An oil-containing sewage environmental protection efficient treatment device for preventing water pollution

Abstract

The application discloses an oil-containing sewage environment-friendly and efficient treatment device for preventing water pollution, and relates to the technical field of sewage treatment. The device comprises a treatment tank and a pretreatment box, the pretreatment box is installed on the treatment tank, the sewage pretreatment mechanism comprises an aerator installed on the pretreatment box, a layered plate installed on the pretreatment box, a water inlet pipe installed on the pretreatment box, a pure water outlet pipe installed on the pretreatment box, an oil stain concentration box installed on the pretreatment box, a concentration conveying box installed on the pure water outlet pipe, and a stress frame reciprocally moves up and down to drive the self-cleaning plate to move; at this time, the self-cleaning plate moves to scrape the surface of the conveying plate, so that the excessive attachment of grease or large-particle impurities on the surface of the conveying plate is avoided, and the normal operation of the conveying plate is ensured.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, specifically to an environmentally friendly and efficient treatment device for oily wastewater that prevents water pollution. Background Technology

[0002] Oily wastewater, in the professional field, generally refers to wastewater containing a certain concentration of oily substances (including mineral oil, animal and vegetable oil, or synthetic oil) as well as other suspended solids, dissolved organic matter, or chemical additives. Patent publication number CN207468366U includes a water collection tank, a tank-within-a-tank, a horizontal oil-water separator, a dosing device, a flocculation reactor, a dissolved air flotation (DAF) machine, an oily waste collection container, and a sludge tank. The water collection tank, tank-within-a-tank, horizontal oil-water separator, flocculation reactor, and DAF machine are connected sequentially. The oily wastewater to be treated is first collected in the water collection tank, and then sequentially passes through the tank-within-a-tank, horizontal oil-water separator, flocculation reactor, and DAF machine before being discharged. This patent has a wide range of applications and high treatment efficiency.

[0003] The aforementioned patent describes a process involving a tank-within-a-tank system, a horizontal oil-water separator, a flocculation reactor, and a dissolved air flotation unit before discharge, achieving wide applicability and high treatment efficiency. However, this process lacks a dedicated pretreatment stage for floating oil at the inlet. Oily wastewater often carries a large amount of free floating oil. If it directly enters the subsequent treatment system, the high concentration of floating oil will rapidly increase the processing load of the core treatment unit, especially causing continuous impact on the fine filtration and separation components, easily leading to overload problems. This, in turn, shortens the equipment operating cycle, increases maintenance frequency, and may affect the stability of the final effluent quality. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides an environmentally friendly and efficient treatment device for oily wastewater that prevents water pollution, thus solving the problems mentioned in the background section.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an environmentally friendly and efficient treatment device for oily wastewater to prevent water pollution, comprising a treatment tank and a pretreatment tank, wherein the pretreatment tank is installed on the treatment tank; the environmentally friendly and efficient treatment device for oily wastewater to prevent water pollution further includes: Aerator; A wastewater treatment device for assisting wastewater treatment includes a wastewater pretreatment mechanism installed on the pretreatment tank and a pretreatment maintenance mechanism installed on the wastewater pretreatment mechanism. The wastewater pretreatment unit is used to pre-treat wastewater to reduce the pressure on subsequent treatment. The pretreatment maintenance mechanism is used to maintain the pretreatment components so that they can operate for a long time. The wastewater pretreatment mechanism includes an aerator installed on the pretreatment tank, a layered plate installed on the pretreatment tank, an inlet pipe installed on the pretreatment tank, a pure water outlet pipe installed on the pretreatment tank, an oil collection tank installed on the pretreatment tank, a centralized conveying tank installed on the pure water outlet pipe, a rotating drum installed on the pretreatment tank, and a conveying plate installed on the rotating drum.

[0006] The wastewater pretreatment mechanism includes a contact wheel mounted on the conveyor plate, a cam mounted on the conveyor plate, a force-bearing frame mounted on the conveyor plate, and a self-cleaning plate mounted on the force-bearing frame.

[0007] The centralized conveying box is connected to the processing tank, the layered plate is set with an inclined angle, and a transmission belt is connected between the two rotating drums.

[0008] The surface of the conveyor plate is provided with drainage holes, and the self-cleaning plate is used to unclog the surface of the drainage holes.

[0009] The auxiliary wastewater treatment device also includes a deep filtration device installed on the treatment tank. The deep filtration device includes an activated carbon filter mechanism installed on the treatment tank and an impurity interception and treatment mechanism installed on the activated carbon filter mechanism. The deep filtration device is used to perform deep filtration on pretreated oily wastewater. The activated carbon filtration mechanism is used for deep filtration of oily wastewater using activated carbon. The impurity interception and treatment mechanism is used to intercept and treat impurities whose particle size is larger than that of activated carbon filter pores.

[0010] The activated carbon filtration mechanism includes a rotating shaft I mounted on the treatment tank, a stratification disc mounted on the rotating shaft I, a water filter screen plate mounted on the stratification disc, an activated carbon cylinder mounted on the stratification disc, a maintenance plate mounted on the rotating shaft I, a cleaning roller I mounted on the maintenance plate, and a contact wheel II mounted on the cleaning roller I. The first rotating shaft is connected to the output end of the drive motor at the end away from the pretreatment box, the second contact wheel is in contact with the activated carbon cylinder, and the surface of the first cleaning roller is provided with bristles.

[0011] The impurity interception and treatment mechanism includes a limiting plate installed on the activated carbon cylinder, a water filter plate installed on the limiting plate, and a pusher plate installed on the cleaning roller. The pusher plate is connected to the activated carbon cylinder, and the surface of the filter plate is provided with a filter groove.

[0012] The auxiliary sewage treatment device also includes a large particle interception device installed on the rotating shaft, the interception mechanism, and an anti-clogging mechanism installed on the interception mechanism; The large particle interception device is used to intercept and adsorb large particle impurities. The interception mechanism is used to intercept impurities and scrape the inner wall of the processing tank; The anti-clogging mechanism is used to prevent the surface of the filter screen from becoming clogged, thereby affecting the amount of water entering the filter.

[0013] The interception mechanism includes a gear one mounted on the rotating shaft one, a gear set mounted on the layering disk one, a gear rod mounted on the processing tank one, a rotating frame mounted on the gear rod one, and an interception plate mounted on the rotating frame one; The gear rod meshes with the gear set, the first gear meshes with the gear set, and the surface material of the interceptor plate is set as a particle trapping net.

[0014] The anti-clogging mechanism includes a second cleaning roller mounted on the rotating frame, a third contact wheel mounted on the second cleaning roller, and a scraper mounted on the rotating frame; The cleaning roller 2 has bristles on its surface, the contact wheel 3 contacts the treatment tank, the scraper has an inclined surface on its surface, and the scraper contacts the layering disc.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In this invention, the oil on the water surface is scraped by the rotation of the conveyor plate and transported towards the oil collection box. The oil then enters the oil collection box until it is discharged. At this time, the oil and water of the oily wastewater are initially separated, which reduces the pressure on subsequent wastewater treatment. The cam rotates and contacts and squeezes the force frame to move up and down. At the same time, the up and down movement of the force frame drives the self-cleaning plate to move. At this time, the movement of the self-cleaning plate scrapes the surface of the conveyor plate to prevent excessive adhesion of grease or large particulate impurities to its surface, thereby affecting its normal operation.

[0016] 2. In this invention, the activated carbon flows downward through the activated carbon cylinder until it enters the bottom of the treatment tank. At this point, the pre-treated wastewater undergoes deep filtration through the activated carbon. The rotation of the second contact wheel drives the first cleaning roller to rotate, which in turn drives the bristles to rotate and clean the filter pores on the surface of the activated carbon cylinder to prevent clogging. Furthermore, the rotation of the first cleaning roller as the maintenance plate revolves further improves the cleaning effect on the activated carbon cylinder. This solves the problem of easy clogging of activated carbon filter pores and ensures the stability and permeability of the filtration system during long-term operation. Impurities are pushed into the filter plate by the pusher plate. At this point, the filter plate has a filter groove on its surface to filter out the water from the impurities and collect and stack the impurities. This prevents the impurities from flowing back under the action of the water flow or sticking to the surface of the activated carbon cylinder, thus affecting its filtration effect and efficiency on wastewater.

[0017] 3. In this invention, impurities are pushed into the filter plate by the pusher plate. The filter plate has a filter groove on its surface that filters out the water from the impurities and collects and stacks them, preventing secondary backflow or adhesion to the activated carbon cylinder surface, which would affect the filtration effect and efficiency of the wastewater. The interceptor plate intercepts and adsorbs large particles of wastewater about to enter the activated carbon cylinder for deep filtration, preventing excessive operating pressure on the activated carbon cylinder, which could lead to overload or blockage. It also maintains unobstructed flow within the device. The contact wheel rotates and rotates on the surface of the treatment tank. Simultaneously, the rotation of the contact wheel causes the cleaning roller to rotate, driving the bristles to brush the inner wall of the treatment tank, preventing grease from adhering to it. The scraper rotates to scrape the surface of the filter screen, preventing blockage and subsequent failure of the activated carbon cylinder components, thus preventing the equipment from operating normally. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall internal structure of the present invention; Figure 3 This is a schematic diagram showing the position and structure of the water inlet pipe and the pure water outlet pipe of the present invention; Figure 4 This is a schematic diagram showing the positional structure of the conveyor plate and the first contact wheel of the present invention; Figure 5 For the present invention Figure 4 Enlarged schematic diagram of the structural part of position A in the middle; Figure 6 This is a schematic diagram showing the positional structure of the rotating shaft and the maintenance plate of the present invention; Figure 7 This is a schematic diagram showing the positional structure of the cleaning roller 1 and the contact wheel 2 of the present invention; Figure 8 For the present invention Figure 7 Enlarged schematic diagram of the structural part of B in the middle; Figure 9 This is a schematic diagram showing the positional structure of the cleaning roller 2 and the contact wheel 3 of the present invention.

[0019] The meanings of the labels in the diagram are as follows: 1. Treatment tank; 2. Pretreatment box; 11. Aerator; 12. Layering plate; 13. Inlet pipe; 14. Pure water outlet pipe; 15. Oil collection box; 16. Centralized conveying box; 17. Rotary drum; 18. Conveying plate; 19. Contact wheel one; 110. Cam; 111. Force-bearing frame; 112. Self-cleaning plate; 21. Rotating shaft one; 22. Layering disc; 23. Filter screen plate; 24. Activated carbon cylinder; 25. Maintenance plate; 26. Cleaning roller one; 27. Contact wheel two; 31. Limiting plate; 32. Filter strainer; 33. Pushing plate; 41. Gear one; 42. Gear set; 43. Gear rod; 44. Rotating frame; 45. Interception plate; 51. Cleaning roller two; 52. Contact wheel three; 53. Scraper. Detailed Implementation

[0020] 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.

[0021] Please see Figures 1-5 One embodiment of the present invention is as follows: an environmentally friendly and efficient treatment device for oily wastewater to prevent water pollution includes a treatment tank 1 and a pretreatment tank 2, wherein the pretreatment tank 2 is installed on the treatment tank 1. The environmentally friendly and efficient treatment device for oily wastewater to prevent water pollution further includes: Aerator 11; An auxiliary wastewater treatment device for assisting wastewater treatment includes a wastewater pretreatment mechanism installed on the pretreatment tank 2 and a pretreatment maintenance mechanism installed on the wastewater pretreatment mechanism. Among them, the wastewater pretreatment unit is used to pre-treat wastewater to reduce the pressure on subsequent treatment; The pretreatment maintenance mechanism is used to maintain the pretreatment components so that they can operate for a long time. The wastewater pretreatment mechanism includes an aerator 11 installed on the pretreatment tank 2, a layered plate 12 installed on the pretreatment tank 2, an inlet pipe 13 installed on the pretreatment tank 2, a pure water outlet pipe 14 installed on the pretreatment tank 2, an oil and grease collection tank 15 installed on the pretreatment tank 2, a centralized conveying tank 16 installed on the pure water outlet pipe 14, a rotating drum 17 installed on the pretreatment tank 2, and a conveying plate 18 installed on the rotating drum 17.

[0022] The wastewater pretreatment mechanism includes a contact wheel 19 mounted on a conveyor plate 18, a cam 110 mounted on the conveyor plate 18, a force-bearing frame 111 mounted on the conveyor plate 18, and a self-cleaning plate 112 mounted on the force-bearing frame 111.

[0023] The centralized conveying box 16 is connected to the treatment tank 1. The angle of the layer plate 12 is set with an inclination angle, which is used to treat and separate oil and sewage. A transmission belt is connected between the two rotating drums 17.

[0024] The surface of the conveyor plate 18 is provided with drainage holes, which are used to reduce running resistance. The self-cleaning plate 112 is used to unclog the surface of the drainage holes.

[0025] In this embodiment, during operation: The worker connects the oily wastewater pipe to the inlet pipe 13. The aerator 11 is then started, and aeration begins at its output. Inside the pretreatment tank 2, the wastewater separated by the stratification plate 12 is aerated by the aerator 11. The floating oil in the oily wastewater rises rapidly. Then, the oil and water are separated by the stratification plate 12. The oil flows towards the oil collection tank 15, while the water flows downwards through the stratification plate 12. The water is then discharged through the pure water outlet pipe 14 and enters the centralized conveying tank 16 for collection. It then enters the treatment tank 1 for further treatment and is discharged from the treatment tank 1 for transport. Simultaneously, the rotating drum 17 rotates under the action of the drive motor, causing the conveyor plate 18 to rotate. The conveyor plate 18 rotates and moves along the rotation trajectory of the transmission belt. The rotating conveyor plate 18 scrapes the oil on the water surface and transports it towards the oil collection tank 15. The oil then enters the oil collection tank 15 until it is discharged. At this point, the initial separation of oil and water in the oily wastewater is completed, reducing the pressure on subsequent wastewater treatment. As the conveyor plate 18 rotates, it drives the contact wheel 19 to rotate. When the contact wheel 19 contacts the surface of the pretreatment tank 2 under the action of the conveyor plate 18, it rotates on its own axis. At this time, the rotation of the contact wheel 19 drives the cam 110 to rotate. The cam 110 rotates and contacts and squeezes the force frame 111, which moves up and down repeatedly. At the same time, the reciprocating movement of the force frame 111 drives the self-cleaning plate 112 to move. The movement of the self-cleaning plate 112 scrapes the surface of the conveyor plate 18 to prevent excessive adhesion of grease or large particles to its surface, which would affect its normal operation.

[0026] Please see Figures 1-9Based on the above embodiments, in another embodiment of the present invention, the auxiliary sewage treatment device further includes a deep filtration device installed on the treatment tank 1. The deep filtration device includes an activated carbon filtration mechanism installed on the treatment tank 1 and an impurity interception and treatment mechanism installed on the activated carbon filtration mechanism. Among them, the deep filtration device is used for deep filtration of pre-treated oily wastewater; Activated carbon filtration systems are used for deep filtration of oily wastewater using activated carbon. The impurity interception and treatment mechanism is used to intercept and treat impurities whose particle size is larger than that of activated carbon filter pores.

[0027] The activated carbon filtration mechanism includes a rotating shaft 21 mounted on the treatment tank 1, a stratification plate 22 mounted on the rotating shaft 21, a water filter screen 23 mounted on the stratification plate 22, an activated carbon cylinder 24 mounted on the stratification plate 22, a maintenance plate 25 mounted on the rotating shaft 21, a cleaning roller 26 mounted on the maintenance plate 25, and a contact wheel 27 mounted on the cleaning roller 26. Among them, the end of the rotating shaft 21 away from the pretreatment box 2 is connected to the output end of the drive motor, the contact wheel 27 contacts the activated carbon cylinder 24, and the surface of the cleaning roller 26 is provided with bristles, which are used to brush and clean the surface of the activated carbon cylinder 24.

[0028] The impurity interception and treatment mechanism includes a limiting plate 31 installed on the activated carbon cylinder 24, a water filter plate 32 installed on the limiting plate 31, and a pusher plate 33 installed on the cleaning roller 26. The pusher plate 33 is connected to the activated carbon cylinder 24, and the surface of the filter plate 32 is provided with a filter groove, which is used to filter out the accumulated impurities.

[0029] In this embodiment, during operation: Pre-treated wastewater passes through the filter screen 23 on the surface of the stratified plate 22 and enters the activated carbon cylinder 24. Simultaneously, the filter screen 23 initially intercepts larger impurities. Smaller particles then pass through the activated carbon cylinder 24 and flow downwards, passing through it again until reaching the bottom of the treatment tank 1. At this point, the pre-treated wastewater undergoes deep filtration through the activated carbon. The drive motor is then activated, and its output rotates, causing the rotating shaft 21 to rotate. The rotating shaft 21 rotates, causing the maintenance plate 25 to rotate. The maintenance plate 25 rotates, causing the cleaning roller 26 to rotate around the rotating shaft 21. Simultaneously, because the contact wheel 27 contacts the activated carbon cylinder 24, the rotation of the cleaning roller 26 causes the contact wheel 27 to rotate. The contact wheel 27 rotates and, under the influence of the surface of the activated carbon cylinder 24, rotates on its own axis. The cleaning roller 26 rotates, which in turn drives the brush bristles to clean the filter pores on the surface of the activated carbon cylinder 24 to prevent clogging. Furthermore, the rotation of the cleaning roller 26 as the maintenance plate 25 revolves further enhances the cleaning effect on the activated carbon cylinder 24, simultaneously addressing the problem of easy clogging of the activated carbon filter pores and ensuring the long-term stability and permeability of the filtration system. Simultaneously, when the cleaning roller 26 rotates around the shaft 21, it drives the pusher plate 33 to rotate. The pusher plate 33 pushes the intercepted impurities accumulated at the bottom of the outer wall of the activated carbon cylinder 24. Under the action of the pusher plate 33, the impurities are pushed into the water filter plate 32. At this point, the water filter plate 32, with its surface having a water filtration groove, filters out the water from the impurities and collects and stacks them, preventing the impurities from flowing back under the influence of water or sticking to the surface of the activated carbon cylinder 24, thus affecting its filtration effect and efficiency for wastewater.

[0030] Please see Figures 1-9 Based on the above embodiments, in another embodiment of the present invention, the auxiliary sewage treatment device further includes a large particle interception device installed on the rotating shaft 21, an interception mechanism, and an anti-clogging mechanism installed on the interception mechanism. Among them, the large particle interception device is used to intercept and adsorb large particle impurities; The interception mechanism is used to intercept impurities and scrape the inner wall of the treatment tank 1; The anti-clogging mechanism is used to prevent the surface of the filter screen plate 23 from becoming clogged, which would affect the inflow of water for subsequent filtration.

[0031] The interception mechanism includes a gear 41 mounted on a rotating shaft 21, a gear set 42 mounted on a layering plate 22, a gear rod 43 mounted on a processing tank 1, a rotating frame 44 mounted on the gear rod 43, and an interception plate 45 mounted on the rotating frame 44. Among them, gear rod 43 meshes with gear set 42, gear 41 meshes with gear set 42, and the surface material of interceptor plate 45 is set as particle capture net, which is used to intercept impurities and foreign objects.

[0032] The anti-clogging mechanism includes a second cleaning roller 51 mounted on the rotating frame 44, a third contact wheel 52 mounted on the second cleaning roller 51, and a scraper 53 mounted on the rotating frame 44; Among them, the surface of the cleaning roller 51 is provided with bristles, the contact wheel 52 is in contact with the treatment tank 1, the surface of the scraper 53 is set with an inclined surface, the inclined surface is used to improve the scraping and anti-clogging effect on the surface of the filter screen plate 23, and the scraper 53 is in contact with the layering disc 22.

[0033] In this embodiment, when the rotating shaft 21 rotates under the action of the drive motor, the rotation of the rotating shaft 21 drives the gear 41 to rotate. Because the rotating shaft 21 meshes with the gear set 42, the rotation of the gear set 42 drives the gear set 42 to rotate. Since the gear set 42 has a gear ratio combination of a smaller upper gear and a larger lower gear, when the gear set 42 meshes with the gear rod 43, the rotation of the gear set 42 drives the gear rod 43 to rotate. Through the gear ratio, the gear rod 43 maintains a low speed and high torque operation, avoiding the situation where the speed of the activated carbon cylinder 24 cleaning component is matched with the speed, which would lead to excessive speed and the formation of water vortex or failure to effectively intercept and adsorb impurities and foreign objects. This ensures the effective separation of impurities from water, reduces the energy consumption and mechanical wear of the equipment, and extends its service life. At the same time, the rotation of the gear rod 43 drives the rotating frame 44 to rotate, and the rotation of the rotating frame 44 drives the interception plate 45 to rotate. The interception plate 45 then... Wastewater entering the activated carbon cylinder 24 for deep filtration undergoes large particle interception and adsorption treatment to prevent excessive operating pressure on the activated carbon cylinder 24, which could lead to overload or blockage. This also maintains unobstructed flow within the device. Simultaneously, the rotating frame 44 rotates, causing the second cleaning roller 51 to rotate around the gear rod 43. The rotation of the second cleaning roller 51 drives the third contact wheel 52 to rotate. Since the third contact wheel 52 is in contact with the treatment tank 1, it rotates on its own axis under the influence of the surface of the treatment tank 1. This rotation of the third contact wheel 52 causes the second cleaning roller 51 to rotate, driving the bristles to brush the inner wall of the treatment tank 1, preventing grease from adhering to it. Simultaneously, the rotation of the third contact wheel 52 around the gear rod 43 drives the scraper 53 to rotate, scraping the surface of the filter screen 23 to prevent blockage and subsequent failure of the activated carbon cylinder 24 components, thus preventing the equipment from operating normally.

[0034] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0035] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An environmentally friendly and efficient treatment device for oily wastewater to prevent water pollution, comprising a treatment tank (1) and a pretreatment box (2), wherein the pretreatment box (2) is installed on the treatment tank (1), characterized in that, The environmentally friendly and efficient wastewater treatment device for preventing water pollution also includes: Aerator (11); A wastewater treatment device for assisting wastewater treatment includes a wastewater pretreatment mechanism installed on the pretreatment tank (2) and a pretreatment maintenance mechanism installed on the wastewater pretreatment mechanism. The wastewater pretreatment unit is used to pre-treat wastewater to reduce the pressure on subsequent treatment. The pretreatment maintenance mechanism is used to maintain the pretreatment components so that they can operate for a long time. The wastewater pretreatment mechanism includes an aerator (11) installed on the pretreatment tank (2), a layered plate (12) installed on the pretreatment tank (2), an inlet pipe (13) installed on the pretreatment tank (2), a pure water outlet pipe (14) installed on the pretreatment tank (2), an oil pollution collection tank (15) installed on the pretreatment tank (2), a centralized conveying tank (16) installed on the pure water outlet pipe (14), a rotating drum (17) installed on the pretreatment tank (2), and a conveying plate (18) installed on the rotating drum (17).

2. The environmentally friendly and efficient wastewater treatment device for preventing water pollution according to claim 1, characterized in that: The wastewater pretreatment mechanism includes a contact wheel (19) mounted on the conveyor plate (18), a cam (110) mounted on the conveyor plate (18), a force-bearing frame (111) mounted on the conveyor plate (18), and a self-cleaning plate (112) mounted on the force-bearing frame (111).

3. The environmentally friendly and efficient wastewater treatment device for preventing water pollution according to claim 2, characterized in that: The centralized conveying box (16) is connected to the processing tank (1), the angle of the layered plate (12) is set with an inclination angle, and a transmission belt is connected between the two rotating drums (17).

4. The environmentally friendly and efficient wastewater treatment device for preventing water pollution according to claim 3, characterized in that: The surface of the conveying plate (18) is provided with drainage holes, and the self-cleaning plate (112) is used to unclog the surface of the drainage holes.

5. The environmentally friendly and efficient wastewater treatment device for preventing water pollution according to claim 4, characterized in that: The auxiliary sewage treatment device also includes a deep filtration device installed on the treatment tank (1), the deep filtration device including an activated carbon filtration mechanism installed on the treatment tank (1) and an impurity interception and treatment mechanism installed on the activated carbon filtration mechanism; The deep filtration device is used to perform deep filtration on pretreated oily wastewater. The activated carbon filtration mechanism is used for deep filtration of oily wastewater using activated carbon. The impurity interception and treatment mechanism is used to intercept and treat impurities whose particle size is larger than that of activated carbon filter pores.

6. The environmentally friendly and efficient wastewater treatment device for preventing water pollution according to claim 1 or 5, characterized in that: The activated carbon filtration mechanism includes a rotating shaft (21) mounted on the treatment tank (1), a stratification plate (22) mounted on the rotating shaft (21), a water filter screen (23) mounted on the stratification plate (22), an activated carbon cylinder (24) mounted on the stratification plate (22), a maintenance plate (25) mounted on the rotating shaft (21), a cleaning roller (26) mounted on the maintenance plate (25), and a contact wheel (27) mounted on the cleaning roller (26). The first rotating shaft (21) is connected to the output end of the drive motor at one end away from the pretreatment box (2), the second contact wheel (27) is in contact with the activated carbon cylinder (24), and the surface of the first cleaning roller (26) is provided with bristles.

7. The environmentally friendly and efficient wastewater treatment device for preventing water pollution according to claim 6, characterized in that: The impurity interception and treatment mechanism includes a limiting plate (31) installed on the activated carbon cylinder (24), a water filter plate (32) installed on the limiting plate (31), and a pusher plate (33) installed on the cleaning roller (26). The pusher plate (33) is connected to the activated carbon cylinder (24), and the surface of the filter plate (32) is provided with a filter groove.

8. The environmentally friendly and efficient wastewater treatment device for preventing water pollution according to claim 7, characterized in that: The auxiliary sewage treatment device also includes a large particle interception device installed on the rotating shaft (21), the interception mechanism, and an anti-clogging mechanism installed on the interception mechanism; The large particle interception device is used to intercept and adsorb large particle impurities. The interception mechanism is used to intercept impurities and scrape the inner wall of the processing tank (1); The anti-clogging mechanism is used to prevent the surface of the filter screen plate (23) from becoming clogged, thereby affecting the water intake for subsequent filtration.

9. The environmentally friendly and efficient wastewater treatment device for preventing water pollution according to claim 8, characterized in that: The interception mechanism includes a gear (41) mounted on the rotating shaft (21), a gear set (42) mounted on the layered disk (22), a gear rod (43) mounted on the processing tank (1), a rotating frame (44) mounted on the gear rod (43), and an interception plate (45) mounted on the rotating frame (44). The gear rod (43) meshes with the gear set (42), the first gear (41) meshes with the gear set (42), and the surface material of the interceptor plate (45) is set as a particle trapping net.

10. The environmentally friendly and efficient wastewater treatment device for preventing water pollution according to claim 9, characterized in that: The anti-clogging mechanism includes a second cleaning roller (51) mounted on the rotating frame (44), a third contact wheel (52) mounted on the second cleaning roller (51), and a scraper (53) mounted on the rotating frame (44). The cleaning roller 2 (51) has bristles 2 on its surface, the contact wheel 3 (52) is in contact with the treatment tank (1), the scraper (53) has an inclined surface 1 on its surface, and the scraper (53) is in contact with the layering disc (22).

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