Sludge treatment device for river regulation

Abstract

The invention belongs to the field of sewage sludge treatment, and particularly relates to a sludge treatment device for river regulation, which comprises a pretreatment module, the pretreatment module comprises a centrifugal tank rotationally arranged in a treatment box, and a power motor for driving the centrifugal tank to rotate adopts a variable speed motor; a centrifugal channel is formed in the inner side wall of the middle section of the centrifugal tank in the vertical direction, and sludge can penetrate through the centrifugal channel; a dynamic grid assembly corresponding to the centrifugal channel is arranged on the outer side wall of the middle section of the centrifugal tank in the vertical direction, and the dynamic grid assembly is used for automatically adjusting the size of a grid channel area when the centrifugal tank rotates; a flocculation stirring assembly is arranged in the flocculation box; and the dehydrator main body is a stacked screw dehydrator. In conclusion, the sludge treatment device provided by the embodiment of the invention can be used for effectively treating the sludge, and the sludge is transported after being separated and dehydrated, so that the treatment cost of the river sludge can be greatly reduced.

Description

Technical Field

[0001] This invention belongs to the field of sludge treatment technology, and particularly relates to the field of dewatering treatment of mud-water mixtures, specifically a sludge treatment device for river management. Background Technology

[0002] In related technologies, sludge is a form of water pollution, belonging to the bottom sediment of river sewage. Especially in river management, the bottom sediment generally has a high water content. Directly transporting sludge to processing plants after dredging significantly increases the cost of dredging operations, while traditional landfill methods affect the surrounding soil. Therefore, in river sludge treatment technologies, on-site dewatering is generally required during dredging operations before transportation, which greatly reduces transportation costs and has gradually become the mainstream method. Existing technologies typically set up temporary dredging operation platforms near the riverbank, installing sludge dewatering equipment on these platforms. However, with traditional sludge dewatering equipment, impurities are often mixed in with the sludge during dewatering. If sludge containing impurities is directly treated using the equipment, frequent cleaning is required, affecting the continuous operation of the dewatering equipment and reducing sludge treatment efficiency. Summary of the Invention

[0003] The purpose of this invention is to provide a sludge treatment device for river management, aiming to solve the technical problem of low sludge treatment efficiency in existing sludge treatment equipment.

[0004] To achieve the above objectives, the present invention provides the following technical solution.

[0005] According to one embodiment of the present invention, a sludge treatment device for river management is provided, comprising:

[0006] The pretreatment module includes a treatment box, a centrifuge tank rotatably mounted inside the treatment box, and a variable speed motor for driving the centrifuge tank to rotate. The centrifuge tank has a centrifugal channel on its inner side wall along the vertical middle section for sludge to pass through. The centrifuge tank has a dynamic grid assembly on its outer side wall along the vertical middle section corresponding to the centrifugal channel. The dynamic grid assembly is used to automatically adjust the size of the grid channel area when the centrifuge tank rotates.

[0007] The flocculation module includes a flocculation box with an internal flocculation mixing component. The inlet end of the flocculation box is connected to the sludge chamber via a pump inlet pipe, and an extraction pump is connected in series on the pump inlet pipe.

[0008] The dewatering module includes a dewatering machine body, which is connected to the flocculation box via a pipeline. The mud-water mixture after flocculation treatment in the flocculation box is transported to the dewatering machine body through the pipeline. The dewatering machine body is a screw press dewatering machine. The filtrate after dewatering is discharged from the outlet at the lower side of the dewatering machine body and enters the bottom water collection tank. The bottom water collection tank is also connected to the treatment tank via a water supply pipe.

[0009] Furthermore, the preprocessing module also includes:

[0010] A liquid level sensor is installed inside the treatment tank to detect the liquid level inside the tank. When the liquid level in the treatment tank drops, the liquid level sensor transmits a signal to the control system. After receiving the signal, the control system starts the water supply pump, which allows the filtrate in the bottom water collection tank to enter the treatment tank through the water supply pipe. The water supply pump is installed on the water supply pipe.

[0011] Furthermore, the preprocessing module also includes:

[0012] The feeding chamber is located in the top inner cavity of the processing box; the feeding chamber has a funnel-shaped structure, and the bottom outlet of the feeding chamber is connected to the top inlet of the centrifuge tank, and the connection between the top of the centrifuge tank and the bottom outlet of the feeding chamber is made by a rotating connection.

[0013] The sludge chamber is located in the lower inner cavity of the treatment tank, and the dynamic grid assembly is located inside the sludge chamber.

[0014] Furthermore, the centrifuge tank is coaxially rotatably equipped with a conveying auger assembly along its vertical inner cavity, the conveying auger assembly comprising:

[0015] The auger shaft is coaxially arranged to rotate along the inner cavity of the centrifuge tank.

[0016] A first auger blade is installed on the auger shaft located in the upper section of the centrifuge tank, and a second auger blade is installed on the auger shaft located in the lower section of the centrifuge tank.

[0017] The spiral direction of the first auger blade is opposite to that of the second auger blade.

[0018] Furthermore, the bottom of the centrifuge tank extends into the sludge collection tank;

[0019] The centrifuge tank located inside the sludge collection box has a discharge port on the bottom side wall, and a plugging ring for sealing the discharge port is rotatably fitted on the outer ring of the bottom of the centrifuge tank. The height of the plugging ring on the outer ring of the bottom of the centrifuge tank is adjusted by an electric telescopic rod.

[0020] The telescopic end of the electric telescopic rod extends into the sludge collection tank, and the telescopic end of the electric telescopic rod is connected to the plug ring.

[0021] Furthermore, multiple dynamic grid components are configured to correspond one-to-one with multiple centrifugation channels;

[0022] The dynamic grid component includes:

[0023] The vertical fixed grid pole group consists of multiple fixed vertical poles arranged in an arc array, with the top of each fixed vertical pole fixedly connected to an arc-shaped connecting plate.

[0024] Multiple inclined grid bar groups are equidistantly arranged. One end of each inclined grid bar group is fixedly connected to the outer wall of the centrifuge tank, and the other end of each inclined grid bar group is fixedly connected to the second arc-shaped support plate, so that the multiple inclined grid bar groups are fixedly arranged at equal intervals.

[0025] The vertical movable grid pole group consists of multiple movable vertical poles arranged along an arc-shaped array.

[0026] Furthermore, there is a movable vertical rod between two adjacent fixed vertical rods. The movable vertical rod is slidably mounted on the arc-shaped connecting plate. One end of the movable vertical rod extends between the two fixed vertical rods, and the other end of the movable vertical rod is slidably connected to the corresponding diagonal grid rod group.

[0027] Furthermore, the second arc-shaped support plate is supported and fixed by vertically arranged vertical support rods, and the vertical support rods are fixedly installed on the first arc-shaped support plate;

[0028] The first arc-shaped support plate is fixedly installed at one end of the corresponding support shaft, and the other end of the support shaft is fixedly connected to the outer wall of the support ring fixedly set in the centrifugal channel to achieve stable support for the inclined grid rod group;

[0029] In addition, the arc-shaped connecting plate is provided with a through hole that matches the support shaft. The support shaft slides through the through hole in the arc-shaped connecting plate to guide the vertical fixed grid rod group when it is displaced relative to the centrifuge tank.

[0030] Furthermore, the ends of the movable vertical rods of the vertical movable grid rod assembly are equipped with guide rollers that can rotate freely;

[0031] The dynamic grid component also includes:

[0032] The elastic connecting strip is connected and installed at its end on the corresponding oblique grid bar group, and the elastic connecting strip is wound around multiple guide rollers; the side of the guide roller has a groove for engaging the elastic connecting strip.

[0033] Compared with existing technologies, the beneficial effects of the sludge treatment device for river management of the present invention are:

[0034] This invention utilizes a dynamic grid assembly. During use, the rotation of the centrifuge tank causes the vertical fixed grid rods and vertical movable grid rods to be thrown away from the centrifuge tank by centrifugal force, moving in the opposite direction. This centrifugal motion causes the sludge inside the centrifuge tank to be thrown out, passing through the grid channel areas of the vertical fixed grid rods, vertical movable grid rods, and oblique grid rods. Furthermore, under the influence of centrifugal force, the dynamic grid assembly in this embodiment can dynamically change when the centrifuge tank is rotating at varying speeds, preventing clogging and ensuring effective separation of impurities from the sludge. Additionally, the flocculation and dewatering modules in this invention enable sludge dewatering. In summary, the sludge treatment device provided by this invention can effectively treat sludge. After separation and dewatering, the sludge can be transported, significantly reducing the cost of river sludge treatment. Attached Figure Description

[0035] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0036] In the attached diagram:

[0037] Figure 1 Structural diagram of the sludge treatment device for river management provided by the present invention;

[0038] Figure 2 A schematic diagram of the centrifuge tank in the sludge treatment device for river management provided by the present invention;

[0039] Figure 3 A schematic diagram of the conveying screw conveyor assembly in the sludge treatment device for river management provided by the present invention;

[0040] Figure 4 A schematic diagram illustrating the interaction between the centrifuge tank and the dynamic grid assembly provided by the present invention;

[0041] Figure 5 for Figure 4 An enlarged schematic diagram of part A in the middle;

[0042] Figure 6 This is a partial structural diagram of the dynamic grid component provided by the present invention.

[0043] The attached figures are labeled as follows:

[0044] 100. Flocculation box; 101. Flocculant inlet; 102. Flocculation mixing assembly; 103. Pump inlet pipe; 104. Extraction pump;

[0045] 200. Main body of the dehydrator;

[0046] 300. Water collection tank; 301. Water supply pipe; 3011. Water supply pump;

[0047] 400. Rack;

[0048] 500. Processing box; 501. Sludge inlet pipe; 502. Discharge chamber; 503. Sludge chamber;

[0049] 600. Sewage collection box; 601. Sewage pipe;

[0050] 700. Centrifuge tank; 701. Power motor; 702. Discharge port; 703. Plug ring; 7031. Electric telescopic rod; 704. Centrifuge channel; 705. Support ring; 7051. Support shaft; 7052. First arc-shaped support plate;

[0051] 800. Dynamic grid assembly; 801. Vertical fixed grid rod assembly; 802. Vertical movable grid rod assembly; 803. Guide roller; 804. Arc-shaped connecting plate; 805. Diagonal grid rod assembly; 806. Vertical support rod; 8061. Second arc-shaped support plate; 807. Elastic connecting strip;

[0052] 900. Conveying auger assembly; 901. Forward and reverse motor; 902. Auger shaft; 903. First auger spiral blade; 904. Second auger spiral blade. Detailed Implementation

[0053] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0054] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0055] In this invention, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this invention.

[0056] like Figure 1 and Figure 2 As shown, in one embodiment of the present invention, a sludge treatment device for river management is provided. The sludge treatment device includes a pretreatment module, a flocculation module and a dewatering module arranged sequentially along the sludge treatment process.

[0057] The pretreatment module provided in this embodiment is used to separate debris such as branches and stones from the sludge;

[0058] Specifically, the pretreatment module for separating impurities includes a treatment box 500, which is fixedly mounted on the frame 400;

[0059] The pretreatment module in this embodiment also includes a centrifuge tank 700 that is rotatably disposed inside the treatment box 500;

[0060] Preferably, the processing box 500 has a circular tank structure, which allows the centrifuge tank 700 to be coaxially rotatably installed inside the processing box 500. The bottom of the centrifuge tank 700 and the bottom plate of the processing box 500 are connected by a through-rotation connection. The outer ring of the centrifuge tank 700 and the processing box 500 are connected by a dynamic sealing structure, which is common knowledge, to avoid water leakage at the connection between the centrifuge tank 700 and the bottom plate of the processing box 500.

[0061] In one implementation, the power motor 701 for driving the centrifuge tank 700 to rotate is mounted on the frame 400. Specifically, the output shaft of the power motor 701 is coaxially and fixedly connected to the bottom end of the centrifuge tank 700 so that the power motor 701, which is powered on, can drive the centrifuge tank 700 to rotate inside the processing box 500.

[0062] In particular, the power motor 701 provided in this embodiment is a variable speed motor, which is used to drive the centrifuge tank 700 to rotate at different speeds as needed.

[0063] Please continue to refer to Figure 1 and Figure 2 In this embodiment of the invention, the top inner cavity of the processing box 500 is a feeding chamber 502, which has a funnel-shaped structure. The bottom outlet of the feeding chamber 502 is connected to the top inlet of the centrifuge tank 700, and the connection between the top of the centrifuge tank 700 and the bottom outlet of the feeding chamber 502 is rotatably connected. Under the action of gravity, the sludge in the feeding chamber 502 automatically enters the centrifuge tank 700 along the bottom outlet of the feeding chamber 502.

[0064] Accordingly, in this embodiment, a sludge inlet pipe 501 is connected to the top plate of the processing box 500, and the outlet of the sludge inlet pipe 501 extends into the feeding chamber 502. In this embodiment, the sludge inlet pipe 501 is used to add sludge to be dewatered into the feeding chamber 502.

[0065] Please continue to refer to Figure 1 , Figure 2 , Figures 4-6In this embodiment of the invention, a centrifugal channel 704 is provided on the inner side wall of the middle section of the centrifugal tank 700 along the vertical direction, and the centrifugal channel 704 is used for the passage of sludge; and a dynamic grid assembly 800 corresponding to the centrifugal channel 704 is provided on the outer side wall of the middle section of the centrifugal tank 700 along the vertical direction, and the dynamic grid assembly 800 is used to separate impurities in the sludge when the centrifugal tank 700 rotates and generates centrifugal force;

[0066] In one implementation of the present invention, there are multiple dynamic grid components 800, and the multiple dynamic grid components 800 are configured in a one-to-one correspondence with the multiple centrifugal channels 704.

[0067] Furthermore, such as Figures 1-3 As shown, the centrifuge tank 700 of the present invention is coaxially rotatably provided with a conveying auger assembly 900 in the vertical inner cavity. When the conveying auger assembly 900 is in operation, it conveys the sludge in the centrifuge tank 700. Preferably, the conveying auger assembly 900 includes an auger shaft 902, which is coaxially rotatably provided in the inner cavity of the centrifuge tank 700. A first auger spiral blade 903 is provided on the auger shaft 902 located in the upper section of the inner cavity of the centrifuge tank 700, and a second auger spiral blade 904 is provided on the auger shaft 902 located in the lower section of the inner cavity of the centrifuge tank 700.

[0068] The spiral direction of the first auger spiral blade 903 is opposite to that of the second auger spiral blade 904. Since the forward and reverse motor 901 can drive the auger shaft 902 to rotate clockwise or counterclockwise, based on the spiral direction of the auger shaft 902, if the auger shaft 902 rotates clockwise, the sludge in the centrifuge tank 700 can be made to accumulate in the middle section of the centrifuge tank 700. Conversely, if the auger shaft 902 rotates counterclockwise, the sludge in the middle section of the centrifuge tank 700 (which will be debris after separation) can continue to move down the lower section of the centrifuge tank 700 under the action of gravity until it is discharged from the bottom of the centrifuge tank 700.

[0069] Preferred, such as Figure 1As shown, the bottom end of the centrifuge tank 700 of the present invention extends into the sludge collection tank 600, which is fixedly installed on the frame 400. The sludge collection tank 600 is used to collect the residual debris after the sludge is separated from the centrifuge tank 700. In addition, the centrifuge tank 700 located in the sludge collection tank 600 has a discharge port 702 on the bottom side wall, and a plugging ring 703 is rotatably fitted on the outer ring of the bottom of the centrifuge tank 700. The height of the plugging ring 703 on the outer ring of the bottom of the centrifuge tank 700 is adjusted by an electric telescopic rod 7031. The telescopic rod 7031 is fixedly installed on the frame 400. The telescopic end of the electric telescopic rod 7031 extends into the sludge collection tank 600, and the telescopic end of the electric telescopic rod 7031 is connected to the plugging ring 703. Based on this, the telescopic rod 7031 is used to move the plugging ring 703 downward, so that the plugging ring 703 is fitted on the discharge outlet 702 to block the discharge outlet 702. Since the plugging ring 703 is rotatably fitted on the centrifuge tank 700, the installation of the plugging ring 703 does not affect the rotation of the centrifuge tank 700.

[0070] Therefore, in this embodiment of the invention, when it is necessary to discharge the residual sludge and debris in the centrifuge tank 700 into the sludge collection box 600, it is only necessary to control the extension and retraction of the electric telescopic rod 7031 so that the plugging ring 703 moves upward relative to the discharge port 702, so that the discharge port 702 can be leaked out. At this time, in conjunction with the rotation of the second auger spiral blade 904, the residual sludge and debris in the centrifuge tank 700 can be discharged into the sludge collection box 600.

[0071] Accordingly, the bottom side of the sludge collection box 600 in this embodiment has a drain pipe 601 with a valve. After opening the valve on the drain pipe 601, it is convenient to discharge the debris collected in the sludge collection box 600.

[0072] Please continue to refer to Figures 1-6 In one implementation of the present invention, a single dynamic grid component 800 includes a vertical fixed grid rod group 801, which consists of multiple fixed vertical rods arranged in a circular arc array, and the top end of each fixed vertical rod is fixedly connected to an arc-shaped connecting plate 804.

[0073] The dynamic grid assembly 800 of the present invention further includes a plurality of oblique grid rod groups 805, which are equidistantly arranged. One end of each oblique grid rod group 805 is fixedly connected to the outer wall of the centrifuge tank 700, and the other end of the oblique grid rod group 805 is fixedly connected to the second arc-shaped support plate 8061, so that the plurality of oblique grid rod groups 805 are equidistantly fixedly arranged.

[0074] Furthermore, the dynamic grid assembly 800 of the present invention also includes a vertical movable grid rod group 802, which consists of multiple movable vertical rods arranged in an arc-shaped array. The number of movable vertical rods is one less than the number of fixed vertical rods. That is, the number of fixed vertical rods in the vertical fixed grid rod group 801 is N+1, while the number of movable vertical rods in the vertical movable grid rod group 802 is N, so that there is one movable vertical rod between two fixed vertical rods.

[0075] Specifically, such as Figure 2 , Figure 5 and Figure 6 As shown, a movable vertical rod is provided between two adjacent fixed vertical rods. The movable vertical rod is slidably mounted on the arc-shaped connecting plate 804, so that one end of the movable vertical rod extends between the two fixed vertical rods, and the other end of the movable vertical rod is slidably connected to the corresponding oblique grid rod group 805. It can be understood that the oblique grid rod group 805 provided in this embodiment has a guide groove on its side wall, and the other end of the movable vertical rod has a guide slider that matches the guide groove, so that the other end of the movable vertical rod slides along the guide groove.

[0076] Therefore, it can be understood that when the dynamic grid assembly 800 provided in this embodiment is in use, due to the rotation of the centrifuge tank 700, the vertical fixed grid rod group 801 and the vertical movable grid rod group 802 are thrown away from the centrifuge tank 700 under the action of centrifugal force, that is, they move in the opposite direction to the centrifuge tank 700. Such centrifugal motion causes the sludge in the centrifuge tank 700 to be thrown out, that is, the sludge is thrown out through the grid channel area of ​​the vertical fixed grid rod group 801, the vertical movable grid rod group 802, and the oblique grid rod group 805.

[0077] Furthermore, since the inclined grid bar group 805 is an inclined structure, when the moving vertical movable grid bar group 802 moves along the inclined grid bar group 805, the movable vertical bar will have displacement relative to the fixed vertical bar. During this process, the movable vertical bar will have displacement in the grid channel area of ​​the inclined grid bar group 805, which can clean the grid channel area of ​​the inclined grid bar group 805 and remove blockages. The relative displacement in the vertical direction between the vertical fixed grid bar group 801 and the vertical movable grid bar group 802 also cleans the grid channel areas of the vertical fixed grid bar group 801 and the vertical movable grid bar group 802. It can be seen that, under the action of centrifugal force, when the centrifuge tank 700 is rotating at a variable speed, the dynamic grid component 800 of this embodiment can have dynamic changes, which can avoid the dynamic grid component 800 from becoming blocked, thus ensuring the separation effect of impurities in the sludge.

[0078] Additionally, please continue to refer to Figure 2The second arc-shaped support plate 8061 provided in this embodiment of the invention is supported and fixed by a vertically arranged vertical support rod 806, and the vertical support rod 806 is fixedly installed on the first arc-shaped support plate 7052; the first arc-shaped support plate 7052 is fixedly installed on one end of the corresponding support shaft 7051, and the other end of the support shaft 7051 is fixedly connected to the outer wall of the support ring 705 fixedly arranged in the centrifugal channel 704, so as to achieve stable support for the inclined grid rod group 805;

[0079] In addition, the arc-shaped connecting plate 804 of the present invention is provided with a through hole that cooperates with the support shaft 7051. The support shaft 7051 slides through the through hole on the arc-shaped connecting plate 804 and is used to guide the vertical fixed grid rod group 801 relative to the centrifuge tank 700 when it is displaced.

[0080] Furthermore, in order to reset the vertical fixed grid rod group 801 and the vertical movable grid rod group 802 after the centrifuge tank 700 stops rotating, the movable vertical rod end of the vertical movable grid rod group 802 of the present invention is provided with a guide roller 803 that can rotate freely. It can be understood that each movable vertical rod end has a guide roller 803. The dynamic grid assembly 800 of this embodiment also includes an elastic connecting belt 807. The end of the elastic connecting belt 807 is connected and installed on the corresponding oblique grid rod group 805. The elastic connecting belt 807 is wrapped around multiple guide rollers 803 to tighten the guide rollers 803. When the vertical fixed grid rod group 801 moves away from the centrifuge tank 700, it will overcome the tension of the elastic connecting belt 807 and cause the elastic connecting belt 807 to be stretched. When the centrifuge tank 700 stops rotating, the vertical fixed grid rod group 801 and the vertical movable grid rod group 802 are reset under the reset action of the tension of the elastic connecting belt 807.

[0081] Preferably, such as Figure 6 As shown, the guide roller 803 has a groove on its side. The groove is used to engage the elastic connecting strip 807, but does not affect the sliding of the elastic connecting strip 807 relative to the groove, thus preventing the elastic connecting strip 807 from accidentally falling off the guide roller 803.

[0082] like Figure 1 and Figure 2 As shown, for a single centrifugal channel 704, its corresponding dynamic grid assembly 800 consists of two sets of inclined grid rods 805, one above the other. The inclined structure of the lower inclined grid rods 805 facilitates the downward movement of debris trapped by centrifugal separation into the lower inner cavity of the centrifugal tank 700 under its own gravity, achieving adaptive cleaning. Furthermore, the dynamic grid assembly 800 configured in this embodiment can prevent debris from clogging the system, greatly reducing the frequency of downtime maintenance.

[0083] Please continue to refer to Figure 1In this embodiment, the flocculation module includes a flocculation box 100, which is fixedly mounted on a frame 400. A flocculation stirring assembly 102 is installed inside the flocculation box 100. The flocculation stirring assembly 102 is used to stir the mud-water mixture and flocculant inside the flocculation box 100 to form a flocculation reaction and improve the aggregation effect of suspended solids. The flocculation stirring assembly 102 includes a mixing paddle and a mixing motor. The mixing motor drives the mixing paddle to rotate inside the flocculation box 100, ensuring sufficient contact between the mud-water and flocculant and accelerating floc formation. Simultaneously, the inlet end of the flocculation box 100 is connected to the sludge chamber 503 via a pump inlet pipe 103. A suction pump 104 is connected in series on the pump inlet pipe 103. Activating the suction pump 104 pumps the mud-water mixture from the sludge chamber 503 into the flocculation box 100.

[0084] Furthermore, a flocculant inlet 101 is provided on the top plate of the flocculation box 100, through which flocculant is added into the flocculation box 100.

[0085] Please continue to refer to Figure 1 and Figure 2 The dewatering module provided in this embodiment includes a dewatering machine body 200. The dewatering machine body 200 is connected to the flocculation box 100 via a pipeline. The flocculated sludge-water mixture in the flocculation box 100 is transported to the dewatering machine body 200 via the pipeline. The dewatering machine body 200 is a screw press dewatering machine, which uses a screw press structure to squeeze and dewater the flocculated sludge, effectively reducing the moisture content of the sludge cake. The front end of the dewatering machine body 200 has an inlet connected to the flocculation box 100 via a pipeline, and the rear end has an outlet for discharging the sludge cake. During the dewatering process, a multi-stage squeezing chamber is formed between the screw press shaft, the fixed ring, and the moving ring. As the sludge moves forward, the gap gradually decreases and the pressure gradually increases, achieving continuous dewatering. At the same time, the cleaning device built into the dewatering machine body 200 sprays periodically to prevent clogging and ensure stable dewatering efficiency. The filtrate after dewatering is discharged from the outlet at the lower side of the dewatering machine body 200 and enters the water collection tank 300.

[0086] In addition, in this embodiment, the water collection tank 300 and the treatment tank 500 are connected by a water supply pipe 301, on which a water supply pump 3011 is installed. A liquid level sensor is installed inside the treatment tank 500 to detect the liquid level. When the liquid level in the treatment tank 500 decreases, the liquid level sensor transmits a signal to the control system. Upon receiving the signal, the control system starts the water supply pump 3011, allowing the filtrate in the water collection tank 300 to enter the treatment tank 500 through the water supply pipe 301, replenishing the water source and maintaining a mud-water mixture in the treatment tank 500, facilitating the centrifugal separation process of the sludge. When the liquid level in the treatment tank 500 reaches a set height, the liquid level sensor sends a signal again, and the control system shuts off the water supply pump 3011, stopping the liquid supply, thereby achieving automated liquid level control and ensuring continuous and stable operation of the centrifugal separation process.

[0087] The sludge treatment device provided in this embodiment of the invention can effectively treat sludge. The sludge is separated and dewatered before being transported, which can greatly reduce the treatment cost of river sludge.

[0088] The above solutions are merely illustrative examples of preferred embodiments and are not intended to limit the scope of the invention. Appropriate substitutions and / or modifications can be made according to user needs when implementing this invention.

[0089] The number of devices and processing scale described herein are for the purpose of simplifying the description of the invention. Applications, modifications, and variations of the invention will be readily apparent to those skilled in the art.

[0090] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. It can be applied to various fields suitable for the present invention. Other modifications can be readily made by those skilled in the art. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and examples shown and described herein.

Claims

1. A sludge treatment device for river management, characterized in that, include: The pretreatment module includes a treatment box, a centrifuge tank rotatably mounted inside the treatment box, and a variable speed motor for driving the centrifuge tank to rotate. The centrifuge tank has a centrifugal channel on its inner side wall along the vertical middle section for sludge to pass through. The centrifuge tank has a dynamic grid assembly on its outer side wall along the vertical middle section corresponding to the centrifugal channel. The dynamic grid assembly is used to automatically adjust the size of the grid channel area when the centrifuge tank rotates. The flocculation module includes a flocculation box with an internal flocculation mixing component. The inlet end of the flocculation box is connected to the sludge chamber via a pump inlet pipe, and an extraction pump is connected in series on the pump inlet pipe. The dewatering module includes a dewatering machine body, which is connected to the flocculation box via a pipeline. The mud-water mixture after flocculation treatment in the flocculation box is transported to the dewatering machine body through the pipeline. The dewatering machine body is a screw press dewatering machine. The filtrate after dewatering is discharged from the outlet at the lower side of the dewatering machine body and enters the bottom water collection tank. The bottom water collection tank is also connected to the treatment tank via a water supply pipe.

2. The sludge treatment device for river management according to claim 1, characterized in that, The preprocessing module further includes: A liquid level sensor is installed inside the treatment tank to detect the liquid level inside the tank. When the liquid level in the treatment tank drops, the liquid level sensor transmits a signal to the control system. After receiving the signal, the control system starts the water supply pump, which allows the filtrate in the bottom water collection tank to enter the treatment tank through the water supply pipe. The water supply pump is installed on the water supply pipe.

3. The sludge treatment device for river management according to claim 2, characterized in that, The preprocessing module further includes: The feeding chamber is located in the top inner cavity of the processing box; the feeding chamber has a funnel-shaped structure, and the bottom outlet of the feeding chamber is connected to the top inlet of the centrifuge tank, and the connection between the top of the centrifuge tank and the bottom outlet of the feeding chamber is made by a rotating connection. The sludge chamber is located in the lower inner cavity of the treatment tank, and the dynamic grid assembly is located inside the sludge chamber.

4. The sludge treatment device for river management according to claim 3, characterized in that, The centrifuge tank is coaxially rotatably mounted with a conveying auger assembly along its vertical inner cavity. The conveying auger assembly includes: The auger shaft is coaxially arranged to rotate along the inner cavity of the centrifuge tank. A first auger blade is installed on the auger shaft located in the upper section of the centrifuge tank, and a second auger blade is installed on the auger shaft located in the lower section of the centrifuge tank. The spiral direction of the first auger blade is opposite to that of the second auger blade.

5. The sludge treatment device for river management according to claim 4, characterized in that, The bottom of the centrifuge tank extends into the sludge collection tank; The centrifuge tank located inside the sludge collection box has a discharge port on the bottom side wall, and a plugging ring for sealing the discharge port is rotatably fitted on the outer ring of the bottom of the centrifuge tank. The height of the plugging ring on the outer ring of the bottom of the centrifuge tank is adjusted by an electric telescopic rod. The telescopic end of the electric telescopic rod extends into the sludge collection tank, and the telescopic end of the electric telescopic rod is connected to the plug ring.

6. The sludge treatment apparatus for river management according to any one of claims 2 to 5, characterized in that, Multiple dynamic grid components are configured to correspond one-to-one with multiple centrifugation channels; The dynamic grid component includes: The vertical fixed grid pole group consists of multiple fixed vertical poles arranged in an arc array, with the top of each fixed vertical pole fixedly connected to an arc-shaped connecting plate. Multiple inclined grid bar groups are equidistantly arranged. One end of each inclined grid bar group is fixedly connected to the outer wall of the centrifuge tank, and the other end of each inclined grid bar group is fixedly connected to the second arc-shaped support plate, so that the multiple inclined grid bar groups are fixedly arranged at equal intervals. The vertical movable grid pole group consists of multiple movable vertical poles arranged along an arc-shaped array.

7. The sludge treatment device for river management according to claim 6, characterized in that, Between two adjacent fixed vertical bars, there is a movable vertical bar. The movable vertical bar is slidably mounted on the arc-shaped connecting plate. One end of the movable vertical bar extends between the two fixed vertical bars, and the other end of the movable vertical bar is slidably connected to the corresponding diagonal grid bar group.

8. The sludge treatment device for river management according to claim 7, characterized in that, The second arc-shaped support plate is supported and fixed by vertically installed vertical support rods; The vertical support rod is fixedly installed on the first arc-shaped support plate; The first arc-shaped support plate is fixedly installed at one end of the corresponding support shaft, and the other end of the support shaft is fixedly connected to the outer wall of the support ring fixedly set in the centrifugal channel. The arc-shaped connecting plate is also provided with through holes that cooperate with the support shaft. The support shaft slides through the through holes in the arc-shaped connecting plate to guide the vertical fixed grid rod group when it is displaced relative to the centrifuge tank.

9. The sludge treatment device for river management according to claim 8, characterized in that, The vertical movable grid rod assembly has guide rollers at the ends of the movable vertical rods that can rotate freely; The dynamic grid component also includes: The elastic connecting strip is connected and installed at its end on the corresponding oblique grid bar group, and the elastic connecting strip is wound around multiple guide rollers; the side of the guide roller has a groove for engaging the elastic connecting strip.

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