Multi-stage dehydration type comprehensive treatment device and comprehensive treatment method for river sludge

Abstract

The invention discloses a multistage dehydration type river sludge comprehensive treatment device and a comprehensive treatment method. The multistage dehydration type river sludge comprehensive treatment device comprises a shell, a primary filtering assembly, a centrifugal driving assembly and a centrifugal tube, the centrifugal tube comprises a connecting tube, a conical spiral tube and a centrifugal part; one end of the connecting pipe is connected with the primary filtering assembly; the large-diameter end and the small-diameter end of the conical spiral pipe are connected with the other end of the connecting pipe and the centrifugal part; a first draining hole is formed in the conical spiral pipe; the centrifugal driving assembly is arranged on the centrifugal part; the centrifugal driving assembly is provided with a first transmission part, and a second transmission part is arranged in the shell. A sludge outlet is formed in the side wall of the shell; an extrusion ring connected with the centrifugal driving assembly is rotationally arranged at the position, corresponding to the sludge outlet, in the shell; an extrusion block is movably arranged in the extrusion ring; a second draining hole is formed in the extrusion ring; an extrusion cavity is formed among the extrusion ring, the extrusion block and the inner wall of the shell; multi-stage treatment of sludge is achieved, the sludge dewatering effect is improved, the dewatering efficiency is higher, the size is small, installation and maintenance are convenient, and energy consumption and the failure rate are reduced.

Description

Technical Field

[0001] The present invention relates to the field of sludge treatment, and in particular to a multi-stage dewatering river sludge comprehensive treatment device and a comprehensive treatment method. Background Art

[0002] In the current sludge treatment field, existing sludge dewatering integrated devices generally have the problems of large size and inconvenient installation and maintenance. These devices often use a single physical or chemical dewatering technology, such as screw pressing, belt filter pressing and centrifugal separation. Although these technologies can remove moisture from sludge to a certain extent, they are difficult to significantly reduce the moisture content of sludge due to low dewatering efficiency.

[0003] In addition, since these technologies only perform dehydration in a single stage, the entire treatment process takes a long time and increases the operating load of the equipment. Summary of the invention

[0004] The purpose of the present invention is to overcome the above-mentioned shortcomings and provide a multi-stage dewatering river sludge comprehensive treatment device and a comprehensive treatment method to achieve multi-stage treatment of sludge, improve the dewatering effect of sludge, achieve lower water content and higher sludge treatment capacity, and have higher dewatering efficiency. At the same time, a modular design is adopted to reduce the volume of the treatment equipment, facilitate installation and maintenance, and reduce the energy consumption and failure rate of sludge treatment.

[0005] To achieve the above object, the specific scheme of the present invention is as follows: The first aspect of the present invention provides a multi-stage dewatering river sludge comprehensive treatment device, comprising a shell; a primary filter assembly is rotatably provided on the top of the shell, and a centrifugal drive assembly and a centrifugal tube are provided inside; The centrifugal tube comprises a connecting tube, a conical spiral tube and a centrifugal part; one end of the connecting tube is connected to the primary filtering assembly; the large diameter end and the small diameter end of the conical spiral tube are respectively connected to the other end of the connecting tube and the centrifugal part; the conical spiral tube is uniformly provided with first drainage holes; the centrifugal drive assembly is arranged in the centrifugal part; the centrifugal drive assembly is provided with a first transmission member, and a second transmission member cooperating with the first transmission member is arranged in the housing, so that the centrifugal drive assembly drives the centrifugal tube to rotate; A mud outlet is provided on the side wall of the shell; an extrusion ring connected to a centrifugal drive assembly is rotatably provided at a position corresponding to the mud outlet in the shell; an extrusion block is movably provided in the extrusion ring; second drainage holes are evenly distributed on the extrusion ring; an extrusion cavity is formed between the extrusion ring, the extrusion block and the inner wall of the shell, which is connected to the centrifugal part through the centrifugal drive assembly.

[0006] Optionally, the inner diameter of the conical spiral tube gradually decreases from top to bottom.

[0007] Optionally, a fixing block is provided on the extrusion ring; and a first spring is provided between the fixing block and the extrusion block.

[0008] Optionally, a drain cover is provided at the bottom of the shell, and the centrifugal part movably abuts against the top of the drain cover; a groove is provided at the top of the drain cover; and the second transmission member is arranged in the groove.

[0009] Optionally, the first transmission member is a gear; and the second transmission member is a ring gear.

[0010] Optionally, the centrifugal drive assembly includes a water filter cartridge, a conical roller and a power piece; the water filter cartridge is inserted into the centrifugal part; the open end of the water filter cartridge is connected to the centrifugal part; the peripheral wall of the water filter cartridge is evenly distributed with third drainage holes; the power piece is arranged at the closed end of the water filter cartridge; the conical roller is rotatably arranged in the water filter cartridge; the small diameter end of the conical roller is movably passed through the centrifugal tube and is connected to the first transmission member; spiral blades are provided on the conical surface of the conical roller along its length direction; the axis of the conical roller does not coincide with the axis of the conical spiral tube; the upper end of the water filter cartridge is connected to the extrusion ring through a conduit; the conduit is connected to the extrusion chamber.

[0011] Optionally, the pitch of the spiral blades decreases gradually from bottom to top.

[0012] Optionally, the primary filter assembly includes a filter plate and a separation plate arranged on the filter plate; a gap is provided between the periphery of the separation plate and the inner periphery of the filter plate; a plurality of sliding rods are evenly distributed along the circumference of the bottom surface of the separation plate; a second spring is connected between each sliding rod and the middle part of the separation plate; each sliding rod is hinged with a plurality of hooks; each hook moves upward and penetrates the separation plate; each hook is also hinged with the separation plate; the filter plate is connected with the connecting pipe; A boss extends from the inner wall of the shell; the top surface of the boss is provided with a first inclined surface smoothly transitioning to the top surface of the separation disc; the two sides of the boss are respectively provided with second inclined surfaces for cooperating with the slide rod; the separation disc and the filter disc are both rotatably matched with the boss.

[0013] Optionally, a conical portion is provided at the bottom of the centrifugal portion; the conical portion is movably abutted against the drain cover; and the conical surface of the conical portion is evenly distributed with fourth drain holes along the circumferential direction.

[0014] The second aspect of the present invention provides a comprehensive treatment method based on the above-mentioned multi-stage dewatering river sludge comprehensive treatment device, which specifically includes the following steps: Step S1: preliminary filtration, performing primary treatment on the sludge through a primary filtration component, and introducing the filtered sludge into a centrifuge tube; Step S2: primary centrifugal extrusion dehydration, wherein the centrifugal tube is driven to rotate by a centrifugal drive assembly, so that the sludge flowing through the centrifugal tube is dehydrated under the combined action of centrifugal force and extrusion force; Step S3: secondary centrifugal extrusion dehydration, the sludge after the first centrifugal extrusion dehydration is transported to the extrusion chamber through the centrifugal drive assembly, and the sludge is dehydrated under the combined action of centrifugal force and extrusion force during the transportation process; Step S4: three centrifugal extrusion dehydration, the centrifugal tube drives the extrusion ring to rotate, and the extrusion block squeezes the sludge in the extrusion chamber, so that the sludge is dehydrated under the combined action of centrifugal force and extrusion force.

[0015] The beneficial effects of the present invention are as follows: the present invention realizes multi-stage treatment of sludge by arranging a primary filter component, a centrifugal tube, a centrifugal drive component and an extrusion ring, thereby improving the dehydration effect of the sludge, achieving a lower moisture content and a higher sludge treatment capacity, and having a higher dehydration efficiency; at the same time, a modular design is adopted to reduce the volume of the treatment equipment, facilitate installation and maintenance, and reduce the energy consumption and failure rate of sludge treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a cross-sectional schematic diagram of the present invention; Figure 3 This is a schematic diagram of the structure of the present invention after the housing is hidden; Figure 4 It is a structural schematic diagram of a centrifuge tube of the present invention; Figure 5 It is a structural schematic diagram of the centrifugal drive assembly of the present invention; Figure 6 is a cross-sectional schematic diagram of a centrifugal drive assembly of the present invention; Explanation of the reference numerals: 1. Shell; 11. Mud outlet; 12. Drain cover; 13. Gear ring; 14. Boss; 141. First inclined plane; 142. Second inclined plane; 2. Primary filter assembly; 21. Filter disc; 22. Separation disc; 23. Slide rod; 24. Second spring; 25. Hook; 3. Centrifugal drive assembly; 31. Filter cartridge; 32. Conical roller; 33. Power part; 34. Gear; 35. Third drain hole; 36. Spiral blade; 37. Conduit; 4. Centrifugal tube; 41. Connecting tube; 42. Conical spiral tube; 43. Centrifugal part; 44. First drain hole; 45. Conical part; 46. Fourth drain hole; 5. Extrusion ring; 51. Extrusion block; 52. Fixing block; 53. First spring; 54. Second drain hole. DETAILED DESCRIPTION

[0017] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments, but the implementation scope of the present invention is not limited thereto.

[0018] like Figures 1 to 6 As shown, a multi-stage dewatering river sludge comprehensive treatment device described in this embodiment includes a housing 1; a primary filter assembly 2 is rotatably provided on the top of the housing 1, and a centrifugal drive assembly 3 and a centrifugal tube 4 are provided inside; The centrifugal tube 4 includes a connecting tube 41, a conical spiral tube 42 and a centrifugal part 43; one end of the connecting tube 41 is connected to the primary filtering assembly 2; the large diameter end and the small diameter end of the conical spiral tube 42 are respectively connected to the other end of the connecting tube 41 and the centrifugal part 43; the conical spiral tube 42 is evenly distributed with first drainage holes 44; the centrifugal drive assembly 3 is arranged in the centrifugal part 43; the centrifugal drive assembly 3 is provided with a first transmission member, and a second transmission member cooperating with the first transmission member is provided in the housing 1, so that the centrifugal drive assembly 3 drives the centrifugal tube 4 to rotate; A mud outlet 11 is provided on the side wall of the shell 1; an extrusion ring 5 connected to the centrifugal drive assembly 3 is rotatably provided at a position corresponding to the mud outlet 11 in the shell 1; an extrusion block 51 is movably provided in the extrusion ring 5; second drainage holes 54 are evenly distributed on the extrusion ring 5; an extrusion cavity is formed between the extrusion ring 5, the extrusion block 51 and the inner wall of the shell 1, and the extrusion cavity is connected to the centrifugal part 43 through the centrifugal drive assembly 3.

[0019] Specifically, in the actual use of the multi-stage dewatering river sludge comprehensive treatment device of this embodiment, the centrifugal drive assembly 3 drives the centrifugal tube 4 to rotate through the cooperation of the first transmission member and the second transmission member, and the centrifugal tube 4 drives the primary filter assembly 2 to rotate relative to the shell 1. When the sludge to be treated is placed on the primary filter assembly 2, the primary filter assembly 2 performs primary filtering treatment on the sludge, and the sewage filtered out of the primary filter enters the shell 1 and is discharged. At the same time, large impurities are separated from the sludge, so that the large impurities do not enter the centrifugal tube 4, thereby preventing damage to the centrifugal tube 4 and the centrifugal drive assembly 3. The sludge after the primary filtering treatment enters the conical spiral tube 42 through the connecting pipe 41, thereby completing the preliminary filtering process; The sludge entering the conical spiral tube 42 forms an extrusion path for the sludge because the small diameter end of the conical spiral tube 42 faces downward and the large diameter end faces upward. When the sludge flows through the conical spiral tube 42, the centrifugal tube 4 allows the sewage in the sludge to be separated from the sludge under the action of centrifugal force and discharged from the first drain hole 44 into the shell 1. At the same time, the water in the sludge is squeezed out, thereby improving the dehydration effect of the sludge. After centrifugal and extrusion dehydration, the sludge enters the centrifugal part 43 along the conical spiral tube 42 and settles, thereby completing a centrifugal extrusion dehydration process; Then the centrifugal drive assembly 3 transports the precipitated sludge into the extrusion chamber. During the transportation process, the centrifugal drive assembly 3 dehydrates the sludge under the action of centrifugal force and extrusion force, so that the sludge that has completed secondary centrifugal extrusion dehydration enters the extrusion chamber, thereby improving the dehydration effect. The sludge entering the extrusion chamber is further squeezed by the extrusion block 51. At the same time, since the extrusion ring 5 follows the centrifugal tube 4 to rotate relative to the shell 1 through the centrifugal drive assembly 3, the sewage in the sludge can be discharged into the shell 1 through the second drainage hole 54. When the extrusion chamber is connected to the mud outlet 11, the sludge in the extrusion chamber is discharged from the mud outlet 11 under the action of the extrusion block 51, thereby completing three centrifugal extrusion dehydration processes; thus, a continuous and efficient dehydration process for the sludge is formed.

[0020] This embodiment realizes multi-stage treatment of sludge by arranging a primary filter component 2, a centrifugal tube 4, a centrifugal drive component 3 and an extrusion ring 5, thereby improving the dehydration effect of the sludge, achieving a lower water content and a higher sludge treatment capacity, and a higher dehydration efficiency; at the same time, a modular design is adopted to reduce the size of the treatment equipment, facilitate installation and maintenance, and reduce the energy consumption and failure rate of sludge treatment.

[0021] like Figure 2 As shown, in the multi-stage dewatering river sludge comprehensive treatment device of this embodiment, in some implementations, the inner diameter of the conical spiral tube 42 gradually decreases from top to bottom; such an arrangement enables the sludge to be subjected to a greater extrusion force when flowing through the conical spiral tube 42, thereby promoting the efficient squeezing of water in the sludge and further improving the dewatering effect.

[0022] like Figure 3 As shown, in the multi-stage dewatering river sludge comprehensive treatment device of this embodiment, in some embodiments, a fixed block 52 is provided on the extrusion ring 5; a first spring 53 is provided between the fixed block 52 and the extrusion block 51; in this embodiment, the fixed block 52 is provided to partition the extrusion cavity, that is, the fixed block 52, the extrusion block 51, the extrusion ring 5 and the inner wall of the shell 1 jointly enclose the extrusion cavity; after the sludge enters the extrusion cavity, the sludge generates a thrust on the extrusion block 51, so that the first spring 53 is compressed, and the first spring 53 squeezes the sludge in the extrusion cavity, so that the squeezed sewage can be separated through the second drainage hole 54, and as the extrusion ring 5 rotates, when the extrusion ring 5 rotates to connect the extrusion cavity with the mud outlet 11, the sludge in the extrusion cavity is discharged from the mud outlet 11 under the action of the elastic potential energy of the first spring 53.

[0023] like Figure 2 and Figure 3As shown, in the multi-stage dewatering river sludge comprehensive treatment device of this embodiment, in some embodiments, a drain cover 12 is provided at the bottom of the shell 1, and the centrifugal part 43 is movably abutted against the top of the drain cover 12; a groove is provided at the top of the drain cover 12; and the second transmission member is provided in the groove; in this embodiment, the drain cover 12 is provided so that the sewage separated in the shell 1 can be discharged from the shell 1 through the drain cover 12, thereby preventing the accumulation and overflow of water during the treatment process, and optimizing the overall dehydration efficiency. By providing a groove to facilitate the installation of the second transmission member, the centrifugal part 43 and the drain cover 12 can cooperate more stably.

[0024] like Figure 5 and Figure 6 As shown, in the multi-stage dewatering river sludge comprehensive treatment device of this embodiment, in some implementations, the first transmission member is a gear 34; the second transmission member is a gear ring 13; in actual use, the gear 34 is meshed with the gear ring 13, and the centrifugal drive assembly 3 drives the gear 34 to rotate. At the same time, under the action of the gear ring 13, the gear 34 performs a circular motion along the trajectory of the gear ring 13, so that the entire centrifugal drive assembly 3 performs a circular motion. While the centrifugal drive assembly 3 performs a circular motion, it drives the centrifuge tube 4 to rotate, so that the sludge in the centrifuge tube 4 can achieve an efficient dewatering effect under the combined action of centrifugal force and extrusion force.

[0025] like Figure 2 , Figure 3 , Figure 5 and Figure 6 As shown, in the multi-stage dewatering river sludge comprehensive treatment device of this embodiment, in some embodiments, the centrifugal drive assembly 3 includes a water filter cartridge 31, a conical roller 32 and a power member 33; the water filter cartridge 31 is penetrated by the centrifugal part 43; the open end of the water filter cartridge 31 is communicated with the centrifugal part 43; the peripheral wall of the water filter cartridge 31 is evenly distributed with third drainage holes 35; the power member 33 is arranged at the closed end of the water filter cartridge 31; the conical roller 32 is rotatably arranged in the water filter cartridge 31; the small diameter end of the conical roller 32 is movably passed through the centrifugal tube 4 and then connected with the first transmission member; spiral blades 36 are provided on the conical surface of the conical roller 32 along its length direction; the axis of the conical roller 32 does not coincide with the axis of the conical spiral tube 42; the upper end of the water filter cartridge 31 is connected to the extrusion ring 5 through the conduit 37; the conduit 37 is communicated with the extrusion chamber.

[0026] Specifically, the power member 33 is a motor. The motor drives the conical roller 32 to rotate, and the conical roller 32 drives the gear 34 to rotate. The gear 34 cooperates with the gear ring 13 to drive the conical roller 32 to make a circular motion, and the conical roller 32 drives the water filter cartridge 31 to make a circular motion. Since the conical roller 32 is eccentrically arranged, the water filter cartridge 31 drives the centrifugal tube 4 to rotate, so that the sludge in the centrifugal tube 4 can achieve a dehydration effect; the sludge after passing through the conical spiral tube 42 enters the centrifugal part 43, and the sludge is kept still in the centrifugal part 43 so that the sewage in the sludge can be separated. At the same time, due to the rotation of the conical roller 32, the sludge in the centrifugal part 43 moves upward along the trajectory of the spiral blade 36 under the action of the spiral blade 36, and the sludge enters the water filter cartridge 31. Further, under the action of centrifugal force, the sewage is separated from the sludge through the third drainage hole 35, and the water content of the sludge is further reduced; thus, under the action of the spiral blade 36, the sludge is transported to the extrusion chamber.

[0027] like Figure 2 and Figure 6 As shown, in the multi-stage dewatering river sludge comprehensive treatment device of this embodiment, in some implementations, the spacing of the spiral blades 36 gradually decreases from bottom to top; such an arrangement forms a space in the water filter cartridge 31 that gradually tightens upward, so that under the conveyance of the spiral blades 36, the sludge is gradually squeezed during the process of moving upward, further forcing the water in the sludge to be discharged, further improving the dehydration effect and reducing the water content.

[0028] like Figures 1 to 3 As shown, in the multi-stage dewatering river sludge comprehensive treatment device of this embodiment, in some embodiments, the primary filter assembly 2 includes a filter disc 21 and a separation disc 22 arranged on the filter disc 21; there is a gap between the periphery of the separation disc 22 and the inner periphery of the filter disc 21; a plurality of slide bars 23 are evenly distributed along the circumferential direction on the bottom surface of the separation disc 22; each slide bar 23 is connected to the middle part of the separation disc 22 with a second spring 24; each slide bar 23 is hinged with a plurality of hooks 25; each hook 25 moves upward and penetrates the separation disc 22; each hook 25 is also hinged to the separation disc 22; the filter disc 21 is connected to the connecting pipe 41; A boss 14 extends from the inner wall of the shell 1; the top surface of the boss 14 is provided with a first inclined surface 141 which is smoothly transitioned to the top surface of the separation disc 22; the two sides of the boss 14 are respectively provided with second inclined surfaces 142 for cooperating with the slide rod 23; the separation disc 22 and the filter disc 21 are both rotatably matched with the boss 14.

[0029] In actual use, each hook 25 is initially biased toward the axial direction of the separation disc 22, and the sludge to be treated is placed on the separation disc 22. The filter disc 21 rotates relative to the shell 1 driven by the centrifuge tube 4, and the filter disc 21 drives the separation disc 22 to rotate, so that the sludge moves toward the outer periphery of the separation disc 22. Due to the action of the hook 25, large impurities are captured at the hook 25. During the rotation of the separation disc 22, when the slide bar 23 contacts the second inclined surface 142, the boss 14 squeezes the slide bar 23 inward, the second spring 24 is compressed, and the slide bar 23 drives the corresponding hook 25 to gradually swing outward, so that large impurities are discharged along the first inclined surface 141 of the boss 14, and the sludge enters the filter disc 21 through the gap for dehydration; after entering the filter disc 21, the sludge enters the conical spiral tube 42 through the connecting pipe 41 for dehydration.

[0030] In this embodiment, the separation disc 22 rotates so that the sludge enters the filter disc 21 through the gap under the action of centrifugal force, so that the sludge in the filter disc 21 can be dispersed into the connecting pipe 41 for more complete dehydration.

[0031] like Figure 2 and Figure 4 As shown, in the multi-stage dewatering river sludge comprehensive treatment device of this embodiment, in some embodiments, a conical portion 45 is provided at the bottom of the centrifugal portion 43; the conical portion 45 is movably abutted against the drain cover 12; and the conical surface of the conical portion 45 is uniformly distributed with fourth drain holes 46 along the circumferential direction. In this embodiment, the conical portion 45 is provided to guide the sewage separated in the centrifugal portion 43 to be discharged from the centrifugal portion 43 through the fourth drain holes 46.

[0032] The above description is only a preferred embodiment of the present invention. Therefore, any equivalent changes or modifications made according to the structure, characteristics and principles described in the scope of the patent application of the present invention are included in the protection scope of the patent application of the present invention.

Claims

1. A multi-stage dewatering river sludge comprehensive treatment device, characterized in that: It comprises a shell; a primary filtering assembly is rotatably arranged on the top of the shell, and a centrifugal driving assembly and a centrifugal tube are arranged inside the shell; The centrifugal tube comprises a connecting tube, a conical spiral tube and a centrifugal part; one end of the connecting tube is connected to the primary filtering assembly; the large diameter end and the small diameter end of the conical spiral tube are respectively connected to the other end of the connecting tube and the centrifugal part; the conical spiral tube is uniformly provided with first drainage holes; the centrifugal drive assembly is arranged in the centrifugal part; the centrifugal drive assembly is provided with a first transmission member, and a second transmission member cooperating with the first transmission member is arranged in the housing, so that the centrifugal drive assembly drives the centrifugal tube to rotate; A mud outlet is provided on the side wall of the shell; an extrusion ring connected to a centrifugal drive assembly is rotatably provided at a position corresponding to the mud outlet in the shell; an extrusion block is movably provided in the extrusion ring; second drainage holes are evenly distributed on the extrusion ring; an extrusion cavity is formed between the extrusion ring, the extrusion block and the inner wall of the shell, which is connected to the centrifugal part through the centrifugal drive assembly.

2. A multi-stage dewatering river sludge comprehensive treatment device according to claim 1, characterized in that: The inner diameter of the conical spiral tube gradually decreases from top to bottom.

3. The multi-stage dewatering river sludge comprehensive treatment device according to claim 1 is characterized in that: A fixing block is arranged on the extrusion ring; a first spring is arranged between the fixing block and the extrusion block.

4. The multi-stage dewatering river sludge comprehensive treatment device according to claim 1 is characterized in that: A drain cover is provided at the bottom of the shell body, and the centrifugal part movably contacts the top of the drain cover; a groove is provided at the top of the drain cover; and the second transmission member is arranged in the groove.

5. The multi-stage dewatering river sludge comprehensive treatment device according to claim 1 is characterized in that: The first transmission member is a gear; the second transmission member is a ring gear.

6. The multi-stage dewatering river sludge comprehensive treatment device according to claim 1 is characterized in that: The centrifugal drive assembly includes a water filter cartridge, a conical roller and a power piece; the water filter cartridge is inserted into the centrifugal part; the open end of the water filter cartridge is connected with the centrifugal part; the peripheral wall of the water filter cartridge is evenly distributed with third drainage holes; the power piece is arranged at the closed end of the water filter cartridge; the conical roller is rotatably arranged in the water filter cartridge; the small diameter end of the conical roller movably passes through the centrifugal tube and is connected with the first transmission piece; spiral blades are arranged on the conical surface of the conical roller along its length direction; the axis of the conical roller does not coincide with the axis of the conical spiral tube; the upper end of the water filter cartridge is connected with the extrusion ring through a conduit; the conduit is connected with the extrusion chamber.

7. The multi-stage dewatering river sludge comprehensive treatment device according to claim 7 is characterized in that: The pitch of the spiral blades decreases gradually from bottom to top.

8. The multi-stage dewatering river sludge comprehensive treatment device according to claim 1 is characterized in that: The primary filter assembly includes a filter plate and a separation plate arranged on the filter plate; there is a gap between the periphery of the separation plate and the inner periphery of the filter plate; a plurality of sliding rods are evenly distributed along the circumference of the bottom surface of the separation plate; a second spring is connected between each sliding rod and the middle part of the separation plate; each sliding rod is hinged with a plurality of hooks; each hook moves upward and penetrates the separation plate; each hook is also hinged with the separation plate; the filter plate is connected with the connecting pipe; A boss extends from the inner wall of the shell; the top surface of the boss is provided with a first inclined surface smoothly transitioning to the top surface of the separation disc; the two sides of the boss are respectively provided with second inclined surfaces for cooperating with the slide rod; the separation disc and the filter disc are both rotatably matched with the boss.

9. The multi-stage dewatering river sludge comprehensive treatment device according to claim 4 is characterized in that: A conical portion is provided at the bottom of the centrifugal portion; the conical portion is movably abutted against the drain cover; and fourth drain holes are evenly distributed on the conical surface of the conical portion along the circumferential direction.

10. A comprehensive treatment method based on the multi-stage dewatering river sludge comprehensive treatment device according to any one of claims 1 to 9, characterized in that: The steps include: S1: Preliminary filtration, which performs primary treatment on the sludge through the primary filtration component and introduces the filtered sludge into the centrifuge tube; S2: One-stage centrifugal extrusion dehydration, the centrifugal tube is driven to rotate by the centrifugal drive assembly, so that the sludge flowing through the centrifugal tube is dehydrated under the combined action of centrifugal force and extrusion force; S3: Secondary centrifugal extrusion dehydration, the sludge after the first centrifugal extrusion dehydration is transported to the extrusion chamber through the centrifugal drive assembly, and the sludge is dehydrated under the combined action of centrifugal force and extrusion force during the transportation process; S4: Three-time centrifugal extrusion dehydration, the centrifugal tube drives the extrusion ring to rotate, and the extrusion block squeezes the sludge in the extrusion chamber, so that the sludge is dehydrated under the combined action of centrifugal force and extrusion force.

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