Cleaning and recycling equipment and method for river silt

Abstract

The invention discloses cleaning and recycling equipment and method for river silt, and belongs to the field of environmental protection equipment, the equipment comprises a working plane, a stone screening unit and a separating unit are arranged on the working plane, filtering devices are arranged in the stone screening unit and the separating unit, and a wall scraping device is arranged in the separating unit; the stone screening unit comprises a screening frame, a plurality of rotating rollers are rotationally installed above the screening frame, gaps between the rotating rollers can achieve separation of large impurities such as gravel and sludge, and the separated sludge is transferred to the separation unit to be further dehydrated; the separating unit comprises a collecting barrel, a separating barrel is rotatably mounted in the collecting barrel, the sludge treated by the stone screening unit enters the separating barrel, and the separating barrel rotates under the action of a driver to dehydrate the sludge; and the separated river water is collected, and sludge on the dewatered barrel wall is cleaned through a wall scraping device. The equipment can solve the problems of equipment blockage and damage caused by impurities in sludge, and the barrel wall sludge cleaning efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of environmental protection equipment, and in particular to equipment and a method for cleaning and recovering river sludge. Background Art

[0002] With the development of industrialization and urbanization, harmful substances such as heavy metals, organic pollutants, and nitrogen and phosphorus compounds may accumulate in riverbed mud. These pollutants may be released into the water body when the water environment conditions change, seriously threatening water quality and ecological safety. Riverbed mud cleaning and recycling is not only an important means to improve the river water environment, but also has important significance for improving flood control capabilities, ensuring smooth navigation, and promoting sustainable development. Traditional riverbed dredging methods are difficult to achieve ecological protection, and the beneficial components in the mud cannot be effectively utilized. Therefore, the treatment and resource utilization of riverbed mud have become a key link in water environment governance.

[0003] A number of studies on river channel silt cleaning equipment / methods have been reported in the prior art. For example, Chinese patent document with publication number CN111519683A discloses a river channel management silt cleaning and processing method, which utilizes river channel management silt cleaning and processing equipment including a mounting frame, a cleaning unit, a conveying unit and a spraying unit. The cleaning unit first disperses the silt, the conveying unit can quantitatively convey the silt out of the river channel, and the spraying unit can quickly return the silt conveyed from the river channel to the field. This method can clean aquatic plants in the silt and solve the problem of silt blockage; Chinese patent document with publication number CN112900523A discloses a river channel silt cleaning equipment for water conservancy projects, which includes: a sludge extraction device for extracting silt from a river channel; a filtering structure for filtering impurities in the silt; a dewatering structure for dehydrating the silt; and a collecting structure for collecting the sewage and silt after dehydration respectively. After the equipment extracts the silt from the river channel, it first filters some impurities through a filtering structure, and then squeezes the water out of the filtered silt in a double-layer box. The squeezed water enters the outside of the double-layer box and flows into the sewage collection tank. The squeezed silt is then collected and the collected sewage can be reused.

[0004] However, most of the existing river sludge cleaning uses screens / filters for impurity removal and dehydration, and river sludge often contains a large amount of large impurities such as sand and gravel. The heavier impurities are likely to cause damage to the screen / filter due to vibration on it, and the impurities may even get stuck inside it and affect the normal operation of the equipment. At the same time, the sludge has poor fluidity, and the sludge mixed with various impurities is likely to cause the screen / filter to be blocked. The effect of simply using the screen / filter to vibrate and remove impurities is poor. In addition, after dehydration, the sludge in the existing centrifugal dehydration equipment will adhere to the barrel wall and need to be cleaned manually.

[0005] In order to solve the above problems, it is necessary to develop a river sludge cleaning and recovery device and method. Summary of the invention

[0006] The invention provides a river sludge cleaning and recovery device, which can solve the problems that screening out sludge containing impurities easily leads to equipment blockage and damage, and that the sludge easily sticks to the barrel wall after dehydration and requires manual cleaning.

[0007] The specific technical solutions adopted are as follows:

[0008] A river sludge cleaning and recovery device comprises a working plane, a stone screening unit and a separation unit are arranged on the working plane, a filtering device is arranged in the stone screening unit and the separation unit, and a wall scraping device is also arranged in the separation unit;

[0009] The stone screening unit includes a screening frame, a plurality of rotating rollers are rotatably installed on the top of the screening frame, and a first collecting 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 in the first collecting box and then transferred to the separation unit for further dehydration;

[0010] The separation unit includes a collecting barrel, in which a separation barrel is rotatably installed. The separation barrel is equipped with an upper cover and has a plurality of separation holes. The sludge treated by the stone screening unit enters the separation barrel, and the separation barrel rotates under the action of a driver to dehydrate the sludge. The separated river water is collected in a second collecting box, and the sludge on the barrel wall after dehydration is cleaned by a scraping device.

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

[0012] Furthermore, the stone screening unit also includes a first rotating shaft, both ends of which are rotatably mounted on the baffle, and the rotating roller is fixedly mounted on the first rotating shaft. A pulley is fixedly mounted at one end of each first rotating shaft, and the same transmission belt is mounted on the pulley. The first rotating shaft rotates under the drive of the first motor.

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

[0014] Furthermore, a filter element groove is opened in 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 the second motor to further drive the separation barrel to rotate.

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

[0016] Furthermore, the filter device is installed in the second collecting box of the separation unit, and the filter component includes filter cotton and an auxiliary mounting plate thereof, and the filter cotton is installed below the second through hole.

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

[0018] Furthermore, a fixed rod is fixedly installed in the separation barrel; a movable sleeve is threadedly connected to the first screw rod, a fixing hole is opened on the movable sleeve, the fixed rod is installed in the fixing hole, a rotating sleeve is rotatably installed on the movable sleeve, scraping rods are fixedly installed on both sides of the rotating sleeve, the scraping rods are opened with limiting holes, the limiting rods are fixedly installed on the rotating disk, and the limiting rods are movably installed in the limiting holes; the scraping rods are driven to move (rotation and up and down movement in the separation barrel can be realized) through the cooperation of the movable sleeve, the rotating sleeve, the limiting rod and the rotating disk to clean the sludge after dehydration from the barrel wall.

[0019] The present invention also provides a method for cleaning and recovering river sludge, using the cleaning and recovering equipment for river sludge, the method comprises:

[0020] (1) Inputting the river sludge to be treated into the stone screening unit to achieve preliminary impurity removal of the river sludge;

[0021] (2) The river sludge after preliminary impurity removal in step (1) is input into a separation unit to dehydrate the river sludge, and the separated river water and the dehydrated sludge are collected.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] (1) The river sludge cleaning and recovery equipment of the present invention is provided with a stone screening unit, which plays a role of preliminary impurity removal. The river sludge to be treated is treated with the stone screening unit, and the river water and sludge flow through the gaps of the rotating rollers to the collection box below. The first motor cooperates with the pulley and the transmission belt to drive the multiple rotating rollers to rotate to one side, which can transport large impurities that cannot pass through the gaps to one side, thereby separating the large impurities (sand and gravel, etc.) from the sludge, making it convenient for the subsequent use of the separation unit for centrifugal dehydration, as well as the later recovery and utilization of the river water and the dehydrated sludge.

[0024] (2) The third motor can drive the rotating disk and the first screw to rotate. When the first screw rotates, the movable sleeve is limited by the fixed rod, and the movable sleeve moves up and down on the first screw. At the same time, when the rotating disk rotates, the limiting rod drives the scraper rod and the rotating sleeve to rotate on the movable sleeve, so that the scraper rod can rotate in the separation barrel while moving up and down, so that the sludge on the barrel wall can be scraped off by the scraper rod.

[0025] (3) The present invention can perform a first filtration on the sludge after preliminary impurity removal by installing a filter in the first collection box. The filter is provided with mesh holes that allow sewage and sludge to pass through, while intercepting aquatic plants and impurities with a pore size larger than that of the filter. The river water separated by the separation unit flows into the second collection box through a connecting pipe and is filtered twice through filter cotton. The filter cotton can filter even finer impurities. By setting different types of filter cotton, different levels of purification effects can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0028] Figure 3 It is a schematic diagram of the three-dimensional structure of the sieve stone unit;

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

[0030] Figure 5 is a schematic diagram of the structure of the first collection box;

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

[0032] Figure 7 It is a schematic diagram of the three-dimensional structure of the separation unit;

[0033] Figure 8 yes Figure 7 A schematic diagram of the enlarged structure of part A;

[0034] Fig. 9 It is a schematic diagram of the structure of the separation barrel;

[0035] Fig.10 It is a schematic diagram of the structure of the wall scraper device;

[0036] Fig.11 It is a schematic diagram of the local structure of the moving sleeve and the rotating sleeve;

[0037] Fig.12It is a partially cutaway three-dimensional structural schematic diagram of the collection barrel and the second collection box;

[0038] Fig.13 It is a partially cutaway schematic diagram of the three-dimensional structure of the second collection box.

[0039] Figure numerals: 1, working plane; 2, stone screening unit; 3, separation unit; 4, filtering device; 5, scraping device; 200, supporting leg; 201, first collecting box; 202, screening frame; 203, baffle; 204, first motor; 205, first rotating shaft; 206, rotating roller; 207, pulley; 208, driving belt; 300, separation barrel; 301, filter element slot; 302, filter element; 303, separation hole; 304, fixing rod; 305, upper cover; 306, second motor; 307, second rotating shaft; 308, collecting barrel; 309, connecting rod Take over; 310, first through hole; 311, rotating hole; 312, second collecting box; 313, second through hole; 400, mounting plate; 401, filter cotton; 402, replacement cover; 403, replacement port; 404, mounting slot; 405, filter screen; 500, third motor; 501, third rotating shaft; 502, first gear; 503, second gear; 504, first screw rod; 505, movable sleeve; 506, fixed hole; 507, rotating slot; 508, rotating sleeve; 509, scraper rod; 510, limit hole; 511, limit rod; 512, rotating disk. DETAILED DESCRIPTION

[0040] The present invention is further explained below in conjunction with the embodiments and drawings, and the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0041] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In addition, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0043] In the description of the embodiments of the present invention, it should be noted that the terms "inside", "outside", "upper", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is usually placed when used. 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, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0044] Example 1

[0045] Reference Figure 1-Figure 4 , Figure 6 A river sludge cleaning and recycling device comprises a working plane 1. In order to better screen out impurities in the river sludge so as to classify and recycle the sludge later, a stone screening unit 2 and a separation unit 3 are provided on the working plane 1. The separation unit 3 is located on one side of the stone screening unit 2. Both the separation unit 3 and the stone screening unit 2 are provided with a filtering device 4. The separation unit 3 is provided with a wall scraping device 5. The large impurities (sand and gravel, etc.) in the sludge are screened out by the stone screening unit 2, and the moisture in the sludge is further removed by the separation unit 3, and auxiliary filtering is performed by the filtering device 4.

[0046] In order to realize the function of screening and separating river water and sludge, the stone screening unit 2 includes a supporting leg 200, which is fixedly mounted on the working plane 1, and a screening frame 202 is fixedly mounted on the supporting leg 200, and a baffle 203 is fixedly mounted on the screening frame 202. A rotating roller 206 is rotatably mounted above the screening frame 202, and a first collecting box 201 is installed below the screening frame 202. The first collecting box 201 is fixedly mounted on the working plane 1, and a first rotating shaft 205 is rotatably mounted above the screening frame 202. Both ends of the first rotating shaft 205 are rotatably mounted on the baffle 203, and the rotating roller 206 is fixedly mounted on the first rotating shaft 205. A first motor 204 is mounted on one end of one of the first rotating shafts 205, and a pulley 207 is fixedly mounted on the other end of the first rotating shaft 205, and the pulley 207 is sleeved with the same transmission belt 208.

[0047] The separation unit 3 includes a second collection box 312, which is fixedly mounted on the working plane 1, a collection barrel 308 is fixedly mounted on the second collection box 312, a separation barrel 300 is rotatably mounted in the collection barrel 308, an upper cover 305 is mounted on the separation barrel 300, a rotation hole 311 is opened on the bottom surface of the collection barrel 308, a first through hole 310 is opened on one side of the collection barrel 308, a filter element slot 301 is opened on the separation barrel 300, and a filter element 302 is installed in the filter element slot 301 A fixing rod 304 is fixedly installed in the separation barrel 300, a second motor 306 is installed at the bottom of the separation barrel 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 barrel 300, a plurality of separation holes 303 are opened on the barrel wall of the separation barrel 300, a second through hole 313 is opened on one side of the second collecting box 312, and the second through hole 313 and the first through hole 310 are fixedly connected with the same connecting pipe 309.

[0048] When in use, first pour the river silt to be processed onto the screening frame 202 near one end of the first motor 204, the first motor 204 drives the first rotating shaft 205 to rotate, and the first rotating shaft 205 rotates toward the side of the screening frame 202 without a baffle when working, and the first rotating shaft 205 drives the remaining rotating rollers 206 to rotate together through the pulley 207 and the transmission belt 208, and the silt and river water can flow to the bottom through the gap between the rotating rollers 206. A hole is opened at the bottom of the screening frame 202, and a first collecting box 201 is arranged below the hole, and the silt and sewage will flow into the first collecting box 201, and large impurities such as stones that cannot pass through will gradually roll to one side along the rotation of the rotating roller 206 to achieve preliminary impurity removal, the rotating roller 206 can be made of metal, or a rubber sleeve can be set on the outer layer of the metal for protection, as long as there is a gap between the rotating rollers 206 that allows the silt to flow, the preliminarily screened silt falls into the first collecting box 201, and is preliminarily filtered (filtering water plants, etc.) by the filtering device 4 in the first collecting box 201. After impurities are removed, the sludge is transported to the separation barrel 300 through an external pump. A filter element 302 is pre-installed in the separation barrel 300. The filter element 302 is movably installed in the filter element slot 301 and can be replaced. After filling the sludge, the upper cover 305 is closed. The upper cover 305 is provided with a lock buckle, etc., which can be locked with the separation barrel 300. When installing the upper cover 305, the fixing rod 304 needs to be aligned with the fixing hole 506 and inserted for subsequent wall scraping. Subsequently, the second motor 306 drives the second rotating shaft 307 to rotate rapidly, and the second The rotating shaft 307 drives the separation barrel 300 to rotate, and the sludge in the separation barrel 300 will be thrown onto the barrel wall under centrifugal force, and the water will be thrown out through the separation hole 303 and hit the collection barrel 308. After the sewage hits the collection barrel 308 and is intercepted, it will flow to the bottom under gravity and flow 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 can be obtained. At this time, the sludge in the separation barrel 300 is freed of water and becomes relatively dry sludge.

[0049] Further, see Figure 7-Figure 11In order to facilitate the cleaning of the sludge stuck to the barrel wall after dehydration, the scraper device 5 includes a third motor 500, which is fixedly installed in the upper cover 305. The third motor 500 is equipped with a third rotating shaft 501, and a first gear 502 is fixedly installed on the third rotating shaft 501. The first gear 502 is meshed with a second gear 503. A first screw rod 504 is fixedly installed at the bottom of the second gear 503. The first screw rod 504 passes through the upper cover 305 and is rotatably installed in the separation barrel 300. A rotating disk 512 is fixedly installed on the first screw rod 504, and the rotating disk 512 is installed above the separation barrel 300. , a movable sleeve 505 is threadedly connected to the first screw rod 504, a fixing hole 506 is opened on the movable sleeve 505, and the fixing rod 304 is installed in the fixing hole 506, a rotating groove 507 is opened on the movable sleeve 505, and a rotating sleeve 508 is rotatably installed in the rotating groove 507, and scraping rods 509 are fixedly installed on both sides of the rotating sleeve 508, and a limiting hole 510 is opened on the scraping rod 509. A limiting rod 511 is fixedly installed on the rotating disk 512, and the limiting rod 511 is movably installed in the limiting hole 510. Since the sludge is swung in the separation barrel 300 and sticks to the barrel wall, after stopping the second motor 306, the third motor 306 is used to move the sludge to the separation barrel 300. The machine 500 drives the third rotating shaft 501 to rotate, and 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 screw rod 504 and the rotating disk 512 to rotate. The rotating disk 512 is fixed to the first screw rod 504. When the first screw rod 504 rotates, a matching thread is opened on the movable sleeve 505, but the movable sleeve 505 is restricted by the fixed rod 304 and cannot rotate, so that the movable sleeve 505 moves up and down on the first screw rod 504. The rotating disk 512 drives the scraper rod 509 to rotate through the limit rod 511, and the scraper rod 509 is fixed to On the rotating sleeve 508, the rotating sleeve 508 and the movable sleeve 505 are not fixed, and the rotating sleeve 508 can rotate on the movable sleeve 505. One end of the scraper rod 509 is in contact with the barrel wall. The scraper rod 509 can scrape off the sludge on the barrel wall when rotating. In conjunction with the up and down movement of the movable sleeve 505, the scraper rod 509 can also move up and down while rotating, thereby scraping off the sludge on the inner circle of the barrel wall. According to the height in the separation barrel 300, the number of revolutions and the rotation direction 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 to move up and down on the first screw rod 504.

[0050] Reference Figure 5 , Figure 12-13In order to carry out sorting and filtering, a filter device 4 is installed in the first collection box 201 of the stone screening unit 2. Specifically, the first collection box 201 is provided with a mounting groove 404, and a filter screen 405 is slidably installed in the mounting groove 404. The corresponding setting can perform the first filtration on the screened sludge. The filter screen 405 is provided with mesh holes, which can allow sewage and sludge to pass through, and intercept water plants and impurities with a pore size larger than that of the filter screen 405. A filter device 4 is installed in the second collection box 312 of the separation unit 3. Specifically, a mounting plate 400 is installed in the second collection box 312, and the mounting plate 400 is installed below the second through hole 313. A filter cotton 401 is installed on the mounting plate 400. A replacement port 403 is provided on one side of the second collection box 312, and a replacement cover 402 is rotatably installed in the replacement port 403. The corresponding settings can achieve better filtering effects. The river water collected in the collection barrel 308 flows into the second collection box 312 through the connecting pipe 309 and is filtered twice 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 effects can be achieved. For example, using physical filter cotton 401 can filter out impurities, and adding biochemical materials inside it can achieve functions such as biological filtration.

[0051] Working principle: When in use, first pour the river silt onto the screening frame 202 near one 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 toward the side of the screening frame 202 where the baffle is not provided. 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 to the bottom through the gap between the rotating rollers 206. A hole is opened at the bottom of the screening frame 202, and a first collecting box 201 is arranged below the hole. The silt and sewage will flow into the first collecting box 201. Impurities such as large stones that cannot pass through will gradually roll to one side along the rotation of the rotating roller 206 to achieve preliminary impurity removal. The rotating roller 206 can be made of metal, or it can be made of metal. The outer metal layer is protected by a rubber sleeve. As long as there is a gap between the rotating rollers 206 that allows the sludge to flow, the initially screened sludge falls into the first collecting box 201, and the sludge is transported to the separation barrel 300 through an external pump. A filter element 302 is pre-installed in the separation barrel 300, and the filter element 302 is movably installed in the filter element slot 301 and can be replaced. After filling the sludge, the upper cover 305 is closed. The upper cover 305 is provided with a lock that can be locked with the separation barrel 300. When installing the upper 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, and the second rotating shaft 307 drives the separation barrel 300 to rotate. The sludge in the separation barrel 300 will be thrown to the barrel wall under centrifugal force. The water will be thrown out through the separation hole 303 and hit the collection barrel 308. After the sewage hits the collection barrel 308 and is intercepted, it will flow to the bottom under gravity and flow 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 barrel 300 is freed of water and becomes relatively dry sludge. Since the sludge is swung in the separation barrel 300 and sticks to the barrel wall, after the second motor 306 is stopped, the third shaft 501 is driven to rotate by the third motor 500, and the third shaft 501 drives the first gear 502 and the second gear 503 to rotate. When the second gear 503 rotates, it drives the first screw rod 504 and the rotating disk 512 to rotate. The rotating disk 512 is fixed on On the first screw rod 504, when the first screw rod 504 rotates, the first screw rod 504 and the movable sleeve 505 are provided with matching threads, and the movable sleeve 505 is restricted by the fixed rod 304 and cannot rotate, so that the movable sleeve 505 moves up and down on the first screw rod 504, and the rotating disk 512 pushes the scraper rod 509 to rotate through the limit rod 511, and the scraper rod 509 is fixed on the rotating sleeve 508, and the rotating sleeve 508 and the movable sleeve 505 are not fixed, and the rotating sleeve 508 can rotate on the movable sleeve 505, and one end of the scraper rod 509 contacts the barrel wall, and the scraper rod 509 can scrape off the sludge on the barrel wall when rotating, and cooperate with the up and down movement of the movable sleeve 505, The scraper rod 509 can also move up and down while rotating, so that the sludge on the inner circle of the barrel wall is scraped off.According to the height in the separation barrel 300, the number of revolutions 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 to move up and down on the first screw rod 504. In order to achieve a better filtering effect, the sludge after screening can be filtered for the first time by installing the filter screen 405 in the first collection box 201. The filter screen 405 has mesh holes, which can allow sewage and sludge to pass through, and intercept water plants and impurities with a larger aperture than the filter screen 405. The river water separated by the separation unit 3 flows into the second collection box 312 through the connecting pipe 309 and passes through the filter cotton 401 for secondary filtration. The filter cotton 401 can filter finer impurities. By setting different types of filter cotton 401, different levels of purification effects can be achieved. For example, the use of physical filter cotton 401 can filter impurities, and adding biochemical materials inside it can achieve functions such as biological filtration.

[0052] The above-described embodiments provide a detailed description of the technical solutions 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, supplements or similar substitutions made within the scope of the principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A river sludge cleaning and recovery device, 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 filtering device (4), and the separation unit (3) is also provided with a wall scraping device (5); The stone screening unit (2) comprises a screening frame (202), a plurality of rotating rollers (206) are rotatably mounted above the screening frame (202), and a first collecting box (201) is mounted below the screening frame (202); the gaps between the rotating rollers (206) can separate large impurities and sludge, and the separated sludge is collected in the first collecting box (201) and then transferred to the separation unit (3) for further dehydration; The separation unit (3) comprises a collecting barrel (308), in which a separation barrel (300) is rotatably mounted. The separation barrel (300) is equipped with an upper cover (305) and is provided with a plurality of separation holes (303). The sludge processed by the stone screening unit (2) enters the separation barrel (300), and the separation barrel (300) rotates under the action of a driver to dehydrate the sludge. The separated river water is collected in a second collecting box (312), and the sludge on the barrel wall after dehydration is cleaned by a wall scraping device (5).

2. The river sludge cleaning and recovery equipment according to claim 1 is characterized in that: The stone screening unit (2) comprises a support leg (200), the support leg (200) being fixedly mounted on the working plane (1), a screening frame (202) being fixedly mounted on the support leg (200), a baffle (203) being fixedly mounted on the screening frame (202), and the baffle being used to control the rolling direction of the screened large impurities.

3. The river sludge cleaning and recovery equipment according to claim 1 is characterized in that: The stone screening unit (2) further comprises 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), one end of each first rotating shaft (205) is fixedly mounted with a pulley (207), the pulley (207) is sleeved with a same transmission belt (208), and the first rotating shaft (205) is driven to rotate by a first motor (204).

4. The river sludge cleaning and recovery equipment according to claim 1 is characterized in that: The filtering device (4) is installed in the first collecting box (201) of the stone screening unit (2), and the filtering component includes a filtering net (405), and the filtering net (405) is slidably installed in a mounting groove (404) opened in the first collecting box (201).

5. The river sludge cleaning and recovery equipment according to claim 1 is characterized in that: The separation barrel (300) is also provided with a filter element groove (301), in which a filter element (302) is installed. A second rotating shaft (307) is fixedly connected to the bottom of the separation barrel (300), and the second rotating shaft (307) rotates under the drive of the second motor (306), thereby further driving the separation barrel (300) to rotate.

6. The river sludge cleaning and recovery equipment according to claim 1 is characterized in that: A first through hole (310) is formed on one side of the collection barrel (308), a second through hole (313) is formed on one side of the second collection box (312), and a connecting pipe (309) is fixedly connected inside the first through hole (310) and the second through hole (313).

7. The river sludge cleaning and recovery equipment according to claim 1 is characterized in that: The filter device (4) is installed in the second collection box (312) of the separation unit (3), and the filter component includes filter cotton (401) and its auxiliary mounting plate (400), and the filter cotton (401) is installed below the second through hole (313).

8. The river sludge cleaning and recovery equipment according to claim 1 is characterized in that: The wall scraping device (5) comprises a first screw rod (504), which passes through the lower bottom surface of the upper cover (305) and is rotatably installed in the separation barrel (300). A rotating disk (512) is fixedly installed on the first screw rod (504), and the first screw rod (504) drives the rotating disk (512) to rotate under the drive of the third motor (500).

9. The river sludge cleaning and recovery equipment according to claim 8, characterized in that: A fixed rod (304) is fixedly installed in the separation barrel (300); a movable sleeve (505) is threadedly connected to the first screw rod (504); a fixing hole (506) is formed on the movable sleeve (505); the fixed rod (304) is installed in the fixing hole (506); a rotating sleeve (508) is rotatably installed on the movable sleeve (505); scraping rods (509) are fixedly installed on both sides of the rotating sleeve (508); a limiting hole (510) is formed on the scraping rod (509); a limiting rod (511) is fixedly installed on the rotating disk (512); the limiting rod (511) is movably installed in the limiting hole (510); the scraping rod (509) is driven to move and clean the dehydrated sludge on the barrel wall through the cooperation of the movable sleeve (505), the rotating sleeve (508), the limiting rod (511) and the rotating disk (512).

10. A method for cleaning and recovering river sludge, characterized in that: Using the river sludge cleaning and recovery equipment according to any one of claims 1 to 9, the method comprises: (1) inputting the river sludge to be treated into the stone screening unit (2) to achieve preliminary impurity removal of the river sludge; (2) The river sludge after preliminary impurity removal in step (1) is input into the separation unit (3) to dewater the river sludge, and the separated river water and the dewatered sludge are collected.

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