Riverway sludge cleaning and recycling device and method

Abstract

The application discloses a kind of river sludge cleaning and recycling equipment and method, belong to environmental protection equipment field, the equipment includes working plane, and working plane is equipped with stone screening unit and separation unit, and filter device is equipped in stone screening unit and separation unit, and scraping wall device is equipped in separation unit;Stone screening unit includes screening frame, and a plurality of rotating rollers are rotatably installed above screening frame, and the gap between rotating roller can realize the separation of sand and other large impurities and sludge, and the sludge after separation is transferred to separation unit for further dehydration;Separation unit includes collection barrel, and separation barrel is rotatably installed in collection barrel, and sludge after being treated by stone screening unit enters separation barrel, and separation barrel rotates under the action of driver to realize the dehydration of sludge;Collected river water after separation, and the sludge on the barrel wall after dehydration is cleaned using scraping wall device.The equipment can solve the problem of equipment blockage and damage caused by impurities in sludge, and improve the sludge cleaning efficiency of barrel wall.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of environmental protection equipment, in particular to a river silt cleaning and recycling equipment and method. BACKGROUND

[0002] Traditional river dredging methods are difficult to achieve ecological environmental protection, and the beneficial components in the sediment cannot be effectively utilized. Therefore, the treatment and resource utilization of river sediment have become a key link in water environment management.

[0003] There are many researches on river silt cleaning equipment / methods in the prior art, such as Chinese patent document CN111519683A discloses a river silt cleaning and treatment method, which uses a river silt cleaning and treatment device including a mounting frame, a cleaning unit, a conveying unit and a spraying unit. The cleaning unit first disperses the silt, the conveying unit quantitatively conveys the silt from the river, and the spraying unit quickly returns the silt conveyed from the river to the field. This method can clean the water grass in the silt and solve the problem of silt blockage; Chinese patent document CN112900523A discloses a river silt cleaning equipment for water conservancy projects, which includes: a mud pumping device for pumping silt from the river; a filter structure for filtering impurities in the silt; a dewatering structure for dewatering the silt; and a collection structure for collecting dewatered sewage and silt. After the silt is pumped from the river, the filter structure first filters some impurities, then the filtered silt is squeezed in the double-layer tank to remove water, the squeezed water flows into the sewage collection tank outside the double-layer tank, and then the squeezed silt is collected. The collected sewage can be reused.

[0004] However, the existing river silt cleaning mostly uses screen / filter to remove impurities and dewater, and the river silt often contains a large amount of sand and other large impurities. The heavy impurities are easy to damage the screen / filter by vibrating on it, and even the impurities can be stuck inside to affect the normal operation of the equipment. In addition, the silt has poor flowability, and the silt mixed with various impurities is easy to block the screen / filter. Simply using screen / filter to vibrate and remove impurities has poor effect, and the existing centrifugal dewatering equipment needs manual cleaning after dewatering because the sludge is adhered to the barrel wall.

[0005] In order to solve the above problems, it is necessary to develop a river silt cleaning and recycling equipment and method. SUMMARY

[0006] The present application provides a river silt cleaning and recycling equipment, which can solve the problems of easy blockage and damage of the equipment caused by screening silt containing impurities, and easy adhesion of silt to the barrel wall after dewatering which needs manual cleaning.

[0007] The specific technical solution adopted is as follows:

[0008] A cleaning and recycling device for river silt includes a working plane, on which a stone screening unit and a separation unit are provided. Both the stone screening unit and the separation unit are equipped with a filtration device, and the separation unit is also equipped with a wall scraping device.

[0009] The stone screening unit includes a screening frame, several rotating rollers are rotatably installed above the screening frame, and a first collection box is installed below the screening frame; the gaps between the rotating rollers can separate large impurities such as sand and gravel from silt, and the separated silt is collected into the first collection box and then transferred to the separation unit for further dewatering;

[0010] The separation unit includes a collection tank, inside which a separation tank is rotatably installed. The separation tank is equipped with a top cover and has several separation holes. The sludge processed by the stone screening unit enters the separation tank. The separation tank rotates under the action of the driver to dewater the sludge. The separated river water is collected into a second collection tank. The sludge on the tank wall after dewatering is cleaned by a wall scraper.

[0011] Furthermore, the stone screening unit includes a support leg, which is fixedly installed on the working plane. A screening frame is fixedly installed on the support leg, and a baffle is fixedly installed on the screening frame. The baffle is used to control the rolling direction of large impurities such as sand and gravel screened out.

[0012] Furthermore, the stone screening unit also includes a first rotating shaft, with both ends of the first rotating shaft rotatably mounted on baffles, and rotating rollers fixedly mounted on the first rotating shaft. Each end of the first rotating shaft is fixedly mounted with a pulley, and the same transmission belt is fitted onto the pulley. The first rotating shaft rotates under the drive of a first motor.

[0013] Furthermore, the filter device is installed in the first collection box of the stone screening unit, and the filter component includes a filter screen, which is slidably installed in the mounting groove opened in the first collection box.

[0014] Furthermore, a filter element groove is provided inside the separation barrel, and a filter element is installed in the filter element groove. A second rotating shaft is fixedly connected to the bottom of the separation barrel, and the second rotating shaft rotates under the drive of a second motor, which further drives the separation barrel to rotate.

[0015] Furthermore, a first through hole is opened on one side of the collection bucket, and a second through hole is opened on one side of the second collection box. Connecting pipes are fixedly connected to the first and second through holes to realize the recycling of the separated river water.

[0016] Furthermore, the filter device is installed in the second collection box of the separation unit, and the filter components include filter cotton and its auxiliary mounting plate, with the filter cotton installed below the second through hole.

[0017] Furthermore, the wall scraping device includes a first lead screw, which is rotatably mounted inside the separation barrel through the lower bottom surface of the upper cover. A rotating disk is fixedly mounted on the first lead screw, and the first lead screw drives the rotating disk to rotate under the drive of a third motor.

[0018] Furthermore, a fixed rod is fixedly installed inside the separation tank; a movable sleeve is threaded onto the first lead screw, and a fixed hole is opened on the movable sleeve. The fixed rod is installed in the fixed hole, and a rotating sleeve is rotatably installed on the movable sleeve. Scraper rods are fixedly installed on both sides of the rotating sleeve, and limit holes are opened on the scraper rods. A limit rod is fixedly installed on the rotating disk, and the limit rod is movably installed in the limit hole. The cooperation of the movable sleeve, rotating sleeve, limit rod and rotating disk drives the scraper rod to move (which can realize rotation and up and down movement inside the separation tank) to clean the sludge after dewatering from the tank wall.

[0019] The present invention also provides a method for cleaning and recycling river silt, using the aforementioned river silt cleaning and recycling equipment, the method comprising:

[0020] (1) Input the river silt to be treated into the screening unit to achieve preliminary removal of impurities from the river silt;

[0021] (2) Input the river silt after preliminary impurity removal in step (1) into the separation unit to achieve dewatering of the river silt and collect the separated river water and dewatered sludge.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0023] (1) The river silt cleaning and recycling equipment of the present invention is equipped with a stone screening unit. The stone screening unit plays a preliminary role in removing impurities. The river silt to be treated is processed by the stone screening unit. The river water and silt will flow into the collection box below through the gap of the rotating roller. The first motor, in conjunction with the pulley and the transmission belt, drives multiple rotating rollers to rotate to one side, which can transport large impurities that cannot pass through the gap to one side, thereby separating large impurities (sand, gravel, etc.) from silt. This facilitates subsequent centrifugal dewatering using the separation unit, as well as the later recycling and utilization of river water and dewatered sludge.

[0024] (2) The third motor can drive the rotating disk and the first lead screw to rotate. When the first lead screw rotates, the moving sleeve is limited by the fixed rod. The moving sleeve will move up and down on the first lead screw. At the same time, when the rotating disk rotates, the limit rod drives the scraper and the rotating sleeve to rotate on the moving sleeve. Thus, the scraper can rotate in the separation bucket while moving up and down, thereby scraping off the sludge on the bucket wall.

[0025] (3) By installing a filter screen in the first collection box, the present invention can perform the first filtration of the silt after preliminary impurity removal. The filter screen has mesh holes, which can allow sewage and silt to pass through, while intercepting aquatic plants and impurities with a hole diameter larger than the filter screen hole diameter. The river water separated by the separation unit flows into the second collection box through the connecting pipe and will undergo secondary filtration through filter cotton. The filter cotton can filter out even finer impurities. By setting different types of filter cotton, different levels of purification effect can be achieved. Attached Figure Description

[0026] Figure 1 This is a three-dimensional structural diagram of equipment for cleaning and recycling river silt. Figure 1 ;

[0027] Figure 2 This is a three-dimensional structural diagram of equipment for cleaning and recycling river silt. Figure 2 ;

[0028] Figure 3 This is a schematic diagram of the three-dimensional structure of the sieve unit.

[0029] Figure 4 This is a schematic diagram of the structure at the rotating roller;

[0030] Figure 5 This is a structural diagram of the first collection box;

[0031] Figure 6 This is a schematic diagram of the separation unit;

[0032] Figure 7 This is a schematic diagram of the three-dimensional structure of the separated unit.

[0033] Figure 8 yes Figure 7 A magnified structural diagram of part A in the middle;

[0034] Figure 9 This is a schematic diagram of the separation tank;

[0035] Figure 10 This is a schematic diagram of the wall scraping device;

[0036] Figure 11 This is a partial structural diagram of the movable sleeve and the rotating sleeve;

[0037] Figure 12 This is a partial cutaway three-dimensional structural diagram of the collection bucket and the second collection box;

[0038] Figure 13 This is a partial cutaway three-dimensional structural diagram of the second collection box.

[0039] Reference numerals: 1. Working plane; 2. Screening unit; 3. Separation unit; 4. Filtration device; 5. Scraping device; 200. Support leg; 201. First collection box; 202. Screening frame; 203. Baffle; 204. First motor; 205. First rotating shaft; 206. Rotating roller; 207. Pulley; 208. Drive belt; 300. Separation tank; 301. Filter element tank; 302. Filter element; 303. Separation hole; 304. Fixing rod; 305. Top cover; 306. Second motor; 307. Second rotating shaft; 308. Collection tank; 309. Connecting... 310. Connector; 311. First through hole; 312. Rotating hole; 313. Second collection box; 314. Second through hole; 400. Mounting plate; 401. Filter cotton; 402. Replacement cover; 403. Replacement port; 404. Mounting groove; 405. Filter screen; 500. Third motor; 501. Third rotating shaft; 502. First gear; 503. Second gear; 504. First lead screw; 505. Moving sleeve; 506. Fixed hole; 507. Rotating groove; 508. Rotating sleeve; 509. Scraper; 510. Limiting hole; 511. Limiting rod; 512. Rotating disk. Detailed Implementation

[0040] The present invention will be further illustrated below with reference to embodiments and accompanying drawings. The technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0041] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0042] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0043] In the description of the embodiments of the present invention, it should be noted that the terms "inner", "outer", "upper", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the present invention.

[0044] Example 1

[0045] Reference Figures 1-4 , Figure 6 A river silt cleaning and recycling device includes a working plane 1. In order to better screen out impurities in the river silt so that the silt can be classified and recycled in the future, the working plane 1 is provided with a screening unit 2 and a separation unit 3. The separation unit 3 is located on one side of the screening unit 2. Both the separation unit 3 and the screening unit 2 are equipped with a filter device 4. The separation unit 3 is equipped with a wall scraping device 5. Large impurities (such as sand and gravel) in the silt are screened out by the screening unit 2, the water in the silt is further removed by the separation unit 3, and the filtration device 4 performs auxiliary filtration.

[0046] To achieve the function of screening and separating river water and sludge, the screening unit 2 includes a support leg 200, which is fixedly installed on the working plane 1. A screening frame 202 is fixedly installed on the support leg 200. A baffle 203 is fixedly installed on the screening frame 202. A rotating roller 206 is rotatably installed above the screening frame 202. A first collection box 201 is installed below the screening frame 202 and is fixedly installed on the working plane 1. A first rotating shaft 205 is rotatably installed above the screening frame 202. Both ends of the first rotating shaft 205 are rotatably installed on the baffle 203. The rotating roller 206 is fixedly installed on the first rotating shaft 205. A first motor 204 is installed at one end of one of the first rotating shafts 205. A pulley 207 is fixedly installed at the other end of the first rotating shaft 205. The same transmission belt 208 is fitted on the pulley 207.

[0047] The separation unit 3 includes a second collection box 312, which is fixedly installed on the working plane 1. A collection bucket 308 is fixedly installed on the second collection box 312, and a separation bucket 300 is rotatably installed inside the collection bucket 308. A top cover 305 is installed on the separation bucket 300. A rotation hole 311 is opened on the bottom surface of the collection bucket 308, and a first through hole 310 is opened on one side of the collection bucket 308. A filter element groove 301 is opened on the separation bucket 308, and a filter element 302 is installed in the filter element groove 301. A fixing rod 304 is fixedly installed inside the separation tank 300. A second motor 306 is installed at the bottom of the separation tank 300. A second rotating shaft 307 is installed on the second motor 306. The second rotating shaft 307 passes through the rotating hole 311 and is fixedly connected to the bottom of the separation tank 300. Several separation holes 303 are opened on the wall of the separation tank 300. A second through hole 313 is opened on one side of the second collection box 312. The same connecting pipe 309 is fixedly connected to the second through hole 313 and the first through hole 310.

[0048] In use, the river silt to be treated is first poured onto the screening frame 202 near the end of the first motor 204. The first motor 204 drives the first rotating shaft 205 to rotate. When the first rotating shaft 205 is working, it rotates towards the side of the screening frame 202 without baffles. The first rotating shaft 205 drives the remaining rotating rollers 206 to rotate together through the pulley 207 and the transmission belt 208. The silt and river water can flow down through the gaps between the rotating rollers 206. There are holes at the bottom of the screening frame 202, and a first collection box 201 is located below the holes. The silt and sewage will flow into the first collection box 201. Large stones and other impurities that cannot pass through will gradually roll to one side along the rotation of the rotating rollers 206, achieving preliminary impurity removal. The rotating rollers 206 can be made of metal, or a rubber sleeve can be added to protect the metal, as long as it does not affect the gaps between the rotating rollers 206 that allow the silt to flow. The silt that has been preliminarily screened falls into the first collection box 201 and is preliminarily filtered by the filter device 4 inside the first collection box 201 (filtering aquatic plants, etc.). After removing impurities, the sludge is pumped into the separation tank 300 by an external pump. A filter element 302 is pre-installed in the separation tank 300 and is movably installed in the filter element groove 301 for replacement. After filling with sludge, the top cover 305 is closed. The top cover 305 is equipped with latches and other features to lock it securely to the separation tank 300. When installing the top cover 305, the fixing rod 304 needs to be aligned with the fixing hole 506 and inserted for subsequent wall scraping. Then, the second motor 306 drives the second rotating shaft 307 to rotate rapidly. The rotating shaft 307 drives the separation tank 300 to rotate. The sludge in the separation tank 300 is thrown onto the tank wall under centrifugal force. Water is thrown out through the separation hole 303 and hits the collection tank 308. After being intercepted by the collection tank 308, the sewage flows to the bottom under gravity and flows into the second collection box 312 through the connecting pipe 309. After being filtered by the filter device 4 in the second collection box 312, relatively clean river water is obtained. At this time, the sludge in the separation tank 300 loses water and becomes relatively dry sludge.

[0049] Furthermore, refer to Figures 7-11To facilitate the cleaning of sludge adhering to the barrel wall after dehydration, the scraping device 5 includes a third motor 500, which is fixedly installed inside the upper cover 305. A third rotating shaft 501 is mounted on the third motor 500, and a first gear 502 is fixedly mounted on the third rotating shaft 501. The first gear 502 meshes with a second gear 503, and a first lead screw 504 is fixedly mounted at the bottom of the second gear 503. The first lead screw 504 passes through the upper cover 305 and is rotatably mounted inside the separation barrel 300. A rotating disk 512 is fixedly mounted on the first lead screw 504 and is installed above the separation barrel 300. A movable sleeve 505 is threaded onto the first lead screw 504. A fixing hole 506 is formed on the movable sleeve 505, and a fixing rod 304 is installed inside the fixing hole 506. A rotating groove 507 is formed on the movable sleeve 505, and a rotating sleeve 508 is rotatably installed inside the rotating groove 507. Scraper rods 509 are fixedly installed on both sides of the rotating sleeve 508, and limit holes 510 are formed on the scraper rods 509. A limit rod 511 is fixedly installed on the rotating disk 512, and the limit rod 511 is movably installed inside the limit hole 510. Because the sludge adheres to the wall of the separation tank 300 due to its movement within the separation tank, after the second motor 306 is stopped, the third motor... The machine 500 drives the third rotating shaft 501 to rotate, which in turn drives the first gear 502 and the second gear 503 to rotate. When the second gear 503 rotates, it drives the first lead screw 504 and the rotating disk 512 to rotate. The rotating disk 512 is fixed to the first lead screw 504. When the first lead screw 504 rotates, the movable sleeve 505 has a matching thread, but it is restricted from rotating by the fixed rod 304. Therefore, the movable sleeve 505 moves up and down on the first lead screw 504. The rotating disk 512 pushes the scraper rod 509 to rotate via the limiting rod 511. The scraper rod 509 is fixed to... On the rotating sleeve 508, the rotating sleeve 508 and the movable sleeve 505 are not fixed. The rotating sleeve 508 can rotate on the movable sleeve 505. One end of the scraper 509 contacts the barrel wall. When the scraper 509 rotates, it can scrape off the sludge on the barrel wall. In conjunction with the up and down movement of the movable sleeve 505, the scraper 509 can move up and down at the same time as rotating, thereby scraping off the sludge in the inner ring of the barrel wall. According to the height inside the separation barrel 300, the number of rotations and the direction of rotation of the third motor 500 and the third rotating shaft 501 are controlled by external equipment, so that the movement range of the movable sleeve 505 is the up and down movement of the first lead screw 504.

[0050] Reference Figure 5 , Figures 12-13For sorting and filtration, a filter device 4 is installed in the first collection box 201 of the screening unit 2. Specifically, the first collection box 201 has an installation groove 404, in which a filter screen 405 is slidably installed. This configuration allows for the first filtration of the screened sludge. The filter screen 405 has mesh openings that allow wastewater and sludge to pass through, while intercepting aquatic plants and impurities with pore sizes larger than the mesh size of the filter screen 405. A filter device 4 is installed in the second collection box 312 of the separation unit 3. Specifically, an installation plate 400 is installed in the second collection box 312, below the second through hole 313. Filter cotton 401 is installed on the installation plate 400. A replacement port 403 is opened on one side of the second collection box 312, in which a replacement cover 402 is rotatably installed. The corresponding settings can achieve better filtration effect. The river water collected by the collection bucket 308 flows into the second collection box 312 through the connecting pipe 309 and undergoes secondary filtration through the filter cotton 401. The filter cotton 401 can filter out finer impurities. By setting different types of filter cotton 401, different levels of purification effect can be achieved. For example, physical filter cotton 401 can filter impurities, and adding biochemical materials inside it can achieve biological filtration and other functions.

[0051] Working principle: In use, river silt is first poured onto the screening frame 202 near the end of the first motor 204. The first motor 204 drives the first rotating shaft 205 to rotate. When the first rotating shaft 205 is working, it rotates towards the side of the screening frame 202 without baffles. The first rotating shaft 205 drives the remaining rotating rollers 206 to rotate together through the pulley 207 and the transmission belt 208. The silt and river water can flow down through the gaps between the rotating rollers 206. There are holes at the bottom of the screening frame 202, and a first collection box 201 is located below the holes. The silt and sewage will flow into the first collection box 201. Large stones and other impurities that cannot pass through will gradually roll to one side along the rotation of the rotating rollers 206, achieving preliminary impurity removal. The rotating rollers 206 can be made of metal or... A protective sleeve is fitted over the metal outer layer, ensuring that there are gaps between the rotating rollers 206 to allow for sludge flow. The initially screened sludge falls into the first collection box 201 and is then pumped into the separation tank 300 by an external pump. A filter element 302 is pre-installed in the separation tank 300 and is replaceable as it is movably installed in the filter element slot 301. After filling with sludge, the top cover 305 is closed. The top cover 305 is equipped with latches to lock it into the separation tank 300. When installing the top cover 305, the fixing rod 304 needs to be aligned with the fixing hole 506 and inserted. Then, the second motor 306 drives the second rotating shaft 307 to rotate rapidly. The second rotating shaft 307 rotates the separation tank 300, and the sludge inside the separation tank 300 is thrown against the tank wall under centrifugal force. Water is thrown out through the separation hole 303 and impacts the collection bucket 308. After being intercepted by the collection bucket 308, the sewage flows to the bottom under gravity and flows into the second collection box 312 through the connecting pipe 309. After being filtered by the filter device 4 in the second collection box 312, relatively clean river water is obtained. At this time, the silt in the separation bucket 300 loses water and becomes relatively dry sludge. Because the sludge is thrown in the separation bucket 300, it sticks to the bucket wall. After the second motor 306 is stopped, the third motor 500 drives the third rotating shaft 501 to rotate. The third rotating shaft 501 drives the first gear 502 and the second gear 503 to rotate. When the second gear 503 rotates, it drives the first lead screw 504 and the rotating disk 512 to rotate. The rotating disk 512 is fixed on On the first lead screw 504, when the first lead screw 504 rotates, both the first lead screw 504 and the movable sleeve 505 have matching threads. The movable sleeve 505 is restricted from rotating by the fixed rod 304, so the movable sleeve 505 moves up and down on the first lead screw 504. The rotating disk 512 pushes the scraper 509 to rotate through the limiting rod 511. The scraper 509 is fixed on the rotating sleeve 508, but the rotating sleeve 508 and the movable sleeve 505 are not fixed. The rotating sleeve 508 can rotate on the movable sleeve 505. One end of the scraper 509 contacts the barrel wall. When the scraper 509 rotates, it can scrape off the sludge on the barrel wall. In conjunction with the up and down movement of the movable sleeve 505, the scraper 509 can move up and down while rotating, thereby scraping off the sludge on the inner ring of the barrel wall.Based on the height within the separation tank 300, the rotation number and direction of the third motor 500 and the third rotating shaft 501 are controlled by external equipment, allowing the moving sleeve 505 to move up and down within the first lead screw 504. To achieve better filtration, the filter screen 405 is installed inside the first collection box 201 to perform the first filtration of the screened sludge. The filter screen 405 has mesh openings, allowing sewage and sludge to pass through while intercepting aquatic plants and impurities with pore sizes larger than the filter screen 405. The river water separated by the separation unit 3 flows through the connecting pipe 309 into the second collection box 312, where it undergoes secondary filtration through the filter cotton 401. The filter cotton 401 can filter even finer impurities. By setting different types of filter cotton 401, different levels of purification effects can be achieved. For example, using physical filter cotton 401 can filter impurities, while adding biochemical materials can achieve biological filtration.

[0052] The above embodiments provide a detailed description of the technical solution of the present invention. It should be understood that the above descriptions are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, additions, or similar substitutions made within the scope of the principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A cleaning and recycling device for river silt, comprising a working plane (1), characterized in that, The working plane (1) is provided with a stone screening unit (2) and a separation unit (3). Both the stone screening unit (2) and the separation unit (3) are provided with a filter device (4). The separation unit (3) is also provided with a wall scraping device (5). The screening unit (2) includes a screening frame (202), several rotating rollers (206) are rotatably installed above the screening frame (202), and a first collection box (201) is installed below the screening frame (202); the gaps between the rotating rollers (206) can separate large impurities and silt, and the separated silt is collected into the first collection box (201) and then transferred to the separation unit (3) for further dewatering; The separation unit (3) includes a collection tank (308), and a separation tank (300) is rotatably installed inside the collection tank (308). The separation tank (300) is equipped with a top cover (305) and has several separation holes (303). The sludge after being processed by the stone screening unit (2) enters the separation tank (300). The separation tank (300) rotates under the action of the driver to dewater the sludge. The separated river water is collected into the second collection box (312). The sludge on the wall of the dewatered tank is cleaned by the wall scraping device (5). The stone screening unit (2) also includes a first rotating shaft (205), both ends of which are rotatably mounted on the baffle (203). A rotating roller (206) is fixedly mounted on the first rotating shaft (205). A pulley (207) is fixedly mounted on one end of each first rotating shaft (205). The same transmission belt (208) is fitted on the pulley (207). The first rotating shaft (205) rotates under the drive of the first motor (204). The scraping device (5) includes a first lead screw (504), which passes through the bottom surface of the upper cover (305) and is rotatably installed in the separation bucket (300). A rotating disk (512) is fixedly installed on the first lead screw (504). The first lead screw (504) drives the rotating disk (512) to rotate under the drive of the third motor (500). A fixed rod (304) is fixedly installed inside the separation bucket (300); a movable sleeve (505) is threadedly connected to the first lead screw (504), a fixed hole (506) is opened on the movable sleeve (505), the fixed rod (304) is installed in the fixed hole (506), a rotating sleeve (508) is rotatably installed on the movable sleeve (505), a scraper (509) is fixedly installed on both sides of the rotating sleeve (508), a limit hole (510) is opened on the scraper (509), a limit rod (511) is fixedly installed on the rotating disk (512), and the limit rod (511) is movably installed in the limit hole (510). The scraper (509) is driven to move and clean the sludge after dewatering from the bucket wall by the cooperation of the movable sleeve (505), the rotating sleeve (508), the limit rod (511) and the rotating disk (512).

2. The river silt cleaning and recycling equipment according to claim 1, characterized in that, The stone screening unit (2) includes a support leg (200), which is fixedly installed on the working plane (1). A screening frame (202) is fixedly installed on the support leg (200), and a baffle (203) is fixedly installed on the screening frame (202). The baffle is used to control the rolling direction of the large impurities screened out.

3. The river silt cleaning and recycling equipment according to claim 1, characterized in that, The filter device (4) is installed in the first collection box (201) of the stone sieve unit (2). The filter component includes a filter screen (405), which is slidably installed in the mounting groove (404) opened in the first collection box (201).

4. The river silt cleaning and recycling equipment according to claim 1, characterized in that, The separation tank (300) also has a filter element groove (301) inside, and a filter element (302) is installed in the filter element groove (301). A second rotating shaft (307) is fixedly connected to the bottom of the separation tank (300). The second rotating shaft (307) rotates under the drive of the second motor (306) to further drive the separation tank (300) to rotate.

5. The river silt cleaning and recycling equipment according to claim 1, characterized in that, The collection bucket (308) has a first through hole (310) on one side, and the second collection box (312) has a second through hole (313) on one side. A connecting pipe (309) is fixedly connected inside the first through hole (310) and the second through hole (313).

6. The river silt cleaning and recycling equipment according to claim 5, characterized in that, The filter device (4) is installed in the second collection box (312) of the separation unit (3). The filter components include filter cotton (401) and its auxiliary mounting plate (400). The filter cotton (401) is installed below the second through hole (313).

7. A method for cleaning and recycling river silt, characterized in that, The method using the river silt cleaning and recycling equipment according to any one of claims 1-6 comprises: (1) Input the river silt to be treated into the screening unit (2) to achieve preliminary removal of impurities from the river silt; (2) Input the river silt after preliminary impurity removal in step (1) into the separation unit (3) to achieve dewatering of the river silt and collect the separated river water and dewatered sludge.

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