Multi-stage filtration sewage treatment device

Abstract

The invention belongs to the technical field of sewage treatment, and discloses a multi-stage filtration sewage treatment device which comprises a treatment box and two treatment barrels arranged on the side face, a water pump is installed between the treatment box and the treatment barrels, a primary filtration box is fixed to the upper end of the treatment box, a liquid inlet pipe is connected to the upper end of the primary filtration box, and a filtration hopper is connected to the lower end of the primary filtration box. Through holes are formed in two sides of the filter hopper. According to the sewage treatment device with the multi-stage filtering function, the primary filtering impurity treatment efficiency is optimized, the problems that a traditional device is frequently blocked and tedious to clean are solved, and compared with an existing primary filtering device which mostly adopts a single filter screen, impurities are likely to be accumulated and blocked are solved; water is uniformly distributed in cooperation with the inverted-V-shaped flow guide plate, the blocking probability of slag chippings and flocculent residues in sewage is greatly reduced, meanwhile, automatic impurity stirring is achieved, and impurity treatment is rapidly achieved in combination with a collecting structure.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, specifically to a multi-stage filtration wastewater treatment device. Background Technology

[0002] With the continuous development of the industrial sector, a large amount of complex industrial wastewater is generated during the production process. This wastewater is often accompanied by acid-base imbalance, suspended solids such as metallurgical slag fragments, and excessive chemical reaction residues. If it is discharged directly without effective treatment, it will seriously pollute the soil, groundwater, and aquatic ecosystems, threaten human health, and also restrict the green transformation and sustainable development of the industry. Therefore, it is necessary to use wastewater treatment equipment to purify it and reduce environmental pollution.

[0003] However, existing multi-stage filtration wastewater treatment devices still have certain problems in use:

[0004] A multi-stage filtration wastewater processor, such as the one described in Chinese patent application number CN218620549U, includes a wastewater treatment tank and a filtration mechanism. The wastewater treatment tank contains, from left to right, a sedimentation tank, a filtration tank, and a disinfection tank. An inlet pipe communicating with the sedimentation tank is located on the left side of the wastewater treatment tank, and a drain pipe communicating with the disinfection tank is located on the right side of the wastewater treatment tank. The filtration mechanism is located inside the filtration tank. A drain pipe is located at the drain outlet on the left side of the front of the wastewater treatment tank, and the drain pipe communicates with the lower end of the sedimentation tank. The sedimentation tank contains a baffle corresponding to the inlet pipe.

[0005] While existing wastewater filtration devices can achieve multi-stage filtration, the waste residue left after filtration is not easy to handle. After accumulating to a certain amount, it will affect the efficiency of subsequent filtration. At the same time, the accumulation of residue also increases the probability of clogging.

[0006] To address the aforementioned issues, an innovative design was implemented based on the existing multi-stage filtration wastewater treatment device. Summary of the Invention

[0007] The purpose of this invention is to provide a multi-stage filtration wastewater treatment device to solve the problems mentioned in the background art, such as the inconvenience of treating filter residues, the easy accumulation of residues leading to blockages, and the reduction of filtration efficiency.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a multi-stage filtration wastewater treatment device, comprising a treatment tank and two sets of treatment barrels arranged on the side, wherein a water pump is installed between the treatment tank and the treatment barrels.

[0009] A primary filter box is fixed at the upper end of the processing box. An inlet pipe is connected to the upper end of the primary filter box. A filter bucket is connected to the lower end of the primary filter box. Through holes are opened on both sides of the filter bucket. A transmission rod passes through the through holes. A baffle is connected to the transmission rod. A material guide plate is connected to the lower end of the filter bucket. A filter box is installed inside the lower end of the processing box.

[0010] The transmission rod is connected to the transmission frame on the side, and the transmission frame is fixed to the rear end of the guide plate. A guide groove is opened inside the guide plate. The processing box is connected to the rear side of the first motor. The front end of the first motor is connected to the transmission disc. The front end of the transmission disc is connected to the guide shaft. The guide shaft extends into the guide groove.

[0011] The processing tank is equipped with a drive shaft inside, with a second motor connected to the upper end of the drive shaft and a base plate connected to the lower end of the drive shaft. A stirring plate is connected to the upper end of the base plate. A discharge pipe is installed at the upper end of the processing tank, and an auger shaft is installed inside the discharge pipe.

[0012] Preferably, the primary filter box is fixed to the inner wall of the treatment box, the bottom of the primary filter box is designed in a "V" shape, and the upper ends of both sides of the primary filter box are provided with drain ports, which are distributed in an equidistant array.

[0013] Using the above technical solution, the "V"-shaped design at the bottom of the primary filter box can guide impurities such as slag fragments and reaction residues in chemical and metallurgical wastewater to settle to the bottom, avoiding the accumulation of impurities in the box and causing blockage. The equidistant array of drain ports on both sides at the top can make the wastewater that has been pre-filtered flow out evenly, so that the water flows downward in a strip shape, improving the utilization rate of the subsequent filter bucket.

[0014] Preferably, the upper ends of both sides of the filter bucket are connected to guide plates, and the two sets of guide plates are distributed in an inverted "V" shape. The interior of the filter bucket is divided into multiple sets of rectangular spaces. The through hole is designed in an inverted "trapezoidal" shape, and the through hole matches the shape of the baffle. The baffle and the through hole form a sealing design.

[0015] Using the above technical solution, the inverted "V"-shaped guide plate can evenly guide chemical and metallurgical wastewater into multiple rectangular spaces of the filter bucket, achieving zoned interception of impurities and avoiding blockage of a single filtration area due to excessive accumulation of high-concentration impurities. The sealing design of the inverted "trapezoidal" through holes and baffles can prevent leakage of unfiltered wastewater and ensure stable primary filtration effect.

[0016] Preferably, the baffles are distributed in an equidistant array outside the transmission rod, the transmission frame is designed in an "L" shape, the rear end of the transmission frame passes through the guide rod, and both ends of the guide rod are fixed to the inner wall of the processing box.

[0017] Using the above technical solution, the baffles arranged in an equidistant array outside the transmission rod can synchronously control the opening and closing of multiple sets of filter channels, ensuring that the filtration rhythm of each rectangular space in the filter bucket is consistent and avoiding impurity residue caused by uneven local filtration; the cooperation between the "L"-shaped transmission frame and the guide rod can limit the movement trajectory of the transmission frame and prevent the baffle and through hole seal from failing due to shaking when it drives the transmission rod to move. At the same time, when the transmission frame drives the transmission baffle and transmission rod to move horizontally, it can push the residue trapped in the filter bucket to the through holes on both sides for discharge.

[0018] Preferably, the first motor is fixed to the outer wall of the processing box, a partition is provided on the rear side of the processing box, the front shaft end of the first motor extends into the interior of the partition and connects to the transmission disk, the guide shaft is connected to the edge of the transmission disk, and the guide shaft slides in cooperation with the guide groove.

[0019] Using the above technical solution, the first motor is fixed to the outer wall of the treatment tank and connected to the internal transmission structure through the rear partition, which can avoid the motor directly contacting chemical and metallurgical wastewater and greatly extend the service life of the motor. The sliding fit of the guide shaft on the edge of the transmission plate can convert the rotational motion of the motor into the reciprocating motion of the guide plate, thereby driving the transmission rod, baffle and through hole to achieve automatic opening and closing. Impurity cleaning or filtration rhythm adjustment can be completed without manual operation, which is suitable for the continuous treatment needs of chemical and metallurgical wastewater and reduces downtime maintenance time.

[0020] Preferably, the lower end of the filter hopper is connected to a discharge guide plate, which is distributed in a figure-eight shape. Collection hoppers are engaged and installed on both sides of the processing box, extending into the interior of the processing box. The collection hoppers are engaged and installed with the discharge guide plate.

[0021] Using the above technical solution, the figure-eight shaped discharge guide plate can accurately guide the metallurgical slag and chemical residue intercepted by the filter bucket to the collection bucket, avoiding the scattering of impurities in the treatment box and causing secondary pollution; the snap-fit ​​installation method of the collection bucket and the treatment box can be quickly disassembled and cleaned without disassembling the device, which solves the cumbersome problem of disassembling pipelines for impurity cleaning in traditional devices, and can greatly improve maintenance efficiency and reduce labor costs.

[0022] Preferably, the inlet end of the water pump is connected to the bottom of the treatment tank, the outlet end of the water pump is connected to a guide pipe, the end of the guide pipe is connected to a solenoid valve, a guide ring is installed inside the treatment tank, the inner wall of the guide ring is connected to an outlet pipe, the outlet pipes are distributed in a ring array, and the solenoid valve is connected to the guide ring.

[0023] Using the above technical solution, the conductive design between the water pump and the bottom of the treatment tank can completely transport the pre-filtered sewage to the treatment tank. The solenoid valve can control the liquid to enter the treatment tank according to the treatment process. The two sets of treatment tanks work alternately to adapt to different treatment process requirements. The guide ring and annular array liquid outlet pipe inside the treatment tank can make the sewage evenly distributed in the treatment tank, avoid insufficient chemical reaction caused by excessively high local sewage concentration, and improve the pollutant removal efficiency of subsequent treatment units.

[0024] Preferably, the bottom plate is adapted to the inner wall size of the processing tank, the outer side of the stirring plate is designed with an incline, and the stirring plates are arranged in a ring array with the center point of the bottom plate as the axis.

[0025] By adopting the above technical solution, the matching design of the bottom plate and the inner wall of the treatment tank can avoid the formation of dead corners at the bottom of the tank for chemical and metallurgical wastewater, and prevent the accumulation of impurities. The inclined stirring plate, combined with the ring array distribution, can drive the wastewater to form an upward and downward convection when rotating, effectively solving the problem of the accumulation of particulate matter in metallurgical wastewater at the bottom and enhancing the uniformity of mixing wastewater and reagents.

[0026] Preferably, the lower end of the feeding pipe is connected to the inside of the processing barrel, the upper end of the feeding pipe is connected to the feeding hopper, the inner side of the auger shaft extends to the outside of the feeding pipe and is connected to a second bevel gear, the upper end of the drive shaft is connected to a first bevel gear, the first bevel gear and the drive shaft are connected by a ratchet structure to form a one-way transmission structure, the first bevel gear and the second bevel gear are meshed, and a stirring blade is provided below the discharge port of the feeding pipe, and the stirring blade is connected to the drive shaft.

[0027] Using the above technical solution, the auger shaft is linked to the drive shaft through bevel gears, which can realize the delivery of chemicals without the need for an additional drive motor, saving energy and simplifying the structure. The auger shaft can effectively break up chemical agglomerates, avoid blockage of the feeding channel, and ensure continuous and stable chemical dosing. The stirring blades below the feeding port can mix the chemicals with the sewage as soon as they are added, preventing incomplete reaction caused by chemical agglomeration. It is especially suitable for chemical and metallurgical wastewater with high requirements for chemical dosing accuracy and mixing efficiency, reducing chemical waste and improving the stability of treatment effect. The ratchet structure design can stop the feeding when the stirring structure rotates in the opposite direction.

[0028] Preferably, a backflush nozzle is connected to the lower end of the filter bucket, and a threaded screw passes through the lower end of the backflush nozzle. The threaded screw is threadedly engaged with the backflush nozzle, and both ends of the threaded screw are rotatably connected to the inner wall of the treatment box. A third motor is installed outside the treatment box, and the shaft end of the third motor is connected to the threaded screw. A water immersion sensor is installed in the middle of the filter bucket, and the water immersion sensor array is distributed and the water immersion sensor is set higher than the baffle.

[0029] Using the above technical solution, the third motor drives the threaded screw to move the backwash nozzle, which can achieve a thorough rinsing of the filter bucket, completely remove stubborn residues in the filter pores, solve the problem of incomplete rinsing by traditional fixed nozzles, and restore filtration efficiency. The water immersion sensor array can monitor the sewage level in the filter bucket in real time. When the level is higher than the baffle, backwashing is automatically triggered, eliminating the need for manual judgment of the backwashing timing. This avoids the filter material from being scrapped due to blockage or the waste of water resources due to excessive backwashing. It is suitable for the automated operation and maintenance needs of chemical and metallurgical wastewater with complex impurities, and improves the operational stability of the device.

[0030] Compared with existing technologies, the beneficial effects of this invention are as follows: This multi-stage filtration wastewater treatment device optimizes the efficiency of primary filtration impurity treatment, solves the pain points of frequent clogging and cumbersome cleaning in traditional devices. Compared with existing primary filtration devices that mostly use a single filter screen and are prone to impurity accumulation and clogging, this invention guides impurity sedimentation through the "V"-shaped bottom design of the primary filter box, and uses multi-rectangular space layered interception in the filter bucket. Combined with the inverted "V"-shaped guide plate for uniform water distribution, it significantly reduces the probability of clogging by slag fragments and flocculent residues in wastewater. At the same time, the baffle controlled synchronously by the transmission rod and the "L"-shaped transmission frame guide structure realize automatic impurity dispensing. Combined with the "V"-shaped discharge guide plate and the snap-fit ​​collection bucket, impurities can be quickly cleaned without disassembling the pipeline, avoiding the processing interruption caused by the disassembly and cleaning of traditional devices. It is suitable for the continuous treatment of high-impurity wastewater, and the primary filtration efficiency is significantly improved compared with existing technologies.

[0031] 1. The auger shaft linked to the drive shaft breaks up the agglomerate of the reagents, and the stirring blades below the feed inlet achieve real-time mixing of the reagents, avoiding waste caused by the agglomeration of metallurgical heavy metal scavengers and chemical oxidants; at the same time, the bottom plate adapts to the inclined stirring plate on the inner wall of the treatment tank to form vertical convection, solving the problems of metal particle sedimentation and organic pollutant agglomeration, and improving the pollutant removal rate; in addition, the dual treatment tanks controlled by the solenoid valve operate alternately, so that continuous treatment can be carried out without stopping the machine to switch.

[0032] 2. The third motor drives the threaded screw to move the backwash nozzle, which thoroughly removes iron oxide rust and organic polymer residues from the filter holes. With the help of the water immersion sensor, the backwash is automatically triggered, which can avoid the problem of filtration efficiency being affected by clogging. It can also use high-pressure water flow to perform backwashing without stopping the machine, which improves the convenience of clogging treatment. At the same time, the filter bucket is divided into zones for detection, which can more accurately determine the clogging situation. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0034] Figure 2 This is a schematic diagram of the overall structure of the invention from another perspective;

[0035] Figure 3 This is a schematic cross-sectional view of the processing box of the present invention;

[0036] Figure 4 This is a schematic cross-sectional view of the primary filter box of the present invention;

[0037] Figure 5 This is a schematic diagram of the guide rod and guide plate structure of the present invention;

[0038] Figure 6 This is a schematic diagram of the transmission rod and baffle structure of the present invention;

[0039] Figure 7 This is a schematic diagram of the filter bucket and through-hole structure of the present invention;

[0040] Figure 8 This is a schematic cross-sectional view of the processing barrel of the present invention;

[0041] Figure 9 This is a schematic diagram of the feed tube and auger shaft structure of the present invention;

[0042] Figure 10 This is a schematic diagram of the drive shaft and stirring blade structure of the present invention;

[0043] Figure 11 This is a schematic diagram of the structure of Embodiment 2 of the present invention;

[0044] Figure 12 This is a schematic diagram of the water immersion sensor and filter bucket structure of the present invention.

[0045] In the diagram: 1. Processing tank; 2. Primary filter tank; 3. Inlet pipe; 4. Drain outlet; 5. Filter hopper; 6. Through hole; 7. Transmission rod; 8. Baffle; 9. Transmission frame; 10. Guide rod; 11. Guide plate; 12. First motor; 13. Transmission disc; 14. Guide shaft; 15. Discharge guide plate; 16. Collection hopper; 17. Processing tank; 18. Water pump; 19. Flow guide pipe; 20. Flow guide ring; 21. Outlet pipe; 22. Transmission shaft; 23. Base plate; 24. Stirring plate; 25. Second motor; 26. First bevel gear; 27. Discharge pipe; 28. Discharge hopper; 29. ​​Screw shaft; 30. Second bevel gear; 31. Stirring blade; 32. Filter tank; 33. Backflush nozzle; 34. Threaded screw; 35. Third motor; 36. Water immersion sensor. Detailed Implementation

[0046] 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.

[0047] Example 1, please refer to Figure 1-10This invention provides a technical solution: a multi-stage filtration wastewater treatment device, comprising a treatment tank 1 and two sets of treatment buckets 17 arranged on the side. A water pump 18 is installed between the treatment tank 1 and the treatment buckets 17. A primary filter box 2 is fixed to the upper end of the treatment tank 1, and an inlet pipe 3 is connected to the upper end of the primary filter box 2. The primary filter box 2 has openings at both ends, and discharge holes are opened at corresponding positions on both sides of the treatment tank 1 where they connect to the primary filter box 2. A sealing plate is installed outside the discharge holes, and the impurities inside the primary filter box 2 can be cleaned after removing the sealing plate. A filter bucket 5 is connected to the lower end of the primary filter box 2. The primary filter box 2 is fixed to the inner wall of the treatment tank 1. The bottom of the primary filter box 2 has a "V" shape design, and discharge ports 4 are opened at the upper ends of both sides of the primary filter box 2, and the discharge ports 4 are evenly distributed in an array. During wastewater treatment, external wastewater enters the primary filter tank 2 through the inlet pipe 3. Due to the guiding effect of the "V"-shaped structure at the bottom of the primary filter tank 2, the wastewater flow rate is slowed down. Large-diameter impurities settle to the bottom along the "V"-shaped slope under the action of gravity. When the water level in the primary filter tank 2 rises to the height of the drain port 4, the supernatant flows evenly into the lower filter hopper 5 through the drain port 4 for further filtration. The array of drain ports 4 enables the wastewater to flow into the filter hopper 5 in strips, making full use of the multi-rectangular area of ​​the filter hopper 5.

[0048] The filter hopper 5 has through holes 6 on both sides, and a transmission rod 7 runs through the through holes 6. The transmission rod 7 is connected to a baffle 8. The lower end of the filter hopper 5 is connected to a discharge guide plate 15. The lower end of the processing box 1 is equipped with a filter box 32. The upper ends of both sides of the filter hopper 5 are connected to guide plates. The two sets of guide plates are distributed in an inverted "V" shape. The interior of the filter hopper 5 is divided into multiple rectangular spaces. The through holes 6 are designed in an inverted "trapezoidal" shape, and the through holes 6 and the baffle 8 are matched in shape. The baffle 8 and the through holes 6 form a sealing design. Collection hoppers 16 are fitted on both sides of the treatment box 1, extending into the interior of the treatment box 1. Collection hoppers 16 are fitted with discharge guide plates 15. After the wastewater enters the filter hopper 5 through the primary filter box 2, the inverted "V"-shaped guide plates distribute the wastewater to each group of rectangular spaces, where large-diameter impurities are intercepted. When the impurities accumulate to a certain amount, the transmission rod 7 drives the baffle 8 to move outward, causing the impurities to move synchronously. After the baffle moves, the through hole 6 opens, and the impurities fall into the collection hopper 16 through the "V"-shaped discharge guide plates 15 under the action of gravity. The filtered wastewater flows into the lower part of the treatment box 1 through the gap at the bottom of the filter hopper 5, and then enters the filter box 32 for fine filtration. The filter box 32 is filled with three layers of filter media from top to bottom: the upper layer is 10-15mm quartz sand, the middle layer is 5-8mm activated carbon, and the lower layer is 20-25mm anthracite.

[0049] The transmission rod 7 is connected to the transmission frame 9 on the side. The rear end of the transmission frame 9 is fixed with a guide plate 11. A guide groove is opened inside the guide plate 11. The rear side of the processing box 1 is connected to the first motor 12. The front end of the first motor 12 is connected to the transmission disc 13. The front end of the transmission disc 13 is connected to the guide shaft 14. The guide shaft 14 extends into the guide groove. The baffles 8 are evenly distributed outside the transmission rod 7. The transmission frame 9 is designed in an "L" shape. The rear end of the transmission frame 9 passes through the guide rod 10. The two ends of the guide rod 10 are fixed to the inner wall of the processing box 1. The first motor 12 is fixed to the outer wall of the processing box 1. A partition is set on the rear side of the processing box 1. The front shaft end of the first motor 12 extends into the partition and connects to the transmission disc 13. The guide shaft 14 is connected to the edge of the transmission disc 13. The guide shaft 14 slides in the guide groove. The lower end of the filter hopper 5 is connected to the discharge guide plate 15. The discharge guide plate 15 is distributed in a "V" shape. When it is necessary to clean the impurities inside the filter hopper 5, the first motor 12 starts and drives the transmission disc 13 to rotate. The guide shaft 14 slides along the guide groove of the guide plate 11, driving the guide plate 11 and the transmission frame 9 to move back and forth along the guide rod 10, thereby driving the transmission rod 7 and the baffle 8 to move synchronously. When the baffle 8 is in contact with the through hole 6 of the filter hopper 5, sealed filtration is achieved. When the baffle 8 moves outward with the transmission rod 7, the through hole 6 opens. When the baffle 8 moves horizontally, it displaces the impurities remaining at the top of the filter hopper 5. The intercepted impurities slide into the collection hopper 16 along the "eight"-shaped discharge guide plate 15. The intermittent operation mode can be set through the PLC control system to adapt to continuous processing requirements.

[0050] The inlet end of the water pump 18 is connected to the bottom of the treatment tank 1, the outlet end of the water pump 18 is connected to the guide pipe 19, the end of the guide pipe 19 is connected to the solenoid valve, the inside of the treatment tank 17 is equipped with a guide ring 20, the inner wall of the guide ring 20 is connected to the outlet pipe 21, the outlet pipe 21 is distributed in a ring array, and the solenoid valve is connected to the guide ring 20. After the wastewater in treatment tank 1 is treated, the treated wastewater flows into the bottom of treatment tank 1. The PLC system starts the water pump 18 to transport the treated wastewater to treatment tank 17 through the guide pipe 19. The two sets of treatment tanks 17 work alternately. One set is opened and the other is closed by the solenoid valve to ensure that the wastewater has a suitable treatment time. The alternating operation can realize the continuous treatment of wastewater and maintain the treatment efficiency. After the wastewater flows into the guide ring 20 through the solenoid valve, it flows out through the array of outlet pipes 21. The outlet pipes 21 set in the array ensure uniform liquid inflow from multiple angles. At the same time, the outlet pipes 21 are set above the treatment tank 17. When the liquid flows out of the outlet pipes 21, it can generate turbulence impact on the falling agent and improve the mixing efficiency of the agent and wastewater.

[0051] A drive shaft 22 is installed inside the processing tank 17. The upper end of the drive shaft 22 is connected to a second motor 25, and the lower end of the drive shaft 22 is connected to a base plate 23. The upper end of the base plate 23 is connected to a stirring plate 24. A discharge pipe 27 is installed at the upper end of the processing tank 17, and an auger shaft 29 is installed inside the discharge pipe 27. The base plate 23 is adapted to the inner wall size of the processing tank 17. The outer side of the stirring plate 24 is designed with a slope, and the stirring plates 24 are arranged in a ring array with the center point of the base plate 23 as the axis. The lower end of the discharge pipe 27 is connected to the processing tank. 17 is internally connected. The upper end of the feeding pipe 27 is connected to the feeding hopper 28. The inner side of the auger shaft 29 extends to the outside of the feeding pipe 27 and is connected to the second bevel gear 30. The upper end of the drive shaft 22 is connected to the first bevel gear 26. The first bevel gear 26 and the drive shaft 22 are connected by a ratchet structure to form a one-way transmission structure. The first bevel gear 26 and the second bevel gear 30 are meshed. A stirring blade 31 is provided below the discharge port of the feeding pipe 27 and is connected to the drive shaft 22. When liquid is fed into treatment tank 17, the PLC system controls the second motor 25 to rotate forward: the transmission shaft 22 drives the bottom plate 23 and the stirring plate 24 to rotate, and the inclined surface of the stirring plate 24 pushes the sewage to form an upward and downward convection. At the same time, the first bevel gear 26 drives the second bevel gear 30 to rotate through the ratchet structure, and the auger shaft 29 uniformly conveys the agent in the feed hopper 28 to the discharge port of the feed pipe 27. The stirring blades 31 below quickly disperse the agent. When the liquid feeding is completed, the second motor 25 reverses, the ratchet structure slips, the first bevel gear 26 stops driving, and the auger shaft 29 stops feeding to avoid excessive agent input. After the reaction in treatment tank 17 is completed, the motor stops, and the other treatment tank 17 repeats the above process to achieve efficient treatment by alternating between the two tanks, which is suitable for the continuous production needs of the chemical and metallurgical industries. During the chemical feeding process, the stirring blades 31 come into contact with the liquid and rotate on the liquid surface, which can quickly mix the chemical and sewage, prevent the powdered chemical from floating on the sewage surface, improve the mixing efficiency, and at the same time, the rotating stirring blades 31 can mix with the fed chemical, maintain the uniformity of the chemical feeding, and avoid single-point feeding.

[0052] Example 2, please refer to Figure 11-12The present invention provides a technical solution: a backflush nozzle 33 is connected to the lower end of the filter hopper 5, the backflush nozzle 33 is slidably connected to the inner wall of the discharge guide plate 15, the lower end of the backflush nozzle 33 passes through a threaded screw 34, the threaded screw 34 is threadedly engaged with the backflush nozzle 33, the two ends of the threaded screw 34 are rotatably connected to the inner wall of the processing box 1, a third motor 35 is installed outside the processing box 1, the shaft end of the third motor 35 is connected to the threaded screw 34, a water immersion sensor 36 is installed in the middle of the filter hopper 5, the water immersion sensors 36 are arrayed, and the water immersion sensors 36 are set higher than the baffle 8. When the filter hopper 5 becomes clogged due to the accumulation of metallurgical slag or the adhesion of chemical residues, sewage gradually accumulates inside the filter hopper. The liquid level rises to the installation height of the water immersion sensor 36, and the sensor outputs a signal to the PLC, starting the third motor 35. The third motor 35 drives the threaded screw 34 to rotate. Corrugated hoses are fitted at both ends of the threaded screw 34 to avoid direct contact with sewage and corrosion. The backwash nozzle 33 moves along the screw from one end of the filter hopper to below the clogged area. The spray nozzle of the backwash nozzle 33 sprays high-pressure water to remove the impurities remaining in the filter hopper 5. The backwash nozzle 33 is supplied with liquid from the outside and connected through the corrugated pipe. The backwash pressure is 0.6-0.8 MPa. The filter hopper 5 is divided into multiple rectangular areas. With the help of the array of water immersion sensors 36, multiple areas can be detected independently, improving detection accuracy. The water immersion sensors 36 are covered with a protective tube that is tilted downwards to prevent the water immersion sensors 36 from misjudging due to sewage flowing from top to bottom. Sewage can only flow in from the opening of the protective tube after the liquid level rises and completely submerges the water immersion sensors 36, causing the water immersion sensors 36 to issue a blockage warning.

[0053] The contents not described in detail in this specification are prior art known to those skilled in the art. Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-stage filtration wastewater treatment device, comprising a treatment tank (1) and two sets of treatment barrels (17) arranged on the side, wherein a water pump (18) is installed between the treatment tank (1) and the treatment barrels (17), characterized in that: The processing box (1) is fixed with a primary filter box (2) at the upper end. The primary filter box (2) is connected to an inlet pipe (3) at the upper end. The primary filter box (2) is connected to a filter bucket (5) at the lower end. The filter bucket (5) has through holes (6) on both sides. A transmission rod (7) passes through the through holes (6). The transmission rod (7) is connected to a baffle (8). The filter bucket (5) is connected to a discharge guide plate (15) at the lower end. The processing box (1) is equipped with a filter box (32) at the lower end. The transmission rod (7) is connected to the transmission frame (9) on the side. The transmission frame (9) is fixed to the guide plate (11) at the rear end. The guide plate (11) has a guide groove inside. The processing box (1) is connected to the first motor (12) at the rear. The first motor (12) is connected to the transmission disc (13) at the front end. The transmission disc (13) is connected to the guide shaft (14) at the front end. The guide shaft (14) extends into the guide groove. The processing tank (17) is equipped with a drive shaft (22), the upper end of which is connected to a second motor (25), the lower end of which is connected to a base plate (23), the upper end of which is connected to a stirring plate (24), and a discharge pipe (27) is installed on the upper end of the processing tank (17), and an auger shaft (29) is installed inside the discharge pipe (27).

2. The wastewater treatment device with multi-stage filtration according to claim 1, characterized in that: The primary filter box (2) is fixed to the inner wall of the treatment box (1). The bottom of the primary filter box (2) is designed in a "V" shape. Drainage ports (4) are opened on the upper ends of both sides of the primary filter box (2). The drainage ports (4) are distributed in an equidistant array.

3. The wastewater treatment device with multi-stage filtration according to claim 1, characterized in that: The filter bucket (5) has guide plates connected to the upper ends of both sides. The two sets of guide plates are distributed in an inverted "V" shape. The filter bucket (5) is divided into multiple rectangular spaces. The through hole (6) is designed in an inverted "trapezoidal" shape. The through hole (6) matches the shape of the baffle (8). The baffle (8) and the through hole (6) form a sealing design.

4. The multi-stage filtration wastewater treatment device according to claim 3, characterized in that: The baffles (8) are distributed in an equidistant array outside the transmission rod (7). The transmission frame (9) is designed in an "L" shape. The rear end of the transmission frame (9) passes through the guide rod (10). The two ends of the guide rod (10) are fixed to the inner wall of the processing box (1).

5. The multi-stage filtration wastewater treatment device according to claim 4, characterized in that: The first motor (12) is fixed to the outer wall of the processing box (1). A partition is provided on the rear side of the processing box (1). The front shaft end of the first motor (12) extends into the partition and is connected to the transmission disk (13). The guide shaft (14) is connected to the edge of the transmission disk (13). The guide shaft (14) is slidably engaged with the guide groove.

6. The wastewater treatment device with multi-stage filtration according to claim 1, characterized in that: The filter bucket (5) is connected to the discharge guide plate (15) at its lower end. The discharge guide plate (15) is distributed in a figure-eight shape. The processing box (1) is fitted with a collection bucket (16) on both sides. The collection bucket (16) extends into the processing box (1). The collection bucket (16) is fitted with the discharge guide plate (15).

7. The multi-stage filtration wastewater treatment device according to claim 1, characterized in that: The inlet end of the water pump (18) is connected to the bottom of the treatment tank (1), the outlet end of the water pump (18) is connected to the guide pipe (19), the end of the guide pipe (19) is connected to the solenoid valve, the inside of the treatment tank (17) is equipped with a guide ring (20), the inner wall of the guide ring (20) is connected to the outlet pipe (21), the outlet pipe (21) is distributed in a ring array, and the solenoid valve is connected to the guide ring (20).

8. A multi-stage filtration wastewater treatment device according to claim 7, characterized in that: The bottom plate (23) is adapted to the inner wall size of the processing tank (17), the outer side of the stirring plate (24) is designed with a slope, and the stirring plates (24) are arranged in a ring array with the center point of the bottom plate (23) as the axis.

9. A multi-stage filtration wastewater treatment device according to claim 8, characterized in that: The lower end of the feeding pipe (27) is connected to the inside of the processing barrel (17), and the upper end of the feeding pipe (27) is connected to the feeding hopper (28). The inner side of the auger shaft (29) extends to the outside of the feeding pipe (27) and is connected to a second bevel gear (30). The upper end of the transmission shaft (22) is connected to a first bevel gear (26). The first bevel gear (26) and the transmission shaft (22) are connected by a ratchet structure to form a one-way transmission structure. The first bevel gear (26) and the second bevel gear (30) are meshed. A stirring blade (31) is provided below the discharge port of the feeding pipe (27), and the stirring blade (31) is connected to the transmission shaft (22).

10. A multi-stage filtration wastewater treatment device according to claim 1, characterized in that: The filter bucket (5) is connected to a backflush nozzle (33) at its lower end. A threaded screw (34) passes through the lower end of the backflush nozzle (33). The threaded screw (34) is threadedly engaged with the backflush nozzle (33). Both ends of the threaded screw (34) are rotatably connected to the inner wall of the treatment box (1). A third motor (35) is installed outside the treatment box (1). The shaft end of the third motor (35) is connected to the threaded screw (34). A water immersion sensor (36) is installed in the middle of the filter bucket (5). The water immersion sensors (36) are arranged in an array and are positioned higher than the baffle (8).

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