Solar-energy-based in-situ purification device for polluted water bodies of still water rivers and lakes

By setting up biological guidance channels and impurity guidance channels in the static river and lake pollutant water purification device, combining multi-directional water flow and different size mesh frame structures, the problem of biological death during the purification process is solved, and safe guidance of organisms and effective separation and collection of impurities are achieved.

CN120504395AActive Publication Date: 2025-08-19QINGDAO PLANNING ENG DESIGN RES INST CO LTD +1
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Patent Information

Application Number
CN202510512686.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-04-23
Publication Date
2025-08-19
Estimated Expiration
2045-04-23

AI Technical Summary

Technical Problem

In the prior art, impurities carry organisms and cause organisms to die during the purification process of polluted water bodies.

Method used

A solar-based static water pollution water purification device is designed, including a first filter tank, a second filter tank and a collection tank, a biological guide channel and an impurity guide channel, and a multi-directional water flow is used to separate biological and impurities, and the separation and collection of impurities are achieved using screen plates and frame structures of different sizes.

Benefits of technology

Effectively separate organisms and impurities to avoid organisms from dying during purification, realize the guidance of organisms and the collection of impurities, and improve the purification efficiency.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention relates to a solar energy-based still water river and lake polluted water body in-situ purification device, and relates to the technical field of water treatment.The device comprises a first filter tank, a second filter tank and a collection tank which are used for guiding impurities, and the first filter tank and the second filter tank are provided with biological guiding channels for realizing biological guiding; and the first filter tank and the second filter tank are provided with impurity guide channels for realizing impurity guide. The biological guiding channel is arranged to guide organisms entering the vicinity of the purification equipment by mistake, and the biological guiding channel is further used for guiding impurities to collect the impurities, so that the problem that in the prior art, the organisms enter the purification equipment and make contact with many impurities, and the purification efficiency of the purification equipment is improved can be solved. And the problem of biological death caused by accumulation of impurities is solved.
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Description

Technical Field

[0001] The present invention relates to the technical field of water treatment, and in particular to an in-situ purification device for polluted water in still rivers and lakes based on solar energy. Background Art

[0002] In-situ purification technology for contaminated water is a method for directly purifying polluted water bodies. It is suitable for pollution control of rivers, lakes, reservoirs and other water bodies. Among them, the more commonly used method is to use in-situ purification tank technology, which is mainly used to treat pollutants in contaminated water by means of adsorption filtration, or to use microorganisms on biological fillers to degrade organic matter to achieve purification of contaminated water.

[0003] For example, in the patent document with application number 201720972812.1, an in-situ purification device for river sewage is disclosed, and it is specifically disclosed that the presence of a diversion wall can guide the river sewage so that the sewage is guided into the biological filler module for purification.

[0004] In clean water areas such as rivers and lakes, the density of organisms in the water is relatively high. Under the guidance of the water flow, some organisms will be guided into the biological filler module. The living environment in this module is not suitable for the survival of organisms. Due to the existence of various diversion walls, it is inconvenient for organisms to escape, and large impurities will carry organisms into the purification module, causing an increase in the mortality rate of organisms. Summary of the Invention

[0005] The purpose of the present invention is to provide an in-situ purification device for polluted water in still rivers and lakes based on solar energy.

[0006] The technical problem solved by the present invention is to solve the problem in the prior art that when cleaning impurities in sewage, the impurities always carry organisms and cause the death of the organisms.

[0007] The present invention can be implemented through the following technical solution: an in-situ purification device for polluted water bodies in still rivers and lakes based on solar energy, comprising a first filter pool, a second filter pool and a collection pool for guiding impurities, the first filter pool and the second filter pool being provided with biological guidance channels for achieving biological guidance, and the first filter pool and the second filter pool being provided with impurity guidance channels for achieving impurity guidance.

[0008] A further technical improvement of the present invention is that: the first filter tank is provided with a first-direction water flow for providing lateral thrust, the interior of the second filter tank is provided with a second-direction water flow for providing longitudinal thrust, and the top of the second filter tank is provided with a third-direction water flow for providing lateral thrust, and the height of the third-direction water flow is higher than the height of the first-direction water flow.

[0009] A further technical improvement of the present invention is that a first small-sized mesh plate is provided on the side of the first filter tank, a first large-sized mesh plate is fixed on the first small-sized mesh plate, and a matching mesh plate is provided on the side of the first small-sized mesh plate, the height of the matching mesh plate is adjustable, and the mesh size of the first small-sized mesh plate is smaller than that of the first large-sized mesh plate, and the mesh size of the matching mesh plate is smaller than that of the first small-sized mesh plate.

[0010] A further technical improvement of the present invention is that a sealing bottom plate is slidingly provided inside the first filter tank, the sealing bottom plate cooperates with the matching mesh plate, and the sealing bottom plate can move longitudinally; a second small-size mesh plate is provided on the side of the first filter tank, a second large-size mesh plate is fixed on the second small-size mesh plate, and the size of the second small-size mesh plate is smaller than the mesh size of the second large-size mesh plate.

[0011] A further technical improvement of the present invention is that a small-sized frame is provided inside the second filter tank for longitudinal sliding. The small-sized frame is a movable channel connected at both ends, and mesh holes are provided around the small-sized frame. A bottom drainage device for providing water flow in the second direction is fixed on the small-sized frame.

[0012] A further technical improvement of the present invention is that: a third-largest-sized mesh plate is fixed on the side of the second filter tank, a fourth-largest-sized mesh plate is fixed on the third-largest-sized mesh plate, a third-smallest-sized mesh plate is arranged on the side of the fourth-largest-sized mesh plate, the third-smallest-sized mesh plate is fixedly mounted on the small-sized frame, and the mesh size of the third-smallest-sized mesh plate is smaller than the mesh size of the fourth-largest-sized mesh plate, and the mesh size of the third-largest-sized mesh plate is the same as the mesh size of the fourth-largest-sized mesh plate.

[0013] A further technical improvement of the present invention is that a third traction chain and a fourth traction chain are fixed to the sides of the small-size frame respectively, the traction power of the third traction chain and the fourth traction chain is driven by a traction roller, and the traction roller is driven by a traction motor, and the power of the traction motor comes from solar power generation equipment.

[0014] A further technical improvement of the present invention is that a fixed support base is fixed on the top of the second largest size mesh plate, and a top drainage device for providing a third directional water flow is provided on the fixed support base.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The present application is to guide organisms that have strayed into the vicinity of the purification equipment by providing a biological guidance channel, and the present application is also provided with a device for guiding impurities to collect impurities. Therefore, the present application can solve the problem of biological death caused by organisms entering the purification equipment, coming into contact with a large amount of impurities, and accumulating with the impurities in the prior art.

[0017] 2. The present application separates large impurities and organisms by utilizing the first filter tank. Under the guidance of the water flow in the first direction and the shielding effect of the mesh plate, the organisms will move upward into the interior of the first filter tank, and then pass through the second large-size mesh plate into the interior of the second filter tank. The second filter tank is used to guide the organisms and guide them out of the purification equipment, thereby solving the problem of death caused by the accumulation of organisms and impurities during the purification process.

[0018] 3. Through the function of the second filter tank, the present application can not only purify and pass through small impurities in the initial state, but also pass through large impurities when the small-size frame moves longitudinally, and push the organisms retained in the second filter tank upward when the small-size frame moves longitudinally, so as to avoid the problem of death caused by the organisms colliding with the equipment under the action of the high-pressure first-direction water flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] To facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0020] Figure 1 A schematic diagram of the relative positions of the first filter tank and the second filter tank of the present invention;

[0021] Figure 2 It is a schematic structural diagram of the guiding device of the present invention;

[0022] Figure 3 It is a schematic diagram of the water flow direction of the present invention.

[0023] In the figure: 1. Drainage equipment; 2. First filter tank; 3. Second filter tank; 4. Collection tank; 5. Separable collection equipment; 6. Sealing bottom plate; 7. First small-size mesh plate; 8. Matching mesh plate; 9. First traction chain; 10. First large-size mesh plate; 11. Sealing top plate; 12. Second traction chain; 13. Top traction plate; 14. Fixed support base; 15. Top drainage equipment; 16. Bottom drainage equipment; 17. Small-size frame; 18. Third traction chain; 19. Fourth traction chain; 20. Fixed baffle; 21. Movable support plate; 22. Balancing support plate; 23. Balancing base; 24. Gravity balance block; 25. Second large-size mesh plate; 26. Second small-size mesh plate; 27. Third large-size mesh plate; 28. Fourth large-size mesh plate; 29. Third small-size mesh plate; 30. Top traction chain. DETAILED DESCRIPTION

[0024] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0025] See also Figure 1-3 As shown, a solar-powered in-situ purification device for polluted water bodies in still rivers and lakes comprises a first filter tank 2, a second filter tank 3, a collection tank 4 and a detachable collection device 5 for collecting pollutants. First, through the guiding effect of the water flow, impurities are first allowed to enter the interior of the first filter tank 2 for preliminary treatment, and then the impurities enter the interior of the second filter tank 3. In the interior of the second filter tank 3, the organisms are guided out. After the organisms are guided out of the purification device, the impurities are then guided into the collection tank 4 until the impurities enter the interior of the detachable collection device 5. The impurities in the detachable collection device 5 are discharged to collect the impurities. The impurities in the detachable collection device 5 are discharged into the in-situ purification device to further treat the impurities.

[0026] Specifically, in the present application, the first filter tank 2 is used to allow large impurities, small impurities and organisms to pass through, and then the second filter tank 3 is used to discharge organisms and push large impurities and small impurities into the interior of the collection tank 4. Therefore, in this process, the organisms can be guided out and the impurities can be collected and processed at the same time.

[0027] Therefore, three sets of water flow directions are provided in the present application, namely, the first water flow direction is parallel to the first filter pool 2, the second filter pool 3 and the collection pool 4, and is used to push impurities from the first filter pool 2 to the inside of the second filter pool 3, and to push impurities from the second filter pool 3 to the inside of the collection pool 4; the second water flow direction is perpendicular to the direction of the second filter pool 3, and is vertically upward relative to the water bottom, and is used to provide an upward water flow. In this process, the upward water flow is weak and it is difficult to drive impurities to move too far upward, but organisms themselves like to move along the direction of the water flow, so this process can ensure that organisms swim to the position of the third water flow direction; the third water flow direction is parallel to the first water flow direction, but the water flow height in the third water flow direction is higher than that in the first water flow direction, and is used to guide organisms out from the third water flow direction. At this time, the effect of the first water flow direction can be utilized to guide and clean impurities.

[0028] The input end of the first filter tank 2 is provided with a first small-size mesh plate 7, and a first large-size mesh plate 10 is provided on the first small-size mesh plate 7. At the same time, a matching mesh plate 8 is provided on the side of the first small-size mesh plate 7. The height of the matching mesh plate 8 is adjustable, and the matching mesh plate 8 cooperates with the first small-size mesh plate 7 and the first large-size mesh plate 10 respectively. That is, when in use, the matching mesh plate 8 acts on the first small-size mesh plate 7. At this time, impurities carry the organisms to the first small-size mesh plate 7 and the first large-size mesh plate 10. At this time, small impurities pass through the matching mesh plate 8 and the first small-size mesh plate 7 into the interior of the first filter tank 2, and large impurities and organisms are hit on the first small-size mesh plate 7, or large impurities and organisms at a higher height enter the interior of the first filter tank 2 from the first large-size mesh plate 10. Under the action of the first water flow direction and the swimming ability of the organisms themselves, the organisms enter the position of the first large-size mesh plate 10 and enter the second filter tank 3, and then continue to use the second water flow direction. The organisms are allowed to float up until they float to the third water flow direction. The third water flow direction is used to guide the organisms out of the second filter pool 3, avoiding the organisms from participating in the impurity purification process and effectively protecting the organisms in the water. Large impurities fall on the side of the matching mesh plate 8 under the action of gravity, and then the matching mesh plate 8 is used to move longitudinally on the first large-size mesh plate 10, so that the large impurities pass through the first small-size mesh plate 7 and enter the first filter pool 2. In this process, the entry of external impurities is stopped, and only the current impurities are processed. In this process, the size of the first small-size mesh plate 7 is slightly smaller than the size of the first large-size mesh plate 10, and the size of the first small-size mesh plate 7 is larger than the size of the matching mesh plate 8. In this process, when the matching mesh plate 8 overlaps the first small-size mesh plate 7, the current large impurities are accumulated on the matching mesh plate 8 under the action of gravity, and the larger-sized organisms pass through the first large-size mesh plate 10 to reach the inside of the second filter pool 3, thereby realizing the preliminary separation of organisms and impurities.

[0029] Furthermore, a sealing bottom plate 6 is provided at the bottom of the first filter tank 2. The sealing bottom plate 6 can move longitudinally. When the sealing bottom plate 6 moves longitudinally to the connection position of the first small-size mesh plate 7 and the first large-size mesh plate 10, the mesh plate 8 is longitudinally moved onto the first large-size mesh plate 10 to block the first large-size mesh plate 10. At this time, large impurities will push the impurities accumulated on the side of the first small-size mesh plate 7 into the interior of the first filter tank 2 through the first water flow direction. The sealing bottom plate 6 and the first small-size mesh plate 7 form a passage for large impurities to pass through, thereby enabling the large impurities to be moved to the interior of the second filter tank 3, thereby guiding the large impurities.

[0030] Therefore, in order to realize the movement and guidance of large impurities, a second small-sized mesh plate 26 is fixed on the side of the first filter tank 2, and a second large-sized mesh plate 25 is fixed on the second small-sized mesh plate 26. The second small-sized mesh plate 26 is used to allow impurities to pass through, and the existence of the second large-sized mesh plate 25 is used to guide the passage of organisms, thereby enabling the organisms to realize the guidance function on the second filter tank 3.

[0031] As a further embodiment of the present application, a small-sized frame 17 is provided inside the second filter tank 3, wherein the two ends of the small-sized frame 17 are connected, mesh holes are evenly provided around the small-sized frame 17, and the height of the small-sized frame 17 is adjustable, and a bottom drainage device 16 for providing a second water flow direction is fixed on the small-sized frame 17, and a third large-sized mesh plate 27 is fixed on the side of the second filter tank 3, wherein a fourth large-sized mesh plate 28 is fixed on the third large-sized mesh plate 27, and a third small-sized mesh plate 29 for cooperating with the fourth large-sized mesh plate 28 is provided on the small-sized frame 17, that is, when the organism is trapped by the third large-sized mesh plate When the organisms are guided to the position of the second filter tank 3 by the small-size frame 17, the organisms are guided out by the second direction water flow provided by the bottom drainage device 16 on the small-size frame 17. After being guided for a period of time, the small-size frame 17 is controlled to move longitudinally until the third small-size mesh plate 29 is removed from the fourth large-size mesh plate 28. At this time, the impurities can pass through the second small-size mesh plate 26 to reach the third large-size mesh plate 27. At the same time, due to the existence of the small-size frame 17, the impurities can pass through the small-size frame 17 through the third large-size mesh plate 27 and then be transferred from the fourth large-size mesh plate 28 to the inside of the collection tank 4, so as to be collected by the detachable collection device 5.

[0032] In the present application, when the small-size frame 17 is lowered to the lowest end, it is used to enable small impurities to reach the inside of the second filter pool 3 from the first filter pool 2, and then reach the inside of the collection pool 4, and the small impurities are collected by the collection pool 4. When the small-size frame 17 moves to the highest end, the residual organisms in the second filter pool 3 can be pushed upward, and at the same time, two passing channels can be formed, both of which can enable large impurities to pass through, making it convenient to collect impurities by the collection pool 4.

[0033] As a further embodiment of the present application, in order to realize the longitudinal movement of the small-size frame 17, and in order to realize the longitudinal movement of the sealing bottom plate 6 and the matching mesh plate 8, a first traction chain 9 is fixed on the matching mesh plate 8, and a second traction chain 12 is fixed on the sealing bottom plate 6, wherein the second traction chain 12 is provided with two groups, and at the same time, a third traction chain 18 is fixed on one side of the small-size frame 17, wherein the first traction chain 9, the second traction chain 12 and the third traction chain 18 are fixedly installed on the top traction plate 13, and a fourth traction chain 19 is fixed on the other end of the small-size frame 17, wherein the fourth traction chain 19 is fixedly installed. It is installed on the mobile support plate 21, and a balancing mechanism for position stability is provided at the other end of the mobile support plate 21. Therefore, in this application, the top traction plate 13 and the mobile support plate 21 are respectively installed at the output ends of the longitudinal moving device, and the longitudinal moving device includes but is not limited to power equipment such as a pulling power chain and a pulling power roller, that is, the pulling power roller is driven by a power motor to realize the retraction and extension function of the pulling power chain, which is used to realize the longitudinal movement of the top traction plate 13 and the mobile support plate 21 installed at the end of the pulling power chain, and then realize the longitudinal movement of the matching mesh plate 8, the sealing bottom plate 6 and the small-size frame 17.

[0034] Specifically, the balancing mechanism includes a balancing base 23, on which a gravity balancing block 24 is slidably arranged. The gravity balancing block 24 is cast concrete, and the gravity balancing block 24 is fixedly mounted on the movable support plate 21. In the present application, a gravity balancing block 24 with a certain weight is used to realize the gravity balancing function of the movable support plate 21. At the same time, in the present application, the overall power of the equipment comes from the combined action of solar power generation equipment and external power grids, so as to maintain the stable operation of the water treatment equipment.

[0035] In this application, the bottom drainage device 16 adopts the joint action of a water pump and an output pipe, that is, the water pump is installed in a fixed position, but an output pipe is provided at the output end of the water pump. There are two groups of output pipes, one group is fixedly installed on the small-size frame 17, and the other group is installed on the top drainage device 15.

[0036] Specifically, a fixed support base 14 is fixed on the top of the second largest size mesh plate 25, wherein a top drainage device 15 is fixed on the fixed support base 14, wherein the water flow output by the output pipe is used to realize the realization of the third direction water flow, and then used to realize the guidance and discharge of the organisms. A fixed baffle 20 is fixed on the top of the fourth largest size mesh plate 28. The height of the fixed baffle 20 is the same as the height of the fixed support base 14, which is used to realize that when the second direction water flow acts on the organism, if there are impurities moving upward under the action of the second direction water flow until the action of the second direction water flow weakens, the impurities will be blocked by the fixed baffle 20, and the organisms will move upward due to their own perception of the water flow direction. Therefore, when the second water flow direction stops, the impurities will fall back on the small size frame 17, and the first water flow direction is started to realize the impurities entering the collection pool 4 for collection.

[0037] When the present invention is in use, the first direction of the water flow is used to firstly carry the impurities and the organisms into the side of the first filter pool 2. Then, the organisms are guided by the first direction of the water flow to the first large-size mesh plate 10, thereby allowing the organisms to enter the interior of the first filter pool 2, while small impurities enter the first small-size mesh plate 7, and then pass through the second small-size mesh plate 26 to enter the interior of the second filter pool 3. Then, the small impurities pass through the small-size frame 17 and enter the interior of the collection pool 4 to achieve direct collection of the small impurities.

[0038] Later in the process, large impurities are retained on the side of the first small-sized mesh plate 7 under the action of gravity. At this time, the organisms enter the interior of the second filter tank 3. Under the action of the bottom drainage device 16, an upward water flow is applied, that is, under the action of the second water flow direction, a weak upward water flow is applied to the organisms. At this time, when the organisms move to above the fixed baffle 20 under the action of the water flow, they are guided out of the interior of the second filter tank 3 under the action of the third water flow direction.

[0039] Then, a power device is used to control the longitudinal movement of the top traction plate 13 and the movable support plate 21. At this time, the mesh plate 8 is covered on the first large-size mesh plate 10, and the small-size frame 17 moves to the highest end. At this time, external impurities are stopped from entering the equipment, that is, the amount of impurities flowing to the side of the first filter tank 2 will no longer increase. Under the action of the first water flow direction, large impurities pass through the first small-size mesh plate 7 and enter the interior of the first filter tank 2. At this time, under the action of the sealing bottom plate 6, the first small-size mesh plate 7 and the second small-size mesh plate 26 realize a circulation channel for large impurities, which is convenient for using a larger water flow thrust to push the impurities into the interior of the second filter tank 3. Then the impurities pass through the third large-size mesh plate 27 to the interior of the collection tank 4, so that the detachable collection device 5 can realize the collection of impurities. In this application, the guidance of the water flow direction is convenient for guiding organisms, which solves the problem of biological death caused by organisms being trapped in the equipment.

[0040] In the present application, the mesh size of the first small-size mesh plate 7 is the same as that of the second small-size mesh plate 26, which is used to guide the passage of large impurities. The size of the first large-size mesh plate 10, the second large-size mesh plate 25, and the fourth large-size mesh plate 28 are the same, which is used to guide the passage of large impurities and larger organisms. The mesh size of the matching mesh plate 8, the third small-size mesh plate 29 and the small-size frame 17 is the same, which is used to allow small impurities to pass through and avoid the passage of large impurities and larger organisms. In the present application, by guiding larger organisms, the death of larger organisms can be reduced.

[0041] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as above in terms of a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can, without departing from the scope of the technical solution of the present invention, make some changes or modifications to equivalent embodiments using the technical contents disclosed above. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are within the scope of the technical solution of the present invention.

Claims

1. A solar-powered in-situ purification device for polluted water in still rivers and lakes, characterized by: The invention comprises a first filter pool (2), a second filter pool (3) and a collection pool (4) for guiding impurities, wherein the first filter pool (2) and the second filter pool (3) are provided with biological guidance channels for achieving biological guidance, and the first filter pool (2) and the second filter pool (3) are provided with impurity guidance channels for achieving impurity guidance.

2. The solar-powered in-situ purification device for polluted water in still rivers and lakes according to claim 1 is characterized in that: The first filter tank (2) is provided with a first-direction water flow for providing a transverse thrust, the interior of the second filter tank (3) is provided with a second-direction water flow for providing a longitudinal thrust, and the top of the second filter tank (3) is provided with a third-direction water flow for providing a transverse thrust, and the height of the third-direction water flow is higher than that of the first-direction water flow.

3. The solar-powered in-situ purification device for polluted water in still rivers and lakes according to claim 1 is characterized in that: A first small-sized mesh plate (7) is provided on the side of the first filter tank (2), a first large-sized mesh plate (10) is fixed on the first small-sized mesh plate (7), and a matching mesh plate (8) is provided on the side of the first small-sized mesh plate (7), the height of the matching mesh plate (8) is adjustable, and the mesh size of the first small-sized mesh plate (7) is smaller than the size of the first large-sized mesh plate (10), and the mesh size of the matching mesh plate (8) is smaller than the mesh size of the first small-sized mesh plate (7).

4. The solar-powered in-situ purification device for polluted water in still rivers and lakes according to claim 3 is characterized in that: A sealing bottom plate (6) is slidingly provided inside the first filter tank (2), the sealing bottom plate (6) cooperates with a matching mesh plate (8), and the sealing bottom plate (6) can move longitudinally. A second small-sized mesh plate (26) is provided on the side of the first filter tank (2), a second large-sized mesh plate (25) is fixed on the second small-sized mesh plate (26), and the size of the second small-sized mesh plate (26) is smaller than the mesh size of the second large-sized mesh plate (25).

5. The solar-powered in-situ purification device for polluted water in still rivers and lakes according to claim 1 is characterized in that: A small-sized frame (17) is provided in the interior of the second filter tank (3) for longitudinal sliding. The small-sized frame (17) is a movable channel with two ends connected, and mesh holes are provided around the small-sized frame (17). A bottom drainage device (16) for providing water flow in the second direction is fixed on the small-sized frame (17).

6. The solar-powered in-situ purification device for polluted water in still rivers and lakes according to claim 5 is characterized in that: A third large-size mesh plate (27) is fixed on the side of the second filter tank (3), a fourth large-size mesh plate (28) is fixed on the third large-size mesh plate (27), a third small-size mesh plate (29) is provided on the side of the fourth large-size mesh plate (28), the third small-size mesh plate (29) is fixedly mounted on the small-size frame (17), and the mesh size of the third small-size mesh plate (29) is smaller than the mesh size of the fourth large-size mesh plate (28), and the mesh size of the third large-size mesh plate (27) is the same as the mesh size of the fourth large-size mesh plate (28).

7. The solar-powered in-situ purification device for polluted water in still rivers and lakes according to claim 5 is characterized in that: A third traction chain (18) and a fourth traction chain (19) are fixed to the sides of the small-size frame (17), respectively. The traction power of the third traction chain (18) and the fourth traction chain (19) is driven by a traction roller, and the traction roller is driven by a traction motor. The power of the traction motor comes from a solar power generation device.

8. The solar-powered in-situ purification device for polluted water in still rivers and lakes according to claim 4 is characterized in that: A fixed support base (14) is fixed on the top of the second large-size mesh plate (25), and a top drainage device (15) for providing a third-directional water flow is provided on the fixed support base (14).

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