatably connected to the outer side of the guide groove (2). A connecting support (3) is fixedly connected to the outer wall of the guide ring (301). There are two connecting supports (3), which are symmetrically fixed on the left and right sides of the outer wall of the guide ring (301). The bottom end of each of the servo motors (3011) is fixedly connected to a servo motor (3011). A drive wheel (3012) is installed on the top output shaft of the servo motor (3011). The drive wheel (3012) matches the guide groove (201). The servo motor (3011) is used to drive the drive wheel (3012) to rotate and to drive the guide ring (301) to rotate along the guide groove (2). A support frame (4) is fixedly connected to the top surface of the connecting support (3). The support frame (4) is arranged longitudinally.

2. The PPS wastewater pretreatment device based on high-efficiency coagulation and sedimentation according to claim 1, characterized in that, There are two support frames (4). The top of the two support frames (4) is fixedly connected to a support beam (401). Four support side plates (4011) are fixedly connected in a straight array on the top surface of the support beam (401). Each pair of horizontally adjacent support side plates (4011) forms a group. The bottom of the support beam (401) is fixedly connected to a connecting shaft (7014). A mixing component (7015) is fixedly connected to the outer wall of the connecting shaft (7014). The mixing component (7015) and the connecting shaft (7014) together form a stirring structure for the liquid in the pretreatment tank (1). The mixing component (7015) is an arc-shaped structure. A drain pipe (101) with a drain pump (1011) is fixedly connected to the outside of the pretreatment tank (1).

3. The PPS wastewater pretreatment device based on high-efficiency coagulation and sedimentation according to claim 2, characterized in that, Two sets of support side plates (4011) are linearly arrayed and fixedly installed on the top surface of the support beam (401). Both sets of support side plates (4011) are fixedly connected to a take-up and release motor (4012). A take-up and release roller (4013) is installed on the output shaft of the take-up and release motor (4012). The take-up and release motor (4012) is used to drive the take-up and release roller (4013) to rotate.

4. The PPS wastewater pretreatment device based on high-efficiency coagulation and sedimentation according to claim 3, characterized in that, Two traction ropes (5) are wound around the outside of the take-up and release roller (4013). A connecting guide ring (501) is fixedly connected to the side of the traction rope (5) away from the take-up and release roller (4013). A connecting hanging ring (5011) is fixedly connected to the side of the connecting guide ring (501) away from the traction rope (5). A scum removal seat (6) is fixedly connected to the side of the connecting hanging ring (5011) away from the connecting guide ring (501).

5. The PPS wastewater pretreatment device based on high-efficiency coagulation and sedimentation according to claim 4, characterized in that, The scum removal seat (6) is a hollow cylindrical structure. One end of the scum removal seat (6) is provided with a liquid inlet groove (601). A liquid inlet scraper (6011) is fixedly connected to the same side of the scum removal seat (6). The liquid inlet scraper (6011) is used to guide the liquid and scum into the interior of the scum removal seat (6). The outer wall of the scum removal seat (6) has a linear array of seepage holes (6012) for discharging excess liquid.

6. The PPS wastewater pretreatment device based on high-efficiency coagulation and sedimentation according to claim 4, characterized in that, Two floating wood pieces (6013) are symmetrically fixedly connected to the bottom of the outer wall of the scum removal seat (6). The floating wood pieces (6013) are used to provide buoyancy support for the scum removal seat (6). A support base plate (7) is fixedly connected to the inner side of the support side plate (4011). The support base plate (7) is arranged horizontally.

7. The PPS wastewater pretreatment device based on high-efficiency coagulation and sedimentation according to claim 6, characterized in that, The support base plate (7) has two extraction tubes (701) fixedly connected in a linear array inside. The side of the extraction tube (701) away from the support base plate (7) is connected to a negative pressure pump. The extraction tube (701) is fixedly connected to an extraction connector (7011) on the side of the extraction tube (701) away from the support base plate (7). The extraction connector (7011) is located inside the scum removal seat (6).

8. The PPS wastewater pretreatment device based on high-efficiency coagulation and sedimentation according to claim 7, characterized in that, The extraction connector (7011) is connected to the extraction tube (701). The extraction connector (7011) is used to extract scum from the inside of the scum removal seat (6). The extraction connector (7011) and the extraction tube (701) together form a rapid scum removal structure.

9. A PPS wastewater pretreatment device based on high-efficiency coagulation and sedimentation according to claim 4, characterized in that, A connecting support column (7012) is fixedly connected to the bottom surface of the scum removal seat (6). A counterweight ball (7013) is fixedly connected to the bottom end of the connecting support column (7012). The counterweight ball (7013) and the connecting support column (7012) together form a pulling and limiting structure for the scum removal seat (6) and are used to limit the scum removal seat (6) from always being in contact with the water in the pretreatment pool (1).

10. The method for PPS wastewater pretreatment based on high-efficiency coagulation and sedimentation according to claims 1-9, characterized in that, Includes the following steps: S1. The operator starts the take-up and discharge machine (4012). The take-up and discharge machine (4012) drives the take-up and discharge roller (4013) to rotate. The take-up and discharge roller (4013) releases the traction rope (5) wrapped around its outer side. The traction rope (5) drives the scum removal seat (6) to descend until it contacts the water surface in the pretreatment pool (1) through the connecting guide ring (501) and the connecting hanging ring (5011). S2. Two floating wooden pieces (6013) symmetrically fixed at the bottom of the outer wall of the scum removal seat (6) are in contact with the water and provide upward buoyancy. At the same time, the connecting pillar (7012) and the counterweight ball (7013) fixed on the bottom surface of the scum removal seat (6) provide downward pull under the action of gravity. The combined action of buoyancy and pull makes the scum removal seat (6) maintain a stable posture and float against the water surface. S3. The operator starts the servo motor (3011), which drives the drive wheel (3012) to rotate. The drive wheel (3012) meshes with the guide groove (201) opened in the annular array at the top of the outer wall of the pretreatment pool (1), which drives the guide ring (301) to rotate along the guide groove (2) of the annular structure opened on the outer wall of the pretreatment pool (1). The guide ring (301) drives the connecting support (3), the support frame (4), the support beam (401) and the support side plate (4011) to move along the annular trajectory as a whole. S4. The supporting beam (401) drives the connecting shaft (7014) and the mixing component (7015) fixed at its bottom end to move inside the pretreatment water tank (1). The mixing component (7015) disturbs the water, causing the suspended solids in the water to come into contact with the coagulant and form flocs. S5. The scum removal seat (6) moves along the circumference of the pretreatment water tank (1) with the support beam (401). The liquid inlet scraper (6011) fixed at one end of the scum removal seat (6) guides the scum floating on the surface of the water to the liquid inlet tank (601). The scum enters the scum removal seat (6) with the liquid. Excess liquid is discharged into the pretreatment water tank (1) through the seepage hole (6012). The scum is trapped inside the scum removal seat (6). S6. The operator starts the negative pressure pump connected to the extraction pipe (701). The extraction pipe (701) generates negative pressure inside the scum removal seat (6) through the extraction connector (7011). The extraction connector (7011) sucks the intercepted scum into the extraction pipe (701) and discharges it to the outside of the pretreatment water tank (1). S7. When the liquid level in the pretreatment tank (1) changes, the operator starts the retractor (4012) again. The retractor (4012) drives the retractor roller (4013) to retract the length of the traction rope (5), so that the scum removal seat (6) adjusts its height synchronously with the rise and fall of the liquid level. S8. When it is necessary to stop the slag removal operation, the operator turns off the servo motor (3011) and the negative pressure pump, and starts the retractor (4012) to rotate in the opposite direction. The retractor (4013) winds up the traction rope (5). The traction rope (5) lifts the slag removal seat (6) above the pretreatment water tank (1) through the connecting guide ring (501) and the connecting hanging ring (5011).

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