CN117964081A - A preliminary filtration device for sewage purification for river pollution control - Google Patents

Abstract

The present invention relates to the technical field of river sewage treatment, and in particular to a sewage purification preliminary filtering device for river pollution control, comprising a pretreatment box and a stirring barrel, wherein two groups of downpipes are fixedly connected to the bottom surface of the pretreatment box, and the bottom ends of the two groups of downpipes are both provided with the inside of the stirring barrel, a filter plate is fixedly installed near the middle position inside the pretreatment box, and a plurality of groups of filter holes are penetrated through the upper surface of the filter plate, and a pretreatment mechanism for pretreatment of impurities in the sewage is provided inside the pretreatment box and above the filter plate. The pretreatment mechanism provided in the present invention can well crush and smoothly discharge larger impurities in the sewage, and can clean the filter plate at the same time, and can avoid agglomeration of the input flocculant by providing a dispersion mechanism, and can effectively improve the removal effect of smaller impurities in the sewage by coordinating the mixing of the flocculant and the sewage with the stirring shaft and the stirring blade.

Description

A preliminary filtration device for sewage purification for river pollution control

Technical Field

The invention relates to the technical field of river sewage treatment, in particular to a sewage purification preliminary filtering device for river pollution control.

Background technique

River pollution refers to the direct or indirect introduction of substances or energy into the river environment due to human activities, which causes harmful effects such as damage to river biological resources, damage to river water and river environmental quality, and endangerment to human health. It is also a type of water pollution. The degree of pollution changes over time and spreads quickly. The pollution has a great impact, so it is necessary to control river pollution, and the sewage needs to be initially filtered before further purification.

The existing sewage purification preliminary filtration equipment for river pollution control generally filters larger impurities in the river through a filter plate. However, the equipment does not have a good cleaning and impurity removal function, and larger impurities are easy to block the sewage outlet, causing inconvenience. Generally, flocculants are added into the equipment to remove smaller impurities in the river. However, flocculants are very easy to clump, which affects the removal effect of smaller impurities in the river.

Summary of the invention

The purpose of the present invention is to solve the problems in the background technology and to propose a sewage purification preliminary filtering equipment for river pollution control.

In order to achieve the above object, the present invention adopts the following technical solutions:

A preliminary filtration device for sewage purification for river pollution control comprises a pretreatment box and a stirring barrel, wherein two groups of downpipes are fixedly connected to the bottom surface of the pretreatment box, and the bottom ends of the two groups of downpipes are provided with the inside of the stirring barrel, a filter plate is fixedly installed near the middle position inside the pretreatment box, a plurality of groups of filter holes are penetrated through the upper surface of the filter plate, a pretreatment mechanism for pretreatment of impurities in the sewage is arranged inside the pretreatment box and above the filter plate, a slide groove is penetrated through the upper surface of the pretreatment box, a threaded rod is rotatably connected inside the slide groove, a slider is sleeved on the outside of the threaded rod, and the slider is connected with the pretreatment mechanism, a motor 1 is installed on the outer side wall of the pretreatment box, and the output end of the motor 1 is connected to one end of the threaded rod, a dispersion mechanism for dispersing flocculants is arranged inside the stirring barrel, and ramp blocks are fixedly installed on both sides of the bottom end of the pretreatment box;

The pretreatment mechanism includes a connecting plate, which is fixedly installed on the bottom surface of the slider, a scraper is fixedly connected to the bottom end of the connecting plate, both outer side walls of the scraper are fixedly connected to protective shells, connecting plates are fixedly installed on the outer side walls of the scraper near both sides, a cleaning roller is rotatably connected between the two groups of connecting plates, a plurality of groups of cleaning bristles are fixedly connected to the outer wall of the cleaning roller, and the outer side walls of the two groups of connecting plates are movably connected to a connecting shaft 1, and one end of the connecting shaft 1 is connected to one end of the cleaning roller.

In the above-mentioned sewage purification preliminary filtration equipment for river pollution control, a transmission gear is fixedly connected to the outer wall of the connecting shaft, long plates are fixedly installed on both sides of the upper surface of the filter plate, and a plurality of groups of tooth grooves are opened on the upper surface of the long plate, and the plurality of groups of tooth grooves are meshed with the transmission gear.

In the above-mentioned sewage purification preliminary filtration equipment for river pollution control, the inner walls of the two groups of protective shells are rotatably connected with connecting shaft 2, a movable roller is fixedly connected between the two groups of connecting shafts 2, and a plurality of crushing blades are fixedly connected to the outer walls of the movable rollers, and a transmission belt 1 is sleeved between the outside of the connecting shaft 1 and the connecting shaft 2.

In the above-mentioned sewage purification preliminary filtration equipment for river pollution control, the dispersion mechanism includes a stirring shaft and a mounting shell, the stirring shaft is rotatably connected to the top of the mounting shell, the mounting shell is fixedly installed at the top position inside the stirring barrel, a plurality of stirring blades are fixedly connected to the outer wall of the stirring shaft, a second motor is installed on the upper end surface of the stirring barrel, and the output end of the second motor is connected to one end of the stirring shaft.

In the above-mentioned sewage purification preliminary filtration equipment for river pollution control, a bevel gear 1 is fixedly connected to the outer wall of the stirring shaft near the upper end, and a transverse axis 1 and a transverse axis 2 are rotatably connected to the two inner side walls of the mounting shell near the upper and lower ends, one end of the two groups of transverse axis 1 are fixedly connected to the bevel gear 2, and the two groups of bevel gear 2 are meshed with the bevel gear 1, and a transmission belt 2 is sleeved between the outside of the transverse axis 1 and the transverse axis 2.

In the above-mentioned sewage purification preliminary filtration equipment for river pollution control, fixed plates are fixedly installed on both outer side walls of the mounting shell, and two groups of outer side walls of the fixed plates are fixedly connected with transverse plates near the upper and lower ends, and the fixed plate is rotatably connected with movable plate 2 on the side away from the mounting shell, and one end of the transverse axis 2 is fixedly connected to movable plate 2.

In the above-mentioned sewage purification preliminary filtration equipment for river pollution control, a connecting shaft is inserted into the outer wall of the movable plate 2, one end of the connecting shaft is fixedly connected to a movable ring, a vertical shaft is inserted inside the movable ring, both ends of the vertical shaft are rotatably connected to movable plate 1, a movable shaft is rotatably connected between the outer walls of the two groups of horizontal plates, and one end of the two groups of movable plate 1 is respectively fixedly sleeved on the outside of the two groups of movable shafts, and a dispersion plate is fixedly connected to the outer wall of the movable shaft and located between the two groups of movable plates 1.

In the above-mentioned sewage purification preliminary filtration equipment for river pollution control, an opening is penetrated through the outer wall of the pretreatment box, a sewage discharge bin is fixedly connected to the outer wall of the pretreatment box near the edge of the opening, a baffle is movably inserted at the top of the opening, a vertical groove is opened on the outer wall of the pretreatment box near the upper edge of the opening, an electric telescopic rod is installed at the top of the vertical groove, and one end of the electric telescopic rod is fixedly connected to the baffle.

In the above-mentioned preliminary filtration equipment for sewage purification for river pollution control, a bracket is fixedly installed on the outer wall of the mixing barrel, and the bracket is fixedly connected to the pretreatment box at one end away from the mixing barrel, a sewage pipe is fixedly connected to the bottom surface of the mixing barrel, and a valve one is installed on the outer wall of the sewage pipe, a water outlet pipe is fixedly connected to the outer wall of the mixing barrel near the lower position, and a valve two is installed on the outer wall of the water outlet pipe, a feeding pipe is fixedly connected to the outer wall of the mixing barrel near the upper position, and a plurality of groups of legs are fixedly installed on the outer wall of the mixing barrel near the bottom position, and a water inlet pipe is fixedly connected to the upper end surface of the pretreatment box.

Compared with the existing technology, the advantages of this sewage purification preliminary filtration equipment for river pollution control are:

1. The motor 1 and the threaded rod cooperate with the slider to drive the connecting plate and the scraper to move, so as to scrape and push the impurities on the filter plate. The transmission gear cooperates with each group of tooth grooves to drive the transmission gear to rotate, thereby driving the connecting shaft 1 to rotate, so that the cleaning roller rotates, and cooperates with the cleaning hair on it to clean the filter plate. At the same time, under the rotation of the connecting shaft 1, and in cooperation with the transmission belt 1, the connecting shaft 2 can be driven to rotate, and the movable roller can be driven to rotate at the same time. In cooperation with the groups of crushing blades installed thereon, the filtered impurities can be cut and crushed to avoid the impurities from blocking the opening too large and affecting the sewage discharge effect. In cooperation with the continuous push of the scraper, the crushed impurities can be pushed out of the opening and discharged through the sewage discharge bin, so as to realize the cleaning and discharge of the impurities, and at the same time, it can avoid blockage, so that the cleaning and sewage discharge effect is better, and the filter plate can be automatically cleaned while the impurities are cleared;

2. Add flocculant into the mixing barrel through the feeding pipe to remove smaller impurities in the sewage. After adding the flocculant, the sewage and the flocculant can be mixed and stirred by the motor 2 and the stirring shaft, so that the flocculant and the smaller impurities in the sewage are fully mixed. The bevel gear 1, the bevel gear, the horizontal shaft 1 and the transmission belt 2 can drive the horizontal shaft 2 to rotate, so that the one end of the movable plate 2 is driven to rotate, and the two sets of movable plates 1 are driven to swing continuously at one end in cooperation with the connecting shaft and the movable sleeve ring, which can drive the dispersion plate to swing continuously, and the flocculant is continuously impacted and beaten to avoid the agglomeration of the added flocculant, which affects the reaction effect with the smaller impurities in the sewage, thereby further improving the mixing effect of the flocculant and the smaller impurities in the sewage. Through the above operation, the flocculant and the sewage can be fully mixed, and the removal effect of the smaller impurities in the sewage can be effectively improved;

In summary, by setting up the pretreatment mechanism, larger impurities in sewage can be well crushed and discharged smoothly, and the filter plate can be cleaned at the same time. By setting up the dispersion mechanism, the input flocculant can be prevented from agglomerating. The mixing of the flocculant and sewage by the stirring shaft and stirring blades can effectively improve the removal effect of smaller impurities in sewage.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic structural diagram of a sewage purification preliminary filtration device for river pollution control proposed by the present invention;

FIG2 is a cross-sectional view of a pretreatment box of a sewage purification preliminary filtering device for river pollution control proposed by the present invention;

FIG3 is a schematic diagram of the structure of a baffle and a filter plate in a preliminary filtration device for sewage purification for river pollution control proposed by the present invention;

FIG4 is a schematic diagram of a partial structure of a pre-treatment mechanism in a sewage purification preliminary filtration device for river pollution control proposed by the present invention;

FIG5 is a cross-sectional view of a mixing barrel in a sewage purification preliminary filtering device for river pollution control proposed by the present invention;

FIG6 is a schematic structural diagram of a dispersion mechanism in a preliminary filtration device for sewage purification for river pollution control proposed by the present invention;

FIG. 7 is a schematic diagram of the partial structure of a dispersion mechanism in a preliminary filtration device for sewage purification for river pollution control proposed by the present invention.

In the figure: 1. pretreatment box; 2. mixing barrel; 3. outrigger; 4. outlet pipe; 5. sewage pipe; 6. inlet pipe; 7. bracket; 8. slide; 9. threaded rod; 10. slider; 11. connecting plate; 12. scraper; 13. protective shell; 14. ramp block; 15. downpipe; 16. filter plate; 17. sewage bin; 18. connecting plate; 19. cleaning roller; 20. connecting shaft 1; 21. transmission gear; 22. long board; 23. transmission belt 1; 24. connecting shaft 2; 25. movable roller; 26. crushing blade; 27 , opening; 28, baffle; 29, vertical slot; 30, electric telescopic rod; 31, stirring shaft; 32, mounting shell; 33, stirring blade; 34, feeding pipe; 35, bevel gear one; 36, bevel gear two; 37, horizontal axis one; 38, transmission belt two; 39, horizontal axis two; 40, fixed plate; 41, horizontal plate; 42, movable plate one; 43, vertical axis; 44, movable plate two; 45, dispersion plate; 46, movable sleeve; 47, connecting shaft; 48, pretreatment mechanism; 49, dispersion mechanism; 50, movable shaft; 51, cleaning wool.

Detailed ways

The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

1 to 7, a preliminary filtration device for sewage purification for river pollution control includes a pretreatment box 1 and a mixing barrel 2. Two groups of downpipes 15 are fixedly connected to the bottom surface of the pretreatment box 1, and the bottom ends of the two groups of downpipes 15 are provided with the inside of the mixing barrel 2. A filter plate 16 is fixedly installed near the middle position inside the pretreatment box 1. A plurality of groups of filter holes are penetrated on the upper surface of the filter plate 16. A pretreatment mechanism 48 for pretreatment of impurities in sewage is provided inside the pretreatment box 1 and above the filter plate 16. A chute 8 is penetrated on the upper surface of the pretreatment box 1. A threaded rod 9 is rotatably connected inside the chute 8. A slider 10 is sleeved on the outside of the threaded rod 9, and the slider 10 is connected to the pretreatment mechanism 48. A motor is installed on the outer wall of the pretreatment box 1. The output end of the motor is connected to one end of the threaded rod 9, a dispersing mechanism 49 for dispersing the flocculant is arranged inside the stirring barrel 2, ramp blocks 14 are fixedly installed on both sides of the bottom end of the pretreatment box 1, and the pretreatment mechanism 48 includes a connecting plate 11, the connecting plate 11 is fixedly installed on the bottom surface of the slider 10, a scraper 12 is fixedly connected to the bottom end of the connecting plate 11, and a protective shell 13 is fixedly connected to the two outer side walls of the scraper 12. A connecting plate 18 is fixedly installed near the two sides of the outer side wall of the scraper 12, and a cleaning roller 19 is rotatably connected between the two groups of connecting plates 18. A plurality of cleaning hairs 51 are fixedly connected to the outer wall of the cleaning roller 19, and the outer walls of the two groups of connecting plates 18 are movably connected to a connecting shaft 20, and one end of the connecting shaft 20 is connected to one end of the cleaning roller 19.

A transmission gear 21 is fixedly connected to the outer wall of the connecting shaft 20, and long plates 22 are fixedly installed on the upper surface of the filter plate 16 near the front and rear sides. A plurality of groups of tooth grooves are opened on the upper surface of the long plate 22, and the plurality of groups of tooth grooves are meshed with the transmission gear 21. The bottom surface of the scraper 12 is tightly attached to the upper surface of the filter plate 16.

The inner side walls of the two groups of protective shells 13 are rotatably connected with connecting shafts 24, and a movable roller 25 is fixedly connected between the two groups of connecting shafts 24. A plurality of groups of crushing blades 26 are fixedly connected to the outer wall of the movable roller 25. A transmission belt 1 23 is sleeved between the connecting shaft 1 20 and the outside of the connecting shaft 2 24. The movable roller 25 rotates to cooperate with the groups of crushing blades 26 installed thereon, so as to cut and crush the filtered impurities. If the impurities are too large, the opening 27 will be blocked, thereby affecting the sewage discharge effect.

An opening 27 is formed through the outer wall of the pretreatment box 1, and a sewage discharge bin 17 is fixedly connected to the outer wall of the pretreatment box 1 near the edge of the opening 27. A baffle 28 is movably inserted at the top of the opening 27. A vertical groove 29 is formed on the outer wall of the pretreatment box 1 near the upper edge of the opening 27. An electric telescopic rod 30 is installed at the top of the vertical groove 29, and one end of the electric telescopic rod 30 is fixedly connected to the baffle 28. The baffle 28 is driven to move upward by the electric telescopic rod 30 installed in the vertical groove 29, so that the baffle 28 releases the blockage of the opening 27.

When in use, the sewage is passed into the pretreatment box 1 through the water inlet pipe 6, so that the sewage falls through the various groups of filter holes on the filter plate 16, and the larger impurities in the sewage can be filtered out on the upper surface of the filter plate 16. After the filtering is completed, the electric telescopic rod 30 installed in the vertical groove 29 can be used to drive the baffle 28 to move up, so that the baffle 28 releases the blockage of the opening 27, and then the threaded rod 9 is driven to rotate by the motor 1, thereby driving the slider 10 to move along the slide groove 8, driving the connecting plate 11 to move, and then driving the scraper 12 to move along the upper surface of the filter plate 16, so that the impurities on the filter plate 16 can be scraped and moved toward the opening 27. In this process, the two groups of connecting plates 18 follow the movement of the scraper 12, which can drive the transmission gear 21 installed thereon to move, and cooperate with the various groups of gears on the long plate 22. The groove can drive the transmission gear 21 to rotate, thereby driving the connecting shaft 20 to rotate, and then driving the cleaning roller 19 to rotate, and cooperate with the cleaning hair 51 thereon, the filter plate 16 can be cleaned, and at the same time, under the rotation of the connecting shaft 20, and in cooperation with the transmission belt 23, the connecting shaft 24 can be driven to rotate, and then the movable roller 25 can be driven to rotate at the same time, and in cooperation with the groups of crushing blades 26 installed thereon, the filtered impurities can be cut and crushed. If the impurities are too large and block the opening 27, affecting the sewage discharge effect, at this time, with the continuous push of the scraper 12, the crushed impurities can be pushed out of the opening 27 and discharged through the sewage discharge bin 17, so as to realize the cleaning and discharge of the impurities, and at the same time, it can avoid blockage, so that the cleaning and sewage discharge effect is better, and the filter plate 16 can be automatically cleaned while the impurities are cleared.

5-7, the dispersion mechanism 49 includes a stirring shaft 31 and a mounting shell 32. The stirring shaft 31 is rotatably connected to the top of the mounting shell 32. The mounting shell 32 is fixedly mounted at the top of the stirring barrel 2. A plurality of stirring blades 33 are fixedly connected to the outer wall of the stirring shaft 31. A motor 2 is mounted on the upper surface of the stirring barrel 2, and the output end of the motor 2 is connected to one end of the stirring shaft 31. The stirring shaft 31 is driven to rotate by the motor 2, and each group of stirring blades 33 rotates with it, so that the sewage and the flocculant can be mixed and stirred, so that the flocculant and the smaller impurities in the sewage are fully mixed.

A bevel gear 1 35 is fixedly connected to the outer wall of the stirring shaft 31 near the upper end, and a transverse shaft 1 37 and a transverse shaft 2 39 are rotatably connected to the two inner side walls of the mounting shell 32 near the upper and lower ends. One end of the two sets of transverse shafts 1 37 are fixedly connected to a bevel gear 2 36, and the two sets of bevel gears 2 36 are meshed with the bevel gear 1 35. A transmission belt 2 38 is sleeved between the outside of the transverse shaft 1 37 and the transverse shaft 2 39. Fixed plates 40 are fixedly installed on the two outer side walls of the mounting shell 32, and the outer side walls of the two sets of fixed plates 40 are fixedly connected to transverse plates 41 near the upper and lower ends. The fixed plate 40 is rotatably connected to a movable plate 2 44 away from the mounting shell 32, and one end of the transverse shaft 2 39 is fixedly connected to the movable plate 2 44.

A connecting shaft 47 is inserted into the outer wall of the movable plate 2 44, one end of the connecting shaft 47 is fixedly connected to a movable ring 46, a vertical shaft 43 is inserted inside the movable ring 46, both ends of the vertical shaft 43 are rotatably connected to the movable plate 1 42, a movable shaft 50 is rotatably connected between the outer walls of the two groups of horizontal plates 41, and one end of the two groups of movable plates 1 42 are respectively fixedly sleeved on the outside of the two groups of movable shafts 50, the bevel gear 1 35 rotates with the stirring shaft 31, which can drive the two groups of bevel gears 2 36 to rotate, and then drive the horizontal shaft 1 37 to rotate, and cooperate with the transmission belt 2 38 to drive the horizontal shaft 2 39 to rotate.

A dispersion plate 45 is fixedly connected to the outer wall of the movable shaft 50 and is located between the two groups of movable plates 42. One end of the movable plate 44 reciprocates along the connecting shaft 47, which can drive one end of the two groups of movable plates 42 to swing continuously, and the other end cooperates with the movable shaft 50 to drive the dispersion plate 45 to swing continuously, thereby continuously impacting and beating the flocculant to avoid agglomeration of the input flocculant and affect the reaction effect with smaller impurities in the sewage.

A bracket 7 is fixedly installed on the outer wall of the mixing barrel 2, and the bracket 7 is fixedly connected to the pretreatment box 1 at one end away from the mixing barrel 2, a sewage pipe 5 is fixedly connected to the bottom surface of the mixing barrel 2, and a valve 1 is installed on the outer wall of the sewage pipe 5, a water outlet pipe 4 is fixedly connected to the outer wall of the mixing barrel 2 near the lower position, and a valve 2 is installed on the outer wall of the water outlet pipe 4, a feeding pipe 34 is fixedly connected to the outer wall of the mixing barrel 2 near the upper position, and several groups of legs 3 are fixedly installed on the outer wall of the mixing barrel 2 near the bottom position, and a water inlet pipe 6 is fixedly connected to the upper end surface of the pretreatment box 1, the bracket 7 supports and connects the pretreatment box 1 and the mixing barrel 2, and the legs 3 support the mixing barrel 2.

Specifically, the sewage filtered by the pretreatment box 1 can enter the mixing barrel 2 from the two groups of sewer pipes 15 along the two groups of slope blocks 14 under the action of gravity. At this time, flocculant can be added into the mixing barrel 2 through the feeding pipe 34 to react and precipitate with smaller impurities in the sewage, so as to remove smaller impurities in the sewage and improve the purification effect of the sewage. After the flocculant is added, the stirring shaft 31 can be driven to rotate by the motor 2, and each group of stirring blades 33 rotates with it, so that the sewage and the flocculant can be mixed and stirred, so that the flocculant and the smaller impurities in the sewage are fully mixed, and the bevel gear 1 35 rotates with the stirring shaft 31, which can drive the two groups of bevel gears 2 36 to rotate, and then drive the horizontal shaft 1 37 to rotate, and cooperate with the transmission belt 2 38 to drive the horizontal shaft 2 39 to rotate, and then drive one end of the movable plate 2 44 to rotate, so that the other end drives the connecting shaft 47 and the movable sleeve 4 6, so that the movable ring 46 slides reciprocatingly up and down along the outside of the vertical axis 43, and one end of the movable plate 2 44 moves reciprocatingly along the connecting shaft 47, which can drive one end of the two sets of movable plates 1 42 to swing continuously, and the other end cooperates with the movable shaft 50 to drive the dispersion plate 45 to swing continuously, so that the flocculant can be continuously impacted and beaten to avoid the existence of agglomeration of the input flocculant, which affects the reaction effect with smaller impurities in the sewage, thereby further improving the mixing effect of the flocculant and the smaller impurities in the sewage. Through the above operation, the flocculant and the sewage can be fully mixed, and the removal effect of smaller impurities in the sewage can be effectively improved. The precipitate after the flocculant and the sewage react falls to the bottom end of the mixing barrel 2 under the action of gravity. Opening the valve 1 can make the precipitate fall out from the sewage pipe 5 under the action of gravity, and opening the valve can make the sewage after preliminary purification be discharged through the outlet pipe 4.

The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims (9)

1. The utility model provides a river pollution is administered with sewage purification preliminary filtration equipment, includes pretreatment tank (1) and agitator (2), its characterized in that: the sewage treatment device comprises a pretreatment tank (1), wherein two groups of sewer pipes (15) are fixedly connected to the bottom surface of the pretreatment tank (1), two groups of sewer pipes (15) are respectively arranged inside a stirring barrel (2), a filter plate (16) is fixedly installed inside the pretreatment tank (1) close to the middle position, a plurality of groups of filter holes are formed in the upper end surface of the filter plate (16) in a penetrating mode, a pretreatment mechanism (48) for carrying out pretreatment on impurities in sewage is arranged inside the pretreatment tank (1) and above the filter plate (16), a sliding groove (8) is formed in the upper end surface of the pretreatment tank (1) in a penetrating mode, a threaded rod (9) is rotatably connected to the inside of the sliding groove (8), a sliding block (10) is sleeved outside the threaded rod (9), the sliding block (10) is connected with the pretreatment mechanism (48), a motor I is installed on the outer side wall of the pretreatment tank (1), an output end of the motor is connected with one end of the threaded rod (9), and a dispersing mechanism (49) for dispersing flocculating agents is arranged inside the stirring barrel (2), and slope blocks (14) are fixedly installed at the bottom ends of the two sides of the pretreatment tank (1).

The pretreatment mechanism (48) comprises a connecting plate (11), the connecting plate (11) is fixedly arranged at the bottom surface of the sliding block (10), a scraping plate (12) is fixedly connected to the bottom end of the connecting plate (11), a protecting shell (13) is fixedly connected to two outer side walls of the scraping plate (12), connecting plates (18) are fixedly arranged at the positions, close to two sides, of the outer side walls of the scraping plate (12), cleaning rollers (19) are rotatably connected between the connecting plates (18), a plurality of groups of cleaning hairs (51) are fixedly connected to the outer walls of the cleaning rollers (19), a connecting shaft I (20) is movably connected to the outer side walls of the connecting plates (18), and one end of the connecting shaft I (20) is connected with one end of the cleaning rollers (19).

2. The sewage purification preliminary filtration device for river pollution treatment according to claim 1, wherein: the outer wall of the first connecting shaft (20) is fixedly connected with a transmission gear (21), long plates (22) are fixedly installed at two sides of the upper end surface of the filter plate (16), a plurality of groups of tooth grooves are formed in the upper end surface of the long plates (22), and the plurality of groups of tooth grooves are meshed with the transmission gear (21).

3. The sewage purification preliminary filtration device for river pollution treatment according to claim 2, wherein: the two groups of the inner side walls of the protective shell (13) are respectively and rotatably connected with a second connecting shaft (24), a movable roller (25) is fixedly connected between the two groups of the second connecting shafts (24), a plurality of groups of crushing blades (26) are fixedly connected to the outer wall of the movable roller (25), and a first transmission belt (23) is sleeved between the first connecting shaft (20) and the outer part of the second connecting shaft (24).

4. The sewage purification preliminary filtration device for river pollution treatment according to claim 1, wherein: the dispersing mechanism (49) comprises a stirring shaft (31) and a mounting shell (32), the stirring shaft (31) is rotationally connected to the top end inside the mounting shell (32), the mounting shell (32) is fixedly mounted at the top end position inside the stirring barrel (2), a plurality of stirring blades (33) are fixedly connected to the outer wall of the stirring shaft (31), a second motor is mounted on the surface of the upper end of the stirring barrel (2), and the output end of the second motor is connected with one end of the stirring shaft (31).

5. The sewage purification preliminary filtration device for river pollution treatment according to claim 4, wherein: the stirring shaft is characterized in that a first bevel gear (35) is fixedly connected to the outer wall of the stirring shaft (31) near the upper end, a first transverse shaft (37) and a second transverse shaft (39) are rotatably connected to the two inner side walls of the mounting shell (32) near the upper end and the lower end respectively, one end of the first transverse shaft (37) is fixedly connected with a second bevel gear (36), the two bevel gears (36) are meshed with the first bevel gear (35), and a second transmission belt (38) is sleeved between the first transverse shaft (37) and the second transverse shaft (39).

6. The preliminary filtration device for purifying sewage for river pollution control according to claim 5, wherein: the mounting shell (32) is characterized in that fixed plates (40) are fixedly arranged on two outer side walls of the mounting shell (32), transverse plates (41) are fixedly connected to the positions, close to the upper end and the lower end, of the outer side walls of the fixed plates (40), one side, far away from the mounting shell (32), of the fixed plates (40) is rotationally connected with a movable plate II (44), and one end of the transverse shaft II (39) is fixedly connected with the movable plate II (44).

7. The sewage purification preliminary filtration device for river pollution treatment according to claim 6, wherein: the movable plate II (44) is provided with a connecting shaft (47) in an inserting mode, one end of the connecting shaft (47) is fixedly connected with a movable sleeve ring (46), a vertical shaft (43) is inserted in the movable sleeve ring (46), two ends of the vertical shaft (43) are rotationally connected with a movable plate I (42), two groups of movable plates I (42) are rotationally connected with movable shafts (50) between the outer side walls of the transverse plates (41), one ends of the movable plates I (42) are fixedly sleeved outside the two groups of movable shafts (50) respectively, and the outer walls of the movable shafts (50) are fixedly connected with dispersing plates (45) between the two groups of movable plates I (42).

8. The sewage purification preliminary filtration device for river pollution treatment according to claim 1, wherein: the pretreatment box is characterized in that an opening (27) is formed in the outer side wall of the pretreatment box (1) in a penetrating mode, a pollution discharge bin (17) is fixedly connected to the outer side wall of the pretreatment box (1) close to the edge position of the opening (27), a baffle (28) is movably inserted into the inner top end of the opening (27), a vertical groove (29) is formed in the outer side wall of the pretreatment box (1) close to the upper edge position of the opening (27), an electric telescopic rod (30) is arranged at the inner top end of the vertical groove (29), and one end of the electric telescopic rod (30) is fixedly connected with the baffle (28).

9. The sewage purification preliminary filtration device for river pollution treatment according to claim 1, wherein: the utility model discloses a pretreatment tank, including agitator (2) outer wall fixed mounting, agitator (2) outer wall fixed mounting has support (7), just agitator (2) one end and pretreatment tank (1) fixed connection are kept away from to support (7), agitator (2) bottom surface fixedly connected with blow off pipe (5), valve one is installed to blow off pipe (5) outer wall, agitator (2) outer wall is close to lower part fixedly connected with outlet pipe (4), valve two is installed to outlet pipe (4) outer wall, agitator (2) outer wall is close to upper portion fixedly connected with filling tube (34) agitator (2) outer wall is close to bottom position fixed mounting has a plurality of landing legs (3), pretreatment tank (1) upper end surface fixedly connected with water inlet pipe (6).