Sewage treatment equipment for environmental protection engineering

Abstract

The invention provides sewage treatment equipment for environmental protection engineering. The sewage treatment equipment comprises a primary tank and a secondary tank positioned below the primary tank, a discharge port is formed in one side, facing the second-stage tank, of the first-stage tank, and a waterwheel corresponding to the discharge port up and down is rotationally arranged on the second-stage tank, so that when sewage in the first-stage tank is discharged along the discharge port, the waterwheel rotates under the action of water flow; a cleaning assembly is arranged in the secondary tank and comprises a heavy object cleaning assembly, a floating object cleaning assembly in transmission connection with the heavy object cleaning assembly, a dosing assembly and a mixing assembly; by arranging the heavy object cleaning assembly, the floating object cleaning assembly, the chemical adding assembly and the mixing assembly, efficient treatment of sewage in the secondary tank is achieved. Due to the design, the sewage in the secondary tank does not need to be subjected to multi-stage complicated treatment steps, and sediments, floating objects and peculiar smell can be effectively treated at the same time, so that the sewage treatment efficiency is greatly improved, and a feasible scheme is provided for optimizing the sewage treatment process.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment, in particular to sewage treatment equipment for environmental protection engineering. Background Art

[0003] A Chinese patent discloses "a sewage treatment device for environmental protection engineering", the publication number of which is CN115784537B. The invention provides a sewage treatment device for environmental protection engineering, which relates to the technical field of sewage treatment, including a treatment box; the treatment box adopts an internally hollow rectangular block structure; a water inlet pipe is fixedly arranged on the top of the treatment box; the water inlet pipe adopts an internally hollow rectangular block structure; the water inlet pipe also includes: a third filter plate, two groups of third filter plates are arranged in total, and the filter holes of the third filter plate of the rear side group are smaller than the filter holes of the third filter plate of the front side group; a second guide rail, two groups of second guide rails are arranged in total; a rack, two groups of racks are arranged in total; the invention can automatically divert sewage according to the pollution degree and particle content of sewage, improve the treatment efficiency of sewage with a relatively light pollution degree, reduce the cost of sewage treatment, and solve some unnecessary steps in the process of treating sewage with a relatively light pollution degree, which not only affects the efficiency of sewage treatment, but also causes the problem of waste of resources.

[0004] The above patent still has the following shortcomings during use: although it can divert and treat sewage by itself, the sewage still needs to go through multiple steps during treatment, which reduces the efficiency of sewage treatment. Summary of the invention

[0005] The purpose of the present invention is to provide a sewage treatment equipment for environmental protection engineering, aiming to solve the problem in the prior art that sewage treatment requires multiple steps, resulting in low sewage treatment efficiency.

[0006] To achieve the above object, the present invention adopts the following technical solution: the sewage treatment equipment for environmental protection engineering comprises a primary pool and a secondary pool located below the primary pool; A discharge port is provided on one side of the primary pool facing the secondary pool, and a waterwheel corresponding to the discharge port is rotatably provided on the secondary pool, so that when the sewage in the primary pool is discharged along the discharge port, the waterwheel rotates under the action of the water flow; The secondary pool is provided with a cleaning assembly, which includes a heavy object cleaning assembly, a floating object cleaning assembly, a dosing assembly and a mixing assembly, which are respectively connected to the waterwheel for transmission; A storage tank is provided on the inner bottom wall of the secondary tank and at a position at one end of the heavy object cleaning assembly, and a suction pump is fixedly provided in the storage tank to suck out the sediment and heavy objects in the storage tank; The inner side wall top of the secondary pool far from the primary pool is provided with an inclined surface, so that the floating object cleaning component can push the floating objects onto the inclined surface; On the side of the primary pool facing the secondary pool, a placement groove for placing the chemical dosing component is opened, and the discharge end of the chemical dosing component is located above the secondary pool; The mixing components are several groups and are arranged at intervals along the extending direction of the secondary pool.

[0007] Preferably, the heavy object cleaning component is arranged at a position close to the inner bottom wall inside the secondary pool. A first driving rod is rotatably arranged on the inner wall of the secondary pool through a mounting seat, and the first driving rod is in transmission connection with the heavy object cleaning component; The first driving rod penetrates out of the secondary pool and is fixedly connected with a second transmission wheel. A rotating shaft extending in the front-back direction is fixedly arranged on the water wheel, and a first transmission wheel is fixedly arranged on the rotating shaft. The second transmission wheel and the first transmission wheel are in transmission connection through a first belt.

[0008] Preferably, the heavy object cleaning component includes two groups of sediment circulation components spaced front and back and extending in the left-right direction, and several scraping plates fixed between the two groups of sediment circulation components; A first connecting rod is fixedly arranged between the two groups of sediment circulation components, and one of the first connecting rods is fixedly connected with the first driving rod.

[0009] Preferably, each group of sediment circulation components includes a first sprocket fixedly arranged on the first connecting rod and a first chain wound around the two first sprockets; the scraping plates are fixedly arranged between the two first chains.

[0010] Preferably, the floating object cleaning component is in transmission connection with the first driving rod; The floating object cleaning component includes two groups of floating object circulation components spaced front and back and extending in the left-right direction, and several cleaning plates fixedly arranged between the two groups of floating object circulation components; A second connecting rod is fixedly connected between the two groups of floating object circulation components. A sixth sprocket is fixedly arranged on one of the second connecting rods, a fourth sprocket is fixedly arranged on the first driving rod, and the sixth sprocket and the fourth sprocket are in transmission connection through a second chain.

[0011] Preferably, each group of the floating object circulation components includes a third sprocket fixedly arranged on the second connecting rod and a third chain wound around the two third sprockets; The cleaning plates are fixedly arranged between the two third chains.

[0012] Preferably, a round rod extending in the front-back direction is rotatably arranged in the placement groove. A first bevel gear is fixedly arranged at one end of the round rod facing the chemical dosing component, a second bevel gear is fixedly arranged on the chemical dosing component, and the first bevel gear and the second bevel gear are meshed with each other; A third transmission wheel is fixedly arranged on the rotating shaft, and a fourth transmission wheel is fixedly arranged on the round rod that passes through the first-stage tank. The third transmission wheel and the fourth transmission wheel are connected by a second belt for transmission.

[0013] Preferably, the chemical dosing assembly includes an auger arranged in the placement groove, and the second bevel gear is fixedly arranged on one side of the auger close to the round rod, so that the drugs in the auger can be pushed towards the discharge end. An inlet end for dosing the auger is arranged on the front side of the first-stage tank.

[0014] Preferably, the other end of the rotating shaft is fixedly provided with a fifth transmission wheel, and a sixth transmission wheel is fixedly arranged on one of the mixing assemblies. The fifth transmission wheel and the sixth transmission wheel are connected by a third belt for transmission. Adjacent two mixing assemblies are connected by a fourth belt for transmission.

[0015] Preferably, the mixing assembly includes a rotating rod rotatably arranged on the second-stage tank, stirring blades fixedly arranged on the rotating rod, and a seventh transmission wheel fixedly arranged on the rotating rod. The other end of the rotating rod is rotatably connected to the inner side wall of the second-stage tank, and the fourth belt is wound between adjacent two seventh transmission wheels.

[0016] The beneficial effects are as follows: 1. Through the arranged heavy object cleaning assembly, floating object cleaning assembly, chemical dosing assembly and mixing assembly, efficient treatment of the sewage in the second-stage tank is realized. Among them, the heavy object cleaning assembly can accurately clean the sediment in the sewage to avoid its accumulation in the tank; the floating object cleaning assembly can clean various floating objects floating on the surface of the sewage to keep the surface of the sewage clean; the chemical dosing assembly adds chemicals into the second-stage tank, and these chemicals react chemically with the harmful substances in the sewage, so as to achieve the purpose of removing odors; and the mixing assembly is responsible for fully stirring and mixing the dosed sewage to ensure uniform contact between the chemicals and the sewage, so that the chemical reaction can proceed comprehensively and fully. Such a design enables the sewage in the second-stage tank to effectively treat sediment, floating objects and odors simultaneously without going through multiple complex treatment steps, greatly improving the efficiency of sewage treatment and providing a practical solution for the optimization of the sewage treatment process.

[0017] 2. An inclined surface is arranged in the first-stage tank, so that the sewage in the first-stage tank can flow towards the discharge port, and the sewage is discharged into the second-stage tank through the discharge port, thus facilitating the treatment of the sewage in the first-stage tank.

[0018] 3. Since the waterwheel and the discharge port of the first-level pool are connected to each other, the sewage can drive the waterwheel to rotate after being discharged from the discharge port, and the heavy object cleaning component, the dosing component and the mixing component are respectively connected to the waterwheel transmission, so that the waterwheel can drive the heavy object cleaning component, the dosing component and the mixing component to transmit during the rotation process, so as to achieve the purpose of saving energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a front structural schematic diagram of the present invention; Figure 2 It is a rear view structural schematic diagram of the present invention; Figure 3 It is a structural schematic diagram of a partial cross-section of a primary pool and a secondary pool of the present invention; Figure 4 It is a schematic diagram of the structure of the cleaning components of the present invention distributed in the secondary pool; Figure 5 It is a schematic structural diagram of the heavy object cleaning assembly of the present invention being driven by a waterwheel; Figure 6 The present invention Figure 5 A schematic diagram of the enlarged structure at point A; Figure 7 It is a schematic structural diagram of the floating object cleaning assembly of the present invention being driven by the first driving rod; Figure 8 It is a schematic structural diagram of the mixing assembly of the present invention being driven by the rotating shaft; Figure 9 It is a schematic structural diagram of the dosing assembly of the present invention being driven by the rotating shaft; Figure 10 The present invention Figure 9 A schematic diagram of the enlarged structure at B; In the figure: 1, primary pool; 2, secondary pool; 3, discharge port; 4, waterwheel; 5, first drive rod; 6, storage tank; 7, second transmission wheel; 8, rotating shaft; 9, first transmission wheel; 10, sediment circulation assembly; 1001, first sprocket; 1002, first chain; 11, scraper; 12, first connecting rod; 13, floating object circulation assembly; 1301, third sprocket; 1302, third chain; 14, cleaning plate; 15, second connecting rod; 16, sixth sprocket; 17, fourth sprocket; 18, second chain; 19, third transmission wheel; 20, round rod; 21, first bevel gear; 22, second bevel gear; 23, auger; 24, fifth transmission wheel; 25, sixth transmission wheel; 26, rotating rod; 27, stirring blade; 28, seventh transmission wheel; 29, fourth transmission wheel. DETAILED DESCRIPTION

[0020] The specific implementation of the sewage treatment equipment for environmental protection engineering of the present invention will be further described below in conjunction with the accompanying drawings.

[0021] like Figures 1 - 10 As shown, a sewage treatment equipment for environmental protection engineering is mainly used for sewage treatment. It does not require multi-stage treatment. After the sewage in the primary pool 1 flows into the secondary pool 2, the sediment in the sewage can be cleaned by the heavy object cleaning component, and the floating objects in the sewage can be cleaned by the floating object cleaning component. Moreover, the dosing component and the mixing component can be used to add chemicals to the sewage and fully mix them to improve the efficiency of sewage treatment.

[0022] In this embodiment, the sewage treatment equipment includes a primary pool 1 and a secondary pool 2 located below the primary pool 1. The sewage is first stored in the primary pool 1, and then the sewage in the primary pool 1 flows into the secondary pool 2 through the discharge port 3. The primary pool 1 is provided with a discharge port 3 on one side facing the secondary pool 2. In this embodiment, the inner bottom wall of the primary pool 1 is gradually inclined from the side wall to the discharge port 3, so that the primary pool 1 can better flow to the discharge port 3. A waterwheel 4 corresponding to the discharge port 3 is rotatably provided on the secondary pool 2, so that when the sewage in the primary pool 1 is discharged along the discharge port 3, the waterwheel 4 rotates under the action of the water flow, and when the sewage flows from the discharge port 3 to the secondary pool 2, it will drive the waterwheel 4 to rotate.

[0023] like Figures 1 - 5 As shown, a cleaning assembly is provided in the secondary pool 2, and the cleaning assembly includes a heavy object cleaning assembly, a floating object cleaning assembly, a dosing assembly and a mixing assembly which are transmission-connected to the heavy object cleaning assembly, and the heavy object cleaning assembly, the dosing assembly and the mixing assembly are transmission-connected to the waterwheel 4 respectively.

[0024] When the waterwheel 4 rotates, it can drive the heavy object cleaning component to transmit, so that the sediment in the secondary pool 2 is cleaned into the storage tank 6. The storage tank 6 is provided on the inner bottom wall of the secondary pool 2 and at one end of the heavy object cleaning component. A suction pump is fixedly provided in the storage tank 6 to absorb the heavy sediment in the storage tank 6. The sediment stored in the storage tank 6 is removed by the suction pump to achieve the purpose of cleaning the sediment in the sewage. In this embodiment, the structure and principle of the suction pump are prior art and will not be described in detail herein.

[0025] Specifically, Figure 5As shown, the heavy object cleaning component is arranged inside the secondary pool 2 near the inner bottom wall. A first driving rod 5 is rotatably arranged on the inner wall of the secondary pool 2 through a mounting seat. The first driving rod 5 is in transmission connection with the heavy object cleaning component; the first driving rod 5 passes through the secondary pool 2 and is fixedly connected with a second transmission wheel 7. A rotating shaft 8 extending in the front-rear direction is fixedly arranged on the waterwheel 4. A first transmission wheel 9 is fixedly arranged on the rotating shaft 8. When the waterwheel 4 rotates, it can drive the rotating shaft 8 to rotate, and when the rotating shaft 8 rotates, it can drive the first transmission wheel 9 to rotate. The second transmission wheel 7 and the first transmission wheel 9 are connected by a first belt, so the second transmission wheel 7 can be driven to rotate.

[0026] The heavy object cleaning component includes two groups of sediment circulation components 10 spaced apart front and rear and extending in the left-right direction and a plurality of scraping plates 11 fixed between the two groups of sediment circulation components 10; a first connecting rod 12 is fixedly arranged between the two groups of sediment circulation components 10. One of the first connecting rods 12 is fixedly connected with the first driving rod 5. When the first driving rod 5 rotates, it can drive one of the first connecting rods 12 to rotate.

[0027] Each group of sediment circulation components 10 includes a first sprocket 1001 fixedly arranged on the first connecting rod 12 and a first chain 1002 wound around the two first sprockets 1001; the scraping plate 11 is fixedly arranged between the two first chains 1002. When the first connecting rod 12 rotates, it can drive the first chain 1002 to rotate through the first sprocket 1001, so that the scraping plate 11 on the first chain 1002 can clean the sediment deposited on the inner bottom wall of the secondary pool 2.

[0028] As Figure 7 shown, an inclined surface is arranged at the top of the inner side wall of the secondary pool 2 far from the primary pool 1, so that the floating object cleaning component can push the floating objects onto the inclined surface for cleaning the floating objects in the sewage. The floating object cleaning component is arranged above the secondary pool 2 and on the side of the waterwheel 4 far from the primary pool 1.

[0029] Specifically, the floating object cleaning component is in transmission connection with the first driving rod 5; the floating object cleaning component includes two groups of floating object circulation components 13 spaced apart front and rear and extending in the left-right direction and a plurality of cleaning plates 14 fixedly arranged between the two groups of floating object circulation components 13; A second connecting rod 15 is fixedly connected between the two groups of floating object circulation components 13. A sixth sprocket 16 is fixedly arranged on one of the second connecting rods 15. A fourth sprocket 17 is fixedly arranged on the first driving rod 5. The sixth sprocket 16 and the fourth sprocket 17 are connected by a second chain 18. When the first driving rod 5 rotates, it can drive the fourth sprocket 17 to rotate. Since the fourth sprocket 17 and the sixth sprocket 16 are connected by the second chain 18, one of the second connecting rods 15 can be driven to rotate.

[0030] Each floating object circulating component 13 includes a third sprocket 1301 fixedly arranged on the second connecting rod 15 and a third chain 1302 wound around two third sprockets 1301. When the second connecting rod 15 rotates, it can drive the third sprocket 1301 to rotate, and then drive the cleaning plate 14 to rotate through the third chain 1302 to clean the floating objects on the water surface. The cleaning plate 14 is fixedly arranged between two third chains 1302.

[0031] As Figure 9 and Figure 10 shown, on one side of the primary pool 1 facing the secondary pool 2, a placement groove for placing the chemical dosing component is provided, and the discharge end of the chemical dosing component is located above the secondary pool 2 to facilitate the addition of chemicals into the secondary pool 2.

[0032] Specifically, a round rod 20 extending in the front-rear direction is rotatably arranged in the placement groove. A first bevel gear 21 is fixedly arranged at one end of the round rod 20 facing the chemical dosing component, and a second bevel gear 22 is fixedly arranged on the chemical dosing component. When the round rod 20 rotates, it can drive the first bevel gear 21 to rotate. Since the first bevel gear 21 and the second bevel gear 22 are meshed with each other, the auger 23 can be driven to rotate through the second bevel gear 22. In this embodiment, the principle and structure of the auger 23 are prior art and will not be elaborated in detail here; a third transmission wheel 19 is fixedly arranged on the rotating shaft 8, and the round rod 20 passes through the primary pool 1 and is fixedly provided with a fourth transmission wheel 29. When the rotating shaft 8 rotates, it can drive the third transmission wheel 19 to rotate. Since the third transmission wheel 19 and the fourth transmission wheel 29 are connected by a second belt, the fourth transmission wheel 29 can be driven to rotate, and then the round rod 20 can be driven to rotate.

[0033] The chemical dosing component includes an auger 23 arranged in the placement groove. The second bevel gear 22 is fixedly arranged on one side of the auger 23 close to the round rod 20, so that the drugs in the auger 23 can be pushed towards the discharge end. When the auger 23 rotates, the chemicals in the auger 23 can be pushed towards the discharge end, so that the chemicals can fall into the sewage in the secondary pool 2; an inlet end for adding chemicals to the auger 23 is provided on the front side of the primary pool 1, and the chemicals can be added into the auger 23.

[0034] As Figure 8 shown, there are several mixing components arranged at intervals along the extending direction of the secondary pool 2, which can stir and mix the sewage in the secondary pool 2 so that the chemicals added into the secondary pool 2 can be fully mixed and reacted.

[0035] Specifically, a fifth transmission wheel 24 is fixedly provided at the other end of the rotating shaft 8, and a sixth transmission wheel 25 is fixedly provided on one of the mixing components. When the rotating shaft 8 rotates, it can drive the fifth transmission wheel 24 to rotate. Since the fifth transmission wheel 24 and the sixth transmission wheel 25 are connected by a third belt drive, one of the mixing components can be driven to rotate through the sixth transmission wheel 25, and adjacent mixing components are connected by a fourth belt drive, so that multiple groups of mixing components all rotate, improving the mixing effect.

[0036] The mixing component includes a rotating rod 26 rotatably arranged on the secondary tank 2, a stirring blade 27 fixedly arranged on the rotating rod 26, and a seventh transmission wheel 28 fixedly arranged on the rotating rod 26. The other end of the rotating rod 26 is rotatably connected to the inner side wall of the secondary tank 2. The fourth belt is wound between adjacent seventh transmission wheels 28. The sixth transmission wheel 25 drives one of the rotating rods 26 to rotate, and adjacent rotating rods 26 are driven to rotate through the seventh transmission wheels 28 and the fourth belt.

[0037] Working principle: The sewage is stored in the first-stage tank 1. Then, the sewage in the first-stage tank 1 flows into the second-stage tank 2 through the discharge port 3. When the sewage flows from the discharge port 3 to the second-stage tank 2, it will drive the waterwheel 4 to rotate. When the waterwheel 4 rotates, it can drive the rotating shaft 8 to rotate. When the rotating shaft 8 rotates, it can drive the first transmission wheel 9 to rotate. The second transmission wheel 7 and the first transmission wheel 9 are connected by a first belt drive, so it can drive the second transmission wheel 7 to rotate. When the second transmission wheel 7 rotates, it can drive one of the first connecting rods 12 to rotate. When the first connecting rod 12 rotates, it can drive the first chain 1002 to rotate through the first sprocket 1001, so that the scraper 11 on the first chain 1002 can clean the sediment deposited on the bottom wall of the second-stage tank 2. At the same time, when the first driving rod 5 rotates, it can drive the fourth sprocket 17 to rotate. The fourth sprocket 17 and the sixth sprocket 16 are connected by a second chain 18, so it can drive one of the second connecting rods 15 to rotate. When the second connecting rod 15 rotates, it can drive the third sprocket 1301 to rotate. By meshing with the third sprocket 1301 through the third chain 1302, the cleaning plate 14 is driven to rotate to clean the floating objects floating on the water surface. When the rotating shaft 8 rotates, it can also drive the third transmission wheel 19 to rotate. Since the third transmission wheel 19 and the fourth transmission wheel 29 are connected by a second belt drive, it can drive the fourth transmission wheel 29 to rotate, and then drive the round rod 20 to rotate. When the round rod 20 rotates, it can drive the first bevel gear 21 to rotate. Since the first bevel gear 21 and the second bevel gear 22 are meshed with each other, it can drive the auger 23 to rotate through the second bevel gear 22, and push the medicament in the auger 23 to the discharge end, so that the medicament can fall into the sewage in the second-stage tank 2. When the rotating shaft 8 rotates, it can drive one of the mixing components to rotate by driving the fifth transmission wheel 24 and the sixth transmission wheel 25. The adjacent two mixing components are connected by a fourth belt drive, so that multiple groups of mixing components rotate, improving the mixing effect. The treated sewage is then discharged to the next process through the drain pipe provided on the second-stage tank 2.

[0038] The above-described embodiments of the present invention do not constitute a limitation to the protection scope of the present invention. The basic concept of the present invention is that the waterwheel 4 rotates under the action of water flow, so that it can drive the heavy object cleaning component to clean the sediment, and can also drive the floating object cleaning component to clean the floating objects, and can further drive the medicine adding component and the mixing component to add medicine to the second-stage tank 2 and mix it. This process improves the efficiency of sewage treatment and reduces the input cost. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the claims of the present invention.

Claims

1. A sewage treatment device for environmental protection engineering, characterized in that, It includes a primary pool (1) and a secondary pool (2) located below the primary pool (1); A discharge port (3) is provided on one side of the primary pool (1) facing the secondary pool (2), and a waterwheel (4) is rotatably provided on the secondary pool (2) corresponding to the discharge port (3) above and below, so that when sewage in the primary pool (1) is discharged along the discharge port (3), the waterwheel (4) rotates under the action of the water flow; A cleaning assembly is provided in the secondary pool (2), the cleaning assembly comprising a heavy object cleaning assembly, a floating object cleaning assembly, a dosing assembly and a mixing assembly which are transmission-connected to the heavy object cleaning assembly, and the heavy object cleaning assembly, the dosing assembly and the mixing assembly are respectively transmission-connected to the waterwheel (4); A storage tank (6) is provided on the inner bottom wall of the secondary pool (2) and at a position at one end of the heavy object cleaning assembly, and a suction pump is fixedly provided in the storage tank (6) so as to suck out the sediment and heavy objects in the storage tank (6); The top of the inner side wall of the secondary pool (2) away from the primary pool (1) is provided with an inclined surface so that the floating object cleaning component can push the floating objects onto the inclined surface; A placement groove for placing a dosing component is provided on one side of the primary tank (1) facing the secondary tank (2), and a discharge end of the dosing component is located above the secondary tank (2); The mixing components are divided into a plurality of groups and are arranged at intervals along the extension direction of the secondary tank (2).

2. The sewage treatment equipment for environmental protection engineering according to claim 1, characterized in that, The heavy object cleaning assembly is arranged inside the secondary pool (2) at a position close to the inner bottom wall, and a first driving rod (5) is rotatably arranged on the inner wall of the secondary pool (2) via a mounting seat, and the first driving rod (5) is drivingly connected to the heavy object cleaning assembly; The first driving rod (5) passes through the secondary pool (2) and is fixedly connected to a second transmission wheel (7); a rotating shaft (8) extending in a front-rear direction is fixedly provided on the waterwheel (4); a first transmission wheel (9) is fixedly provided on the rotating shaft (8); and the second transmission wheel (7) and the first transmission wheel (9) are connected via a first belt drive.

3. The sewage treatment equipment for environmental protection projects according to claim 2, characterized in that, The heavy object cleaning assembly comprises two groups of sediment circulation assemblies (10) spaced apart from each other and extending in the left-right direction, and a plurality of scrapers (11) fixed between the two groups of sediment circulation assemblies (10); A first connecting rod (12) is fixedly arranged between the two groups of sediment circulation assemblies (10), wherein one of the first connecting rods (12) is fixedly connected to the first driving rod (5).

4. A sewage treatment device for environmental protection engineering according to claim 3, characterized in that, Each set of sediment circulation components (10) comprises a first sprocket (1001) fixedly mounted on a first connecting rod (12) and a first chain (1002) wound around the two first sprockets (1001); the scraper (11) is fixedly mounted between the two first chains (1002).

5. The sewage treatment equipment for environmental protection projects according to claim 2, characterized in that, The floating object cleaning assembly is in transmission connection with the first driving rod (5); The floating object cleaning assembly comprises two groups of floating object circulation assemblies (13) spaced apart from each other and extending in the left-right direction, and a plurality of cleaning plates (14) fixedly arranged between the two groups of floating object circulation assemblies (13); A second connecting rod (15) is fixedly connected between the two groups of floating object circulation assemblies (13), a sixth sprocket (16) is fixedly provided on one of the second connecting rods (15), a fourth sprocket (17) is fixedly provided on the first driving rod (5), and the sixth sprocket (16) and the fourth sprocket (17) are connected in transmission via a second chain (18).

6. The sewage treatment equipment for environmental protection projects according to claim 5, characterized in that, Each group of the floating object circulation components (13) comprises a third sprocket (1301) fixedly mounted on the second connecting rod (15) and a third chain (1302) wound around the two third sprockets (1301); The cleaning plate (14) is fixedly arranged between the two third chains (1302).

7. The sewage treatment equipment for environmental protection engineering according to claim 2, characterized in that, A round rod (20) extending in the front-to-back direction is rotatably disposed in the placement groove, a first bevel gear (21) is fixedly disposed at one end of the round rod (20) facing the medicine adding assembly, a second bevel gear (22) is fixedly disposed on the medicine adding assembly, and the first bevel gear (21) and the second bevel gear (22) are meshed with each other; A third transmission wheel (19) is fixedly provided on the rotating shaft (8), a fourth transmission wheel (29) is fixedly provided on the round rod (20) passing through the first-level pool (1), and the third transmission wheel (19) and the fourth transmission wheel (29) are connected via a second belt transmission.

8. A sewage treatment device for environmental protection projects according to claim 7, characterized in that, The medicine adding assembly comprises an auger (23) arranged in the placement groove, and the second bevel gear (22) is fixedly arranged on a side of the auger (23) close to the round rod (20), so that the medicine in the auger (23) can be pushed to the discharge end; The front side of the primary tank (1) is provided with an inlet end for adding medicine to the auger (23).

9. The sewage treatment equipment for environmental protection projects according to claim 2, wherein, A fifth transmission wheel (24) is fixedly provided at the other end of the rotating shaft (8), a sixth transmission wheel (25) is fixedly provided on one of the mixing assemblies, and the fifth transmission wheel (24) and the sixth transmission wheel (25) are connected via a third belt transmission; Two adjacent mixing assemblies are connected via a fourth belt transmission.

10. A sewage treatment device for environmental protection engineering according to claim 9, characterized in that, The mixing assembly comprises a rotating rod (26) rotatably mounted on the secondary tank (2), a stirring blade (27) fixedly mounted on the rotating rod (26), and a seventh transmission wheel (28) fixedly mounted on the rotating rod (26); The other end of the rotating rod (26) is rotatably connected to the inner wall of the secondary pool (2), and the fourth belt is wound between two adjacent seventh transmission wheels (28).

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