Multi-stage dewatering type river sludge comprehensive treatment device and comprehensive treatment method

Abstract

The application discloses a kind of multistage dewatering type riverway sludge comprehensive treatment device and comprehensive treatment method, including shell, primary filter component, centrifugal driving assembly and centrifugal tube;Centrifugal tube includes connecting pipe, conical spiral pipe and centrifugal part;Connecting pipe one end is connected with primary filter component;The large diameter end and small diameter end of conical spiral pipe are connected with the other end of connecting pipe and centrifugal part;Conical spiral pipe is equipped with first drain hole;Centrifugal driving assembly is located in centrifugal part;Centrifugal driving assembly is equipped with first transmission part, and second transmission part is arranged in shell;Shell side wall is equipped with sludge outlet;Corresponding sludge outlet position in shell is rotatably provided with extrusion ring connected with centrifugal driving assembly;Extrusion ring is movably provided with extrusion block;Extrusion ring is equipped with second drain hole;Extrusion ring, extrusion block and shell inner wall form extrusion cavity;Realize multistage processing to sludge, improve the dewatering effect of sludge, and the dewatering efficiency is higher, small in size, easy to install and maintain, to reduce energy consumption and failure rate.

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 sector, existing integrated sludge dewatering systems are generally bulky and difficult to install and maintain. These systems often utilize a single physical or chemical dewatering technology, such as screw pressing, belt filter pressing, and centrifugal separation. While these technologies can remove water from sludge to a certain extent, their low dewatering efficiency makes it difficult to significantly reduce the sludge's moisture content.

[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 comprehensive treatment method to realize multi-stage treatment of sludge, improve the dewatering effect of sludge, achieve lower moisture content and higher sludge treatment capacity, and 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 solutions of the present invention are as follows:

[0006] The first aspect of the present invention provides a multi-stage dewatering river sludge comprehensive treatment device, comprising a housing; a primary filter assembly is rotatably provided on the top of the housing, and a centrifugal drive assembly and a centrifugal tube are provided inside the housing;

[0007] The centrifuge tube includes a connecting tube, a conical spiral tube, and a centrifugal part; one end of the connecting tube is connected to the primary filter 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 provided with first drainage holes; a centrifugal drive assembly is provided in the centrifugal part; the centrifugal drive assembly is provided with a first transmission member, and a second transmission member that cooperates with the first transmission member is provided in the housing, so that the centrifugal drive assembly drives the centrifuge tube to rotate;

[0008] A mud outlet is provided on the side wall of the shell; an extrusion ring connected to the centrifugal drive assembly is rotatably provided at a position corresponding to the mud outlet in the shell; an extrusion block is movably provided inside 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.

[0009] Optionally, the inner diameter of the conical spiral tube gradually decreases from top to bottom.

[0010] Optionally, a fixing block is provided on the extrusion ring; and a first spring is provided between the fixing block and the extrusion block.

[0011] 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 provided in the groove.

[0012] Optionally, the first transmission member is a gear; the second transmission member is a ring gear.

[0013] 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 a third drainage hole; 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 movable 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.

[0014] Optionally, the pitch of the spiral blades decreases gradually from bottom to top.

[0015] Optionally, the primary filter assembly includes a filter disc and a separation disc arranged on the filter disc; a gap is formed between the periphery of the separation disc and the inner periphery of the filter disc; a plurality of sliding rods are uniformly distributed along the circumference of the bottom surface of the separation disc; a second spring is connected between each sliding rod and the middle portion of the separation disc; each sliding rod is hingedly connected to a plurality of hooks; each hook moves upward and penetrates the separation disc; each hook is also hingedly connected to the separation disc; the filter disc is connected to the connecting pipe;

[0016] A boss extends from the inner wall of the shell; the top surface of the boss is provided with a first inclined surface that smoothly transitions to the top surface of the separation disc; second inclined surfaces for cooperating with the slide rod are provided on both sides of the boss; the separation disc and the filter disc are both rotatably engaged with the boss.

[0017] Optionally, 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.

[0018] 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:

[0019] Step S1: preliminary filtration, performing primary treatment on the sludge through the primary filtration component, and introducing the filtered sludge into the centrifuge tube;

[0020] Step S2: primary centrifugal extrusion dehydration, wherein the centrifugal drive assembly drives the centrifuge tube to rotate, so that the sludge flowing through the centrifuge tube is dehydrated under the combined action of centrifugal force and extrusion force;

[0021] Step S3: Secondary centrifugal extrusion dehydration, the sludge after the first centrifugal extrusion dehydration is transported to the extrusion chamber by the centrifugal drive assembly, and the sludge is dehydrated under the combined action of centrifugal force and extrusion force during the transportation process;

[0022] 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.

[0023] 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 dewatering effect of the sludge, achieving a lower moisture content and a higher sludge treatment capacity, and having a 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the present invention;

[0025] Figure 2 It is a cross-sectional schematic diagram of the present invention;

[0026] Figure 3 This is a schematic diagram of the structure of the present invention after the shell is hidden;

[0027] Figure 4 It is a structural schematic diagram of a centrifuge tube of the present invention;

[0028] Figure 5 It is a structural schematic diagram of the centrifugal drive assembly of the present invention;

[0029] Figure 6 is a cross-sectional schematic diagram of the centrifugal drive assembly of the present invention;

[0030] Explanation of the accompanying drawings: 1. Shell; 11. Mud outlet; 12. Drain cover; 13. Gear ring; 14. Boss; 141. First inclined surface; 142. Second inclined surface; 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

[0031] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, but the scope of implementation of the present invention is not limited thereto.

[0032] like Figures 1 to 6 As shown, the 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;

[0033] The centrifuge tube 4 includes a connecting tube 41, a conical spiral tube 42, and a centrifugal portion 43; one end of the connecting tube 41 is connected to the primary filter 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 portion 43; the conical spiral tube 42 is uniformly distributed with first drainage holes 44; the centrifugal drive assembly 3 is disposed in the centrifugal portion 43; the centrifugal drive assembly 3 is provided with a first transmission member, and a second transmission member that cooperates with the first transmission member is provided in the housing 1, so that the centrifugal drive assembly 3 drives the centrifuge tube 4 to rotate;

[0034] 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 in the shell 1 at a position corresponding to the mud outlet 11; 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, which is connected to the centrifugal part 43 through the centrifugal drive assembly 3.

[0035] 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 centrifuge tube 4 to rotate through the cooperation of the first transmission member and the second transmission member, and the centrifuge 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 filtration treatment on the sludge. The sewage filtered out of the primary filter enters the shell 1 and is then discharged. At the same time, large impurities are separated from the sludge, so that the large impurities do not enter the centrifuge tube 4, thereby preventing damage to the centrifuge tube 4 and the centrifugal drive assembly 3. The sludge after the primary filtration treatment enters the conical spiral tube 42 through the connecting pipe 41, thereby completing the preliminary filtration process;

[0036] 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 centrifugation and extrusion dehydration, the sludge enters the centrifugal part 43 along the conical spiral tube 42 and is precipitated, thereby completing one centrifugal extrusion dehydration process.

[0037] The centrifugal drive assembly 3 then transports the settled sludge into the extrusion chamber. During the transport 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 the secondary centrifugal extrusion dehydration enters the extrusion chamber, thereby improving the dehydration effect.

[0038] 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.

[0039] 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 dewatering effect of the sludge, achieving a lower moisture content and a higher sludge treatment capacity, and having a 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.

[0040] like Figure 2 As shown, in the multi-stage dewatering river sludge comprehensive treatment device of this embodiment, in some embodiments, the inner diameter of the conical spiral tube 42 gradually decreases from top to bottom; such a setting makes the sludge subjected to a greater extrusion force when flowing through the conical spiral tube 42, prompting the water in the sludge to be efficiently squeezed out, further improving the dewatering effect.

[0041] 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 separate 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 drain hole 54. 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.

[0042] like Figure 2 and Figure 3As shown, in some embodiments of the multi-stage dewatering river sludge comprehensive treatment device of this embodiment, a drain cover 12 is provided at the bottom of the housing 1, and the centrifugal portion 43 movably abuts against the top of the drain cover 12; a groove is provided at the top of the drain cover 12; and a second transmission member is disposed in the groove. In this embodiment, the drain cover 12 is provided so that the sewage separated in the housing 1 can be discharged from the housing 1 through the drain cover 12, thereby preventing the accumulation and overflow of water during the treatment process and optimizing the overall dewatering efficiency. The groove is provided to facilitate the installation of the second transmission member, so that the centrifugal portion 43 and the drain cover 12 cooperate more stably.

[0043] like Figure 5 and Figure 6 As shown, in the multi-stage dewatering river sludge comprehensive treatment device of this embodiment, in some embodiments, the first transmission member is a gear 34; the second transmission member is a ring gear 13; in actual use, the gear 34 is engaged with the ring gear 13, and the centrifugal drive assembly 3 drives the gear 34 to rotate. At the same time, under the action of the ring gear 13, the gear 34 performs a circular motion along the trajectory of the ring gear 13, thereby causing the entire centrifugal drive assembly 3 to perform 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.

[0044] 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 piece 33; the water filter cartridge 31 is inserted into the centrifugal part 43; the open end of the water filter cartridge 31 is connected to the centrifugal part 43; the peripheral wall of the water filter cartridge 31 is evenly distributed with third drainage holes 35; the power piece 33 is provided 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 movable through the centrifugal tube 4 and is connected to the first transmission member; a spiral blade 36 is 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 a conduit 37; the conduit 37 is connected to the extrusion chamber.

[0045] Specifically, the power member 33 is a motor. The motor drives the conical roller 32 to rotate, which in turn drives the gear 34 to rotate. The gear 34 cooperates with the ring gear 13 to drive the conical roller 32 in a circular motion, which in turn drives the water filter cartridge 31 in a circular motion. Because the conical roller 32 is eccentrically arranged, the water filter cartridge 31 drives the centrifuge tube 4 to rotate, thereby dehydrating the sludge in the centrifuge tube 4. The sludge after passing through the conical spiral tube 42 enters the centrifugal portion 43, where it remains stationary to allow the sewage in the sludge to separate. At the same time, due to the rotation of the conical roller 32, the sludge in the centrifugal portion 43 moves upward along the trajectory of the spiral blades 36, enters the water filter cartridge 31, and is further separated from the sludge through the third drainage hole 35 by centrifugal force, further reducing the water content of the sludge. In this way, under the action of the spiral blades 36, the sludge is transported into the extrusion chamber.

[0046] 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 transportation 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 moisture content.

[0047] 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 provided on the filter disc 21; a gap is provided between the periphery of the separation disc 22 and the inner periphery of the filter disc 21; a plurality of sliding rods 23 are uniformly distributed along the circumference of the bottom surface of the separation disc 22; each sliding rod 23 is connected to the middle part of the separation disc 22 by a second spring 24; each sliding rod 23 is hinged to 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;

[0048] 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 that smoothly transitions to the top surface of the separation disc 22; second inclined surfaces 142 for cooperating with the slide rod 23 are provided on both sides of the boss 14; the separation disc 22 and the filter disc 21 are both rotatably engaged with the boss 14.

[0049] During actual use, each hook 25 is initially biased toward the axial direction of the separation disc 22, and the sludge to be processed 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; the sludge after entering the filter disc 21 enters the conical spiral tube 42 through the connecting pipe 41 for dehydration.

[0050] 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.

[0051] like Figure 2 and Figure 4 As shown, in some embodiments of the multi-stage dewatering river sludge comprehensive treatment device of this embodiment, a conical portion 45 is provided at the bottom of the centrifugal portion 43; the conical portion 45 movably abuts against the drain cover 12; and the conical surface of the conical portion 45 is uniformly distributed along the circumference thereof with fourth drain holes 46. In this embodiment, the provision of the conical portion 45 guides the wastewater separated in the centrifugal portion 43 to be discharged from the centrifugal portion 43 through the fourth drain holes 46.

[0052] 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 by: It includes 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 shell; The centrifuge tube includes a connecting tube, a conical spiral tube, and a centrifugal part; one end of the connecting tube is connected to the primary filter 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 provided with first drainage holes; a centrifugal drive assembly is provided in the centrifugal part; the centrifugal drive assembly is provided with a first transmission member, and a second transmission member that cooperates with the first transmission member is provided in the housing, so that the centrifugal drive assembly drives the centrifuge tube to rotate; A mud outlet is provided on the side wall of the shell; an extrusion ring connected to the centrifugal drive assembly is rotatably provided in the shell corresponding to the mud outlet; 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; A fixing block is provided on the extrusion ring; a first spring is provided between the fixing block and the extrusion block; A drain cover is provided at the bottom of the housing, and the centrifugal part movably contacts the top of the drain cover; a groove is provided at the top of the drain cover; and a second transmission member is provided in the groove; The first transmission member is a gear; the second transmission member is a ring gear; The centrifugal drive assembly includes a water filter cartridge, a conical roller, and a power member; the water filter cartridge is inserted into the centrifugal portion; the open end of the water filter cartridge is connected to the centrifugal portion; a third drainage hole is uniformly distributed on the circumferential wall of the water filter cartridge; the power member is disposed at the closed end of the water filter cartridge; the conical roller is rotatably disposed within the water filter cartridge; the small-diameter end of the conical roller is movable 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; 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 via a conduit; the conduit is connected to the extrusion chamber; The primary filter assembly includes a filter disc and a separation disc arranged on the filter disc; a gap is formed between the periphery of the separation disc and the inner periphery of the filter disc; a plurality of sliding rods are evenly distributed along the circumference of the bottom surface of the separation disc; a second spring is connected between each sliding rod and the middle portion of the separation disc; each sliding rod is hingedly connected to a plurality of hooks; each hook moves upward and penetrates the separation disc; each hook is also hingedly connected to the separation disc; the filter disc is connected to 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 that smoothly transitions to the top surface of the separation disc; second inclined surfaces for cooperating with the slide rod are provided on both sides of the boss; the separation disc and the filter disc are both rotatably engaged with the boss.

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: The pitch of the spiral blades decreases gradually from bottom to top.

4. The multi-stage dewatering river sludge comprehensive treatment device according to claim 1, characterized in that: A conical portion is provided at the bottom of the centrifugal portion; the conical portion is in movably contact with the drain cover; and fourth drain holes are evenly distributed on the conical surface of the conical portion along the circumferential direction.

5. A comprehensive treatment method based on the multi-stage dewatering river sludge comprehensive treatment device according to any one of claims 1 to 4, 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: Primary centrifugal extrusion dehydration, the centrifugal drive assembly drives the centrifuge tube to rotate, so that the sludge flowing through the centrifuge 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-stage 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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