Sludge dewatering device

Abstract

The invention relates to the technical field of sludge dewatering, and discloses a sludge dewatering device which comprises a centrifugal mechanism and a sludge briquetting mechanism, the centrifugal mechanism comprises an outer barrel, the sludge briquetting mechanism comprises a material collecting barrel, the outer barrel is connected with the end of the material collecting barrel, a center shaft is arranged in the middle of the outer barrel, and the center shaft is connected with the material collecting barrel. The extending end of the center shaft penetrates out of the material collecting barrel, a water outlet and a sludge outlet are formed in the position, located in the outer barrel body, of the center shaft, and a main sludge outlet and an auxiliary sludge outlet are formed in the position, located in the material collecting barrel, of the center shaft; according to the sludge dewatering device disclosed by the invention, the central shaft is arranged and drives the extrusion device to act, small blocky sludge discharged from the central shaft is extruded into large blocky sludge by the extrusion device and finally forms semi-circular fan-shaped columnar blocks, and the semi-circular fan-shaped columnar blocks are discharged out of the material collecting barrel, so that centralized discharge of the sludge is facilitated, and transportation and centralized processing after sludge dewatering are facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of sludge dewatering, in particular to a sludge dewatering device. Background Art

[0002] Sludge dewatering is a sludge treatment method that removes moisture from flowing primary, concentrated or digested sludge and converts it into semi-solid or solid mud blocks. After dewatering, the sludge is usually landfilled, used as organic fertilizer, produced as building materials, or recycled for energy. The sludge containing straw can be processed into biofuels such as biodiesel, providing a new way for energy supply.

[0003] Centrifugal sludge dewatering machine is a commonly used sludge dewatering equipment in the current market. It uses the centrifugal force generated by high-speed rotation to achieve solid-liquid separation. It has strong processing capacity and high dewatering efficiency. It can process a large amount of sludge in a short time, and the moisture content of the obtained mud cake is relatively low. However, the existing centrifugal sludge dewatering machine still has shortcomings in actual use: after the sludge is separated from the water, the sludge is transported to the outside of the cylinder through the internal channel of the central axis. The discharged sludge is in small pieces and needs to be collected in a container. It is difficult to centrally process it during transportation and later processing. In addition, in the process of processing sludge containing solid impurities, the straw in the sludge is large in volume, and the sludge moves slowly from the internal channel of the central axis, which affects the sludge discharge efficiency. Summary of the invention

[0004] The invention provides a sludge dewatering device to solve the problem that the existing sludge is difficult to be centrally treated in transportation and later treatment after dewatering.

[0005] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a sludge dewatering device, comprising a centrifugal mechanism and a sludge briquetting mechanism, wherein the centrifugal mechanism comprises an outer cylinder, and the sludge briquetting mechanism comprises a collecting barrel, wherein the outer cylinder is connected to the end of the collecting barrel, a central axis is arranged in the middle of the outer cylinder, and an extended end of the central axis passes through the outside of the collecting barrel, the central axis is located inside the outer cylinder and is provided with a water discharge port and a mud discharge port, and the central axis is located inside the collecting barrel and is provided with a main mud discharge hole and an auxiliary mud discharge hole; An extrusion device is arranged inside the collecting barrel between the main mud outlet hole and the auxiliary mud outlet hole, the central axis passes through the middle of the extrusion device, the extrusion device comprises a central slide seat, both side walls of the central slide seat are provided with cutting plates, a first spring is arranged on one side of the cutting plate, a pressure plate is arranged at the end of the first spring, and two sets of movable discharge plates are arranged on the outer wall of the collecting barrel; The top and bottom of the central slide seat are both provided with sliders extending to the outside of the collecting barrel, the extended ends of the two sliders are both provided with threaded rods, and the extended end of the central shaft is provided with a reversing mechanism for driving the threaded rod to rotate.

[0006] Preferably, the centrifugal mechanism also includes a feed box, a support seat is provided on the outside of the feed box, a base is fixed to the bottom of the support seat, one end of the feed box is connected to the end of the outer cylinder, the outer wall of the central axis is provided with spiral blades, the outer wall of the spiral blades is provided with an inner cylinder, the inner cylinder is fixed to the inner wall of the outer cylinder, the end of the inner cylinder close to the collecting barrel is conical, and an end plate is fixed to the conical end of the inner cylinder, and the mud discharge port is located at the conical end of the central axis close to the inner cylinder.

[0007] Preferably, a driving device for driving the central shaft to rotate is provided on one side of the feed box, a water outlet is opened on the side of the central shaft close to the driving device, a water outlet pipe is connected to one side of the water outlet, a partition is provided on the inside of the central shaft close to the mud discharge port, the central shaft is a hollow structure, the inside of the central shaft on one side of the partition is a water flow channel, and the other side is a mud discharge channel, the drain port, water outlet and water outlet pipe are all connected to the water flow channel.

[0008] Preferably, a left block and a right block are further provided inside the collecting barrel, a first collecting cavity is opened between the left block and the extrusion device, a second collecting cavity is opened between the right block and the extrusion device, each group of the unloading plates includes two semicircular arc plates, and the two groups of the unloading plates are respectively located on both sides of the first collecting cavity and the second collecting cavity, and fixed seats are symmetrically provided on both sides of the collecting barrel, a cylinder is fixed on the fixed seat, and the telescopic end of the cylinder is connected to the outer wall of the unloading plate.

[0009] Preferably, the top and the bottom of the collecting barrel are both provided with slide grooves, and the sliding block slides in the slide grooves.

[0010] Preferably, a reduction gear box is provided at the end of the central shaft, and a driving gear is provided at the end of the output shaft of the reduction gear box.

[0011] Preferably, the reversing mechanism includes a main shaft arranged on one side of the driving gear, a driven gear and a reversing gear are fixed on the outside of the main shaft, the driven gear is meshed with the driving gear, an intermediate gear shaft is arranged on one side of the main shaft, an intermediate gear is fixed on the outside of the intermediate gear shaft, the intermediate gear is meshed with the reversing gear, and a screw gear is arranged on the outside of the threaded rod, and the screw gear can be meshed with the driven gear or the intermediate gear.

[0012] Preferably, a mounting seat is provided at the end of the main shaft, an electric push rod is provided on one side of the mounting seat, the telescopic end of the electric push rod is connected to a guide rod, a clamping block is fixed at the end of the guide rod, and an axle seat is fixed at the end of the clamping block, the axle seat is provided with two bearings, and the main shaft and the intermediate gear shaft pass through the two bearings respectively.

[0013] In the above technical solution, the technical effects and advantages provided by the present invention are: (1) A central axis is set up, which runs through the centrifugal mechanism, and a collecting barrel is set at the extended end of the central axis outside the centrifugal mechanism. An extrusion device is set inside the collecting barrel. The extrusion device is driven by the central axis to move. The small sludge blocks discharged from the central axis are squeezed into large blocks by the extrusion device, and finally form semicircular fan-shaped column blocks and are discharged from the collecting barrel, which is conducive to the centralized discharge of sludge, thereby facilitating the transportation and centralized processing of sludge after dehydration.

[0014] (2) A reversing mechanism is provided, and a reduction box is provided between the reversing mechanism and the central shaft. The central shaft drives the internal structure of the centrifugal mechanism to separate the sludge and water, and at the same time drives the reduction mechanism and the reversing mechanism inside the reduction box to rotate. After the position of the gears in the reversing mechanism changes, the extrusion device moves in the opposite direction. By adjusting the gear position of the reversing mechanism, the extrusion device can move back and forth in the collecting barrel, so that the sludge in the collecting barrel can be continuously squeezed left and right, so that the accumulated sludge in the collecting barrel can be handled in time, and the problem of sludge clogging in the central shaft and the collecting barrel can be avoided, which is conducive to the smooth discharge of sludge.

[0015] (3) A crushing assembly is arranged outside the central axis in the collecting barrel. The crushing assembly is located outside the mud outlet of the central axis. During the rotation of the central axis, the crushing assembly remains stationary. After the sludge is discharged from the mud outlet, it is quickly cut by the cutter head of the crushing assembly. Impurities such as straw mixed in the sludge can be cut into smaller particles. The smaller particle size can increase the contact area between microorganisms and straw, making it easier for microorganisms to attach to and decompose cellulose, hemicellulose and other difficult-to-degrade substances in the straw, thereby accelerating the decomposition rate of straw in the sludge and shortening the treatment cycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a structural schematic diagram of the centrifugal mechanism of the present invention; Figure 3 is a three-dimensional diagram of the centrifugal mechanism of the present invention; Figure 4 It is a three-dimensional diagram of the sludge briquetting mechanism of the present invention; Figure 5It is a schematic structural diagram of the reduction box and the reversing mechanism of the present invention; Figure 6 It is a stereoscopic diagram of the reduction box and the reversing mechanism of the present invention; Figure 7 It is a schematic diagram of the internal structure of the collecting barrel of the present invention; Figure 8 It is a structural schematic diagram of the left stopper and the crushing assembly of the present invention; Fig. 9 A perspective view of a crushing assembly of the present invention; Fig.10 An exploded view of the crushing assembly of the present invention; Fig.11 is a three-dimensional diagram of a cutter head of the present invention; Fig.12 is a three-dimensional diagram of the extrusion device of the present invention; Fig.13 It is an exploded view of the extrusion device of the present invention.

[0018] In the figure: 1. Driving device; 2. Feed box; 3. Outer cylinder; 4. Water outlet pipe; 5. Support seat; 6. Collecting cylinder; 7. Fixed seat; 8. Cylinder; 9. Discharge plate; 10. Reversing mechanism; 101. Main shaft; 102. Driven gear; 103. Reversing gear; 104. Intermediate gear shaft; 105. Intermediate gear; 106. Screw gear; 107. Driving gear; 108. Shaft seat; 109. Electric push rod; 1091. Guide rod; 11. Mounting seat; 12. Central axis; 13. Water outlet; 14. Spiral blade; 15. Inner cylinder; 16. Drainage outlet; 17. Mud discharge outlet; 18. Partition plate; 19. Main mud discharge hole; 20. Auxiliary mud discharge hole; 21. End plate; 22. Base; 23. Threaded rod; 24. Sliding block; 25. Speed ​​reducer; 26. Clamp block; 27, left stopper; 271, right stopper; 28. Extrusion device; 281. Center slide; 282. Pressing plate; 283. First spring; 284. Cutting plate; 29. First material collecting chamber; 30. Second material collecting chamber; 31. Crushing assembly; 311. Cutting head; 312. Support block; 32. Slide groove; 33. Groove; 34. Mud outlet; 35. Second spring; 36. Telescopic rod; 37. Support sheet; 38. Blade; 39. Through hole. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] like Figure 1-Figure 13 As shown, a sludge dewatering device includes a centrifugal mechanism and a sludge briquetting mechanism, the centrifugal mechanism includes an outer cylinder 3, the sludge briquetting mechanism includes a collecting barrel 6, the outer cylinder 3 is connected to the end of the collecting barrel 6, a central axis 12 is arranged in the middle of the outer cylinder 3, the extended end of the central axis 12 passes through the outside of the collecting barrel 6, the central axis 12 is located inside the outer cylinder 3 and is provided with a water discharge port 16 and a mud discharge port 17, and the central axis 12 is located inside the collecting barrel 6 and is provided with a main mud discharge hole 19 and an auxiliary mud discharge hole 20; An extrusion device 28 is provided inside the collecting barrel 6 between the main mud outlet hole 19 and the auxiliary mud outlet hole 20. The central axis 12 passes through the middle of the extrusion device 28. The extrusion device 28 includes a central slide 281. Both side walls of the central slide 281 are provided with cutting plates 284. A first spring 283 is provided on one side of the cutting plate 284. A pressure plate 282 is provided at the end of the first spring 283. Two sets of movable discharge plates 9 are provided on the outer wall of the collecting barrel 6. The top and bottom of the central slide 281 are both provided with sliders 24 extending to the outside of the collecting barrel 6, the extended ends of the two sliders 24 are both provided with threaded rods 23, and the extended end of the central shaft 12 is provided with a reversing mechanism 10 for driving the threaded rod 23 to rotate.

[0021] During the sludge dewatering process, the sludge is transported to the feed box 2 through an external sludge pump. Due to the gravity of the sludge itself, the sludge flows into the centrifugal mechanism. Under the centrifugal action of the centrifugal mechanism, the sludge is separated from the water and the reversing mechanism 10 is driven to rotate through the central shaft 12. During the rotation of the reversing mechanism 10, the threaded rod 23 is driven to rotate, and the slider 24 moves on the threaded rod 23. The slider 24 drives the extrusion device 28 to move. The extrusion device 28 moves back and forth left and right. The extrusion device 28 squeezes the sludge multiple times. Since the side wall of the central slide 281 is provided with a cutting plate 284, during each extrusion process, the pressing plate 282 squeezes the sludge. The pressing plate 282 is subjected to the resistance of the sludge. The pressing plate 282 squeezes the first spring 283 to be compressed, and the cutting plate 284 is exposed to the outside. The cutting plate 284 cuts the cylindrical sludge block into two semicircular fan-shaped column blocks. After the discharge plate 9 is opened, the semicircular fan-shaped column blocks fall to the outside of the collecting barrel 6.

[0022] like Figure 1-Figure 3As shown, the centrifugal mechanism also includes a feed box 2, a support seat 5 is arranged outside the feed box 2, a base 22 is fixed to the bottom of the support seat 5, one end of the feed box 2 is connected to the end of the outer cylinder 3, a spiral blade 14 is arranged on the outer wall of the central axis 12, an inner cylinder 15 is arranged outside the spiral blade 14, the inner cylinder 15 is fixed to the inner wall of the outer cylinder 3, one end of the inner cylinder 15 close to the collecting barrel 6 is conical, and an end plate 21 is fixed to the conical end of the inner cylinder 15, and the mud discharge port 17 is located at the conical end of the central axis 12 close to the inner cylinder 15; A driving device 1 for driving the central shaft 12 to rotate is provided on one side of the feed box 2. A water outlet 13 is provided on the side of the central shaft 12 close to the driving device 1. A water outlet pipe 4 is connected to one side of the water outlet 13. A partition 18 is provided on the inner side of the central shaft 12 close to the mud discharge port 17. The central shaft 12 is a hollow structure. The inner side of the central shaft 12 located on one side of the partition 18 is a water flow channel, and the other side is a mud discharge channel. The drain port 16, the water outlet 13 and the water outlet pipe 4 are all connected to the water flow channel. During the dehydration process, the driving device 1 drives the central shaft 12 to rotate at a high speed. It should be noted that in the prior art, the driving device 1 of the centrifugal sludge dehydrator mainly includes a centrifugal motor driving the central shaft 12, and the central shaft 12 rotates at a speed of 2500-3000 rpm. During the high-speed rotation of the central shaft 12, due to the different densities of sludge and water, the sludge is thrown to the inner wall of the inner cylinder 15 under the influence of centrifugal force, and a sludge layer is formed. The water in the sludge is separated from the sludge and is located on the inner side of the sludge layer. Finally, the water enters the water flow channel from the drain port 16, then flows to the water outlet 13, and is discharged from the water outlet pipe 4. The sludge layer is pushed to the conical end of the inner cylinder 15 by the spiral blades 14, and enters the sludge discharge channel from the sludge discharge port 17. The sludge moves along the sludge discharge channel to the main sludge discharge hole 19 and the auxiliary sludge discharge hole 20, and is finally discharged from the main sludge discharge hole 19 and the auxiliary sludge discharge hole 20.

[0023] like Figure 1 and Figure 7 As shown, a left stopper 27 and a right stopper 271 are further provided inside the collecting barrel 6, a first collecting cavity 29 is opened between the left stopper 27 and the extrusion device 28, a second collecting cavity 30 is opened between the right stopper 271 and the extrusion device 28, each group of unloading plates 9 includes two semicircular arc plates, and the two groups of unloading plates 9 are respectively located on both sides of the first collecting cavity 29 and the second collecting cavity 30, and fixed seats 7 are symmetrically provided on both sides of the collecting barrel 6, and a cylinder 8 is fixed on the fixed seat 7, and the telescopic end of the cylinder 8 is connected to the outer wall of the unloading plate 9; specifically, during the shortening process of the cylinder 8, the telescopic end of the cylinder 8 pulls the unloading plate 9, and the unloading plate 9 is separated from the collecting barrel 6, and the first collecting cavity 29 and the second collecting cavity 30 in the collecting barrel 6 are in an open state, and the semicircular fan-shaped columns located in the first collecting cavity 29 and the second collecting cavity 30 fall to the outside of the collecting barrel 6, and after the cylinder 8 is extended, the unloading plate 9 returns to its original position.

[0024] like Figure 1 as well as Figure 4-Figure 7 As shown, a reduction box 25 is provided at the end of the central shaft 12, the input shaft of the reduction box 25 is connected to the end of the central shaft 12 through a coupling, and a driving gear 107 is provided at the end of the output shaft of the reduction box 25; the reduction box 25 has a multi-stage gear reduction mechanism inside, and the specific gear reduction mechanism has been disclosed in the prior art and will not be described in detail here; like Figure 1 as well as Figure 4-Figure 7 As shown, the top and bottom of the collecting barrel 6 are both provided with a slide groove 32, and the slider 24 slides in the slide groove 32. The reversing mechanism 10 includes a main shaft 101 arranged on one side of the driving gear 107, and a driven gear 102 and a reversing gear 103 are fixed to the outside of the main shaft 101. The driven gear 102 is meshed with the driving gear 107. An intermediate gear shaft 104 is arranged on one side of the main shaft 101, and an intermediate gear 105 is fixed to the outside of the intermediate gear shaft 104. The intermediate gear 105 is meshed with the reversing gear 103. A screw gear 106 is arranged on the outside of the threaded rod 23, and the screw gear 106 can be meshed with the driven gear 102 or the reversing gear 103. A mounting seat 11 is provided at the end of the main shaft 101, an electric push rod 109 is provided on one side of the mounting seat 11, a guide rod 1091 is connected to the telescopic end of the electric push rod 109, a clamping block 26 is fixed to the end of the guide rod 1091, a shaft seat 108 is fixed to the end of the clamping block 26, and the shaft seat 108 is provided with two bearings, and the main shaft 101 and the intermediate gear shaft 104 respectively penetrate the two bearings; In the reversing operation, by starting the electric push rod 109, when the electric push rod 109 is extended, the telescopic end of the electric push rod 109 pushes the guide rod 1091, the guide rod 1091 pulls the clamping block 26, the clamping block 26 drives the shaft seat 108, the shaft seat 108 drives the main shaft 101 and the intermediate gear shaft 104, the main shaft 101 drives the driven gear 102, before this, the central shaft 12 always keeps rotating in the same direction, the input shaft of the reduction box 25 has the same direction of rotation as the central shaft 12, the speed reduction mechanism inside the reduction box 25 always keeps rotating in the same direction, the output shaft of the reduction box 25 keeps rotating in the same direction, the driving gear 107 keeps rotating in the same direction, and the driven gear 102 keeps rotating in the same direction; When the driven gear 102 rotates, the screw gear 106 is driven to rotate. At this time, the screw gear 106 drives the threaded rod 23 to rotate. During the rotation of the threaded rod 23, the slider 24 moves horizontally on the threaded rod 23, and the slider 24 drives the extrusion device 28 to move to the side of the left stopper 27; When the electric push rod 109 is shortened, the telescopic end of the electric push rod 109 pulls the guide rod 1091, the guide rod 1091 pushes the clamping block 26, the clamping block 26 pushes the shaft seat 108, the shaft seat 108 pushes the intermediate gear shaft 104 and the main shaft 101 to move, the main shaft 101 pushes the reversing gear 103 to move, the intermediate gear shaft 104 pushes the intermediate gear 105 to move, the intermediate gear 105 engages with the screw gear 106, at this time the direction of rotation of the screw gear 106 changes, the rotation direction of the threaded rod 23 also changes, the slider 24 moves in the opposite direction, the extrusion device 28 moves to the right, and cooperates with the right stopper 271 to extrude the sludge discharged from the auxiliary mud outlet 20.

[0025] like Figure 7-Figure 11 As shown, the ends of the left stopper 27 and the right stopper 271 are both provided with a crushing assembly 31, the crushing assembly 31 comprises a cutter head 311, the cutter head 311 comprises a plurality of annular blades 38, each blade 38 has a through hole 39 in the middle, and the outer wall of the cutter head 311 is symmetrically provided with two mud outlets 34, and the mud outlets 34 are communicated with the through holes 39; A support sheet 37 is provided at the end of the cutter head 311, and a plurality of second springs 35 and a plurality of telescopic rods 36 are provided at the end of the support sheet 37. Another support sheet 37 is provided at the ends of the second springs 35 and the telescopic rods 36. A support block 312 is fixed to the end surface of the support sheet 37. A groove 33 is provided at the ends of the left stopper 27 and the right stopper 271, and the support block 312 is fixed in the groove 33. After dehydration, the sludge enters the interior of the central shaft 12 from the sludge discharge port 17, and moves to the main sludge discharge hole 19 and the auxiliary sludge discharge hole 20 along the sludge discharge channel. As the central shaft 12 rotates continuously, the sludge is thrown out from the main sludge discharge hole 19 and the auxiliary sludge discharge hole 20. At the moment of throwing out, the blade 38 cuts and crushes the sludge and impurities such as straw mixed in the sludge, so that the impurities such as straw in the sludge are more finely broken. The finer the straw is cut, the easier it is to release the nutrients such as nitrogen, phosphorus, potassium and various trace elements therein, and the faster it can be used by microorganisms in the sludge, and then converted into nutrients that can be absorbed by plants, thereby improving the fertilizer efficiency of the sludge. Among them, the fine straw particles can be better mixed with the sludge, making the texture of the sludge looser, and enhancing the air permeability and water permeability, which is conducive to the growth and reproduction of aerobic microorganisms in the sludge, and further improving the treatment effect and stability of the sludge; Specifically, during the process of the extrusion device 28 extruding the sludge, during the process of the extrusion device 28 moving toward the left block 27 or the right block 271, the pressure plate 282 contacts the cutter head 311 of the crushing assembly 31 and squeezes the cutter head 311, the cutter head 311 pushes the support sheet 37, the support sheet 37 squeezes the second spring 35 and the telescopic rod 36, the second spring 35 is compressed, and the telescopic rod 36 is shortened, and the cutter head 311 moves into the groove 33 of the left block 27 or the right block 271, so that the surfaces of the pressure plate 282 and the left block 27 or the right block 271 squeeze the sludge against each other and compact the sludge into a plate shape. During the process of the extrusion device 28 reciprocating left and right, when it is not in contact with the cutter head 311, the second spring 35 bounces the cutter head 311 back to its original position.

[0026] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A sludge dewatering device, comprising a centrifugal mechanism and a sludge briquetting mechanism, characterized in that: The centrifugal mechanism comprises an outer cylinder (3), and the sludge briquetting mechanism comprises a collecting barrel (6). The outer cylinder (3) is connected to the end of the collecting barrel (6). A central axis (12) is provided in the middle of the outer cylinder (3). The extended end of the central axis (12) passes through the outside of the collecting barrel (6). The central axis (12) is located inside the outer cylinder (3) and is provided with a water discharge port (16) and a sludge discharge port (17). The central axis (12) is located inside the collecting barrel (6) and is provided with a main sludge discharge hole (19) and an auxiliary sludge discharge hole (20). An extrusion device (28) is provided inside the collecting barrel (6) between the main mud outlet hole (19) and the auxiliary mud outlet hole (20); the central axis (12) passes through the middle of the extrusion device (28); the extrusion device (28) comprises a central slide seat (281); both side walls of the central slide seat (281) are provided with cutting plates (284); a first spring (283) is provided on one side of the cutting plate (284); a pressure plate (282) is provided at the end of the first spring (283); and two sets of movable discharge plates (9) are provided on the outer wall of the collecting barrel (6); The top and bottom of the central slide seat (281) are both provided with sliders (24) extending toward the outside of the collecting barrel (6), the extended ends of the two sliders (24) are both provided with threaded rods (23), and the extended end of the central shaft (12) is provided with a reversing mechanism (10) for driving the threaded rods (23) to rotate.

2. A sludge dewatering device according to claim 1, characterized in that: The centrifugal mechanism further comprises a feed box (2), the outside of which is provided with a support seat (5), the bottom of which is fixed with a base (22), one end of the feed box (2) is connected to the end of the outer cylinder (3), the outer wall of the central axis (12) is provided with a spiral blade (14), the outside of which is provided with an inner cylinder (15), the inner cylinder (15) is fixed to the inner wall of the outer cylinder (3), the end of the inner cylinder (15) close to the collecting barrel (6) is conical, and the conical end of the inner cylinder (15) is fixed with an end plate (21), and the mud discharge port (17) is located at the conical end of the central axis (12) close to the inner cylinder (15).

3. A sludge dewatering device according to claim 2, characterized in that: A driving device (1) for driving the central shaft (12) to rotate is arranged on one side of the feed box (2); a water outlet (13) is provided on a side of the central shaft (12) close to the driving device (1); a water outlet pipe (4) is connected to one side of the water outlet (13); a partition plate (18) is arranged on the inner side of the central shaft (12) close to the mud discharge port (17); the central shaft (12) is a hollow structure; the inner side of the central shaft (12) located on one side of the partition plate (18) is a water flow channel, and the other side is a mud discharge channel; the drainage port (16), the water outlet (13) and the water outlet pipe (4) are all in communication with the water flow channel.

4. A sludge dewatering device according to claim 1, characterized in that: A left stopper (27) and a right stopper (271) are further provided inside the collecting barrel (6); a first collecting cavity (29) is provided between the left stopper (27) and the extrusion device (28); a second collecting cavity (30) is provided between the right stopper (271) and the extrusion device (28); each group of the discharge plates (9) comprises two semicircular arc plates; the two groups of the discharge plates (9) are respectively located on both sides of the first collecting cavity (29) and the second collecting cavity (30); fixed seats (7) are symmetrically provided on both sides of the collecting barrel (6); a cylinder (8) is fixed on the fixed seat (7); and the telescopic end of the cylinder (8) is connected to the outer wall of the discharge plate (9).

5. A sludge dewatering device according to claim 1, characterized in that: The top and bottom of the collecting barrel (6) are both provided with sliding grooves (32), and the sliding block (24) slides in the sliding grooves (32).

6. A sludge dewatering device according to claim 1, characterized in that: A reduction gear box (25) is provided at the end of the central shaft (12), and a driving gear (107) is provided at the end of the output shaft of the reduction gear box (25).

7. A sludge dewatering device according to claim 6, characterized in that: The reversing mechanism (10) comprises a main shaft (101) arranged on one side of a driving gear (107); a driven gear (102) and a reversing gear (103) are fixed to the outside of the main shaft (101); the driven gear (102) is meshed with the driving gear (107); an intermediate gear shaft (104) is arranged on one side of the main shaft (101); an intermediate gear (105) is fixed to the outside of the intermediate gear shaft (104); the intermediate gear (105) is meshed with the reversing gear (103); and a screw gear (106) is arranged on the outside of the threaded rod (23); the screw gear (106) can be meshed with the driven gear (102) or the intermediate gear (105).

8. A sludge dewatering device according to claim 7, characterized in that: A mounting seat (11) is provided at the end of the main shaft (101), an electric push rod (109) is provided on one side of the mounting seat (11), a telescopic end of the electric push rod (109) is connected to a guide rod (1091), a clamping block (26) is fixed at the end of the guide rod (1091), a shaft seat (108) is fixed at the end of the clamping block (26), two bearings are provided on the shaft seat (108), and the main shaft (101) and the intermediate gear shaft (104) respectively penetrate the two bearings.

9. A sludge dewatering device according to claim 4, characterized in that: A crushing assembly (31) is provided at the end of each of the left stopper (27) and the right stopper (271). The crushing assembly (31) comprises a cutter head (311). The cutter head (311) comprises a plurality of annular blades (38). A through hole (39) is provided in the middle of each of the blades (38). Two mud outlets (34) are symmetrically provided on the outer wall of the cutter head (311). The mud outlets (34) are in communication with the through holes (39).

10. A sludge dewatering device according to claim 9, characterized in that: A support sheet (37) is provided at the end of the cutter head (311), a plurality of second springs (35) and a plurality of telescopic rods (36) are provided at the end of the support sheet (37), another support sheet (37) is provided at the ends of the second springs (35) and the telescopic rods (36), a support block (312) is fixed to the end surface of the support sheet (37), and grooves (33) are provided at the ends of the left stopper (27) and the right stopper (271), and the support block (312) is fixed in the groove (33).

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