A domestic sludge dewatering apparatus

Abstract

The application discloses a kind of domestic sludge dewatering equipment, it is related to sludge dewatering technical field, including dehydration workstation, dehydration workstation is set to circular ring, the outer side wall of dehydration workstation is fixedly connected with multiple supporting legs, the outer side wall of dehydration workstation is fixedly connected with stand, dehydration assembly is arranged on stand, and dehydration assembly includes the top cover fixedly connected in the top of stand.The large particle impurities in sludge are separated from it by filter cartridge, which can reduce the large particle impurities contained in the sludge spun dry, avoid the influence of large particle impurities on subsequent biomass fuel particle manufacturing, improve the uniformity of biomass fuel manufacturing particles, avoid the wear and tear of filter screen caused by hard large particles during sludge dewatering, avoid the problem that sludge is left in the scratch or damage caused by hard large particle impurities, prevent the sludge from being left in the scratch or damage and being inconvenient to clean, and improve the effectiveness of subsequent sludge dewatering.

Description

Technical Field

[0001] This invention relates to the field of sludge dewatering technology, and more specifically, to a domestic sludge dewatering device. Background Technology

[0002] With the increasing global energy importance and growing environmental awareness, finding alternative clean energy sources has become a top priority. Sludge, as a byproduct of urban wastewater treatment, has significant social and economic value in its resource utilization. It can be converted into biomass energy fuel. In the process of processing sludge into biomass energy fuel, it is necessary to dewater the sludge, then add combustion aids or additives to the dewatered sludge, and finally use a granulation mechanism to make biomass fuel pellets.

[0003] However, sludge collected from domestic sewage, cow dung, pipe silt, and river silt inevitably contains various large particles of impurities due to long-term accumulation, such as stones or hard plastic particles. These large particles are mostly hard materials, which can easily clog the inside of the pelletizer when the sludge is dewatered and used to manufacture biomass fuel pellets, leading to damage to the pelletizer. In addition, large plastic or stone particles can impact and scrape the inner wall of the dewatering equipment during high-speed rotation, causing wear and reducing its service life; it can even lead to internal damage to the dewatering equipment. Therefore, sludge tends to accumulate at the damaged areas of the dewatering equipment during the dewatering process, leaving sludge residue inside that is difficult to clean. Damaged dewatering equipment also reduces the effectiveness of sludge dewatering and increases maintenance costs. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention provides a domestic sewage sludge dewatering device.

[0005] The technical solution is as follows: A domestic sewage sludge dewatering device includes a dewatering workbench, which is circular in shape. Multiple legs are fixedly connected to the outer wall of the dewatering workbench, and columns are fixedly connected to the outer wall of the dewatering workbench. Dewatering components are installed on the columns. The dewatering assembly includes a top cover fixedly connected to the top of the column, a dewatering tank located below the top cover, a servo motor fixedly connected to the bottom of the dewatering tank, a centrifuge tank fixedly connected to one end of the servo motor output shaft located inside the dewatering tank, a filter screen adhered to the inner wall of the centrifuge tank, a filter cylinder fixedly connected to the upper surface of the centrifuge tank, an electric flip door rotatably connected inside the filter cylinder funnel, and a discharge hopper fixedly connected inside the dewatering workbench.

[0006] Furthermore, a drain outlet is provided at the bottom of the dehydration tank, and a drain pipe is connected to the drain outlet of the dehydration tank. The centrifuge tank consists of a circular plate at the bottom and a mesh bucket fixed on its upper surface. The filter cylinder consists of a vertical rod and a strainer frame. A gap is left between the strainer bucket of the filter cylinder and the inner wall of the filter screen. The top cover consists of an L-shaped frame and a cover plate. The cover plate of the top cover is adapted to the shape of the inner wall of the dehydration tank.

[0007] Furthermore, a flipping assembly is provided on the column. The flipping assembly includes two electric threaded rods fixedly connected to both sides of the column. A lifting frame is fitted on the outer wall of the column. Four abutment wheels are rotatably connected to both the upper and lower ends of the lifting frame. A rotating rod is rotatably connected to the lifting frame. The side of the rotating rod away from the column is fixedly connected to the dehydration tank. A flipping rod is fixedly connected to the side of the rotating rod close to the column. A flipping groove is opened on the side of the column close to the rotating rod.

[0008] Furthermore, the inner sides of the lifting frame are respectively connected to two electric threaded rods, and the contact wheels are all in contact with the outer wall of the column and roll. The lifting frame is provided with a rotating hole. The flipping rod is composed of a swing rod and a slider. The slider of the flipping rod slides inside the flipping groove. The flipping groove is composed of two vertical grooves at the top and bottom and a Y-shaped groove in the middle.

[0009] Furthermore, a scraping assembly is provided at the bottom of the column. The scraping assembly includes a fixed frame that is fixedly connected to the bottom of the column. A transmission gear is rotatably connected to the bottom of the fixed frame. A rotating shaft is fixedly connected to each side of the transmission gear. The rotating shafts extend to both sides of the fixed frame. Two lifting rods are fixedly connected to the ends of the two rotating shafts. The four legs are arranged in pairs. Two fixed plates are fixedly connected between the two legs in each pair. A lifting groove is opened on each of the two fixed plates. A lifting rod is slidably connected between the two lifting grooves. A bevel gear is rotatably connected to the middle of the lifting rod. A crushing rod is fixedly connected to the top of the bevel gear. A collection basin is fixedly connected to the top of the conical disc of the crushing rod. The size of the collection basin is adapted to the size of the filter cartridge funnel.

[0010] Furthermore, a strip groove is provided at the end of the lifting rod away from the rotating shaft, and the two ends of the lifting rod slide in the strip grooves of the two lifting rods. Two limiting grooves are provided on each of the two fixed plates, and limiting blocks are fixedly connected to both ends of the lifting rod. The limiting blocks of the lifting rod slide in the limiting grooves. The crushing rod is composed of a conical disc and an L-shaped rod. The L-shaped rod of the crushing rod is in the same vertical position as the gap between the filter cartridge funnel and the filter screen.

[0011] Furthermore, the scraping assembly includes a fixed ring fixedly connected to the lifting rod, a transmission rod rotatably connected to the fixed ring, a bevel gear II fixedly connected to one end of the transmission rod near the lifting rod, a toothed groove on a leg corresponding to the position of the transmission rod, a plurality of protruding teeth fixedly connected to one end of the transmission rod extending into the toothed groove, and a toothed rod slidably connected to the side of the column away from the dehydration workbench.

[0012] Furthermore, bevel gear two meshes with bevel gear one, the convex teeth mesh with the tooth grooves, and the bottom of the rack meshes with the transmission teeth.

[0013] Based on the above, the beneficial effects of the domestic sewage sludge dewatering equipment of the present invention are as follows: By separating large particles of impurities from the sludge using a filter cartridge, the amount of large particles in the sludge after dewatering can be reduced, thus preventing these large particles from affecting the subsequent production of biomass fuel pellets. This improves the uniformity of the biomass fuel pellets and prevents hard, large particles from wearing down the filter screen during sludge dewatering. In addition, it also prevents sludge residue from scratches or damage that makes it difficult to clean, thereby improving the effectiveness of subsequent sludge dewatering. By directly flipping the dewatering component and making it shake, large particles of impurities can fall onto the collection basin, achieving the effect of automatically collecting large particles of impurities. At the same time, direct flipping can prevent the accumulation of large particles of impurities, avoid residues during impurity collection, and improve the effectiveness of impurity collection. In addition, shaking can also loosen the sludge attached to the filter screen, making it easier to collect the sludge. The sludge is scraped off the inner side of the filter screen by a shredder, allowing the sludge to detach from the screen. The rotating L-shaped shredder also agitates the sludge during scraping, causing it to fall downwards under gravity. When the falling sludge comes into contact with the rotating L-shaped shredder, it is broken up, thus preventing the sludge from clumping. Breaking up the sludge facilitates secondary processing, reduces the need for manual sludge breaking, and improves the efficiency of sludge preparation for biomass fuel pellets. Attached Figure Description

[0014] Figure 1 This is a three-dimensional schematic diagram of the overall components of the present invention; Figure 2 This is a three-dimensional schematic diagram of the components of the present invention, including the electric threaded rod, lifting frame, and flipping groove. Figure 3 This is a three-dimensional schematic diagram of the rotating rod, flipping groove, and other components of the present invention; Figure 4 For the present invention Figure 3 3D schematic diagram of component at point A; Figure 5 This is a three-dimensional cross-sectional view of the overall components of the present invention; Figure 6 This is a three-dimensional schematic diagram of the components of the present invention, including the dehydration tank, centrifuge tank, filter screen, and filter cylinder. Figure 7 This is a three-dimensional schematic diagram of the transmission gear, rotating shaft, lifting rod, and other components of the present invention. Figure 8 For the present invention Figure 5 3D schematic diagram of component at point B; Figure 9 This is a three-dimensional schematic diagram of the components of the present invention, including the crushing rod, tooth groove, fixing plate, and lifting groove. Figure 10 For the present invention Figure 9 A 3D schematic diagram of the component at point C.

[0015] The reference numerals in the accompanying drawings of this invention are as follows: 1. Dehydration workbench; 2. Support legs; 3. Column; Flipping assembly: 41. Electric threaded rod; 42. Lifting frame; 43. Abutting wheel; 44. Rotating rod; 45. Flipping rod; 46. Flipping groove; Dewatering components: 51. Dewatering drum; 52. Servo motor; 53. Centrifuge drum; 54. Filter screen; 55. Filter cartridge; 551. Electric flip door; 56. Top cover; 57. Discharge hopper; Scraping assembly: 61. Fixing frame; 62. Transmission gear; 63. Rotating shaft; 64. Lifting rod; 65. Fixing plate; 66. Lifting groove; 67. Lifting rod; 68. Bevel gear one; 69. Crushing rod; 691. Collection basin; 610. Fixing ring; 611. Transmission rod; 612. Bevel gear two; 613. Gear groove; 614. Convex tooth; 615. Gear bar. Detailed Implementation

[0016] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0017] The embodiments provided by the present invention will be described in detail below: like Figures 1 to 4 As shown, a domestic sewage sludge dewatering device includes a dewatering workbench 1, which is configured as a ring shape. Multiple support legs 2 arranged in a ring are fixedly connected to the outer wall of the dewatering workbench 1 by bolts. A column 3 is fixedly connected to the outer wall of the dewatering workbench 1, and a turning component for turning over the sludge is provided on the column 3. The flipping assembly includes two electric threaded rods 41 fixedly connected to both sides of the column 3. Grooves are provided on both sides of the column 3, and the electric threaded rods 41 are rotatably mounted within these grooves. A lifting frame 42 is fitted onto the outer wall of the column 3. The inner sides of the lifting frame 42 are threadedly connected to the two electric threaded rods 41 respectively. Four abutment wheels 43 are rotatably connected to both the upper and lower ends of the lifting frame 42. The abutment wheels 43 all roll against the outer wall of the column 3, and are only used to abut against the column 3 to maintain the lifting frame. 42. For the stability of the vertical movement, a rotating rod 44 is rotatably connected to the lifting frame 42. The lifting frame 42 has a rotating hole for the rotating rod 44 to rotate. A flipping rod 45 is fixedly connected to the side of the rotating rod 44 near the column 3 and the end that passes through the lifting frame 42. The flipping rod 45 consists of a swing rod and a slider. A flipping groove 46 is provided on the side of the column 3 near the rotating rod 44. The slider of the flipping rod 45 slides inside the flipping groove 46. The flipping groove 46 consists of two vertical grooves and a Y-shaped groove in the middle.

[0018] like Figure 1 , Figure 2 , Figures 5 to 7 As shown, a dewatering assembly for dewatering sludge using centrifugation is provided on the rotating rod 44. The dewatering assembly includes a dewatering tank 51 fixedly connected to the rotating rod 44 on the side away from the column 3 by bolts. A drain outlet is provided at the bottom of the dewatering tank 51, and a drain pipe is connected to the drain outlet of the dewatering tank 51. A servo motor 52 is fixedly connected to the bottom of the dewatering tank 51. The output shaft of the servo motor 52 extends into the interior of the dewatering tank 51. A centrifuge tank 53 is fixedly connected to one end of the servo motor 52 located inside the dewatering tank 51. The centrifuge tank 53 consists of a circular plate at the bottom and a mesh barrel fixed to its upper surface. A filter screen 54 is adhered to the inner wall of the mesh barrel of the centrifuge tank 53, and a filter cylinder 55 is fixedly connected to the upper surface of the circular plate of the centrifuge tank 53. The filter cartridge 55 consists of a vertical rod and a funnel. A gap is left between the funnel and the inner wall of the filter screen 54. The vertical rod is fixedly connected to the bottom of the inner cavity of the centrifuge tank 53. An electric flap door 551 is rotatably connected inside the funnel of the filter cartridge 55. The electric flap door 551 is driven by a motor to rotate and is rotatably connected to the middle of the funnel of the filter cartridge 55. The electric flap door 551 is disc-shaped. A top cover 56 is fixedly connected to the top of the column 3. The top cover 56 consists of an L-shaped frame and a cover plate. The cover plate of the top cover 56 is adapted to the shape of the inner wall of the dewatering tank 51 to effectively seal the top of the dewatering tank 51. A sludge feeding port is opened in the middle of the top cover 56. An opening corresponding to the feeding port is opened in the middle of the electric flap door 551. A discharge hopper 57 is fixedly connected inside the dewatering workbench 1. The discharge hopper 57 is vertically concentric with the dewatering tank 51.

[0019] like Figure 1 , Figure 5 , Figures 7 to 10As shown, the bottom of the column 3 is provided with a scraping assembly for lifting and rotating to scrape off the sludge on the inner wall of the filter screen 54. The scraping assembly includes a fixed frame 61 fixedly connected to the bottom of the column 3. A transmission gear 62 is rotatably connected to the bottom of the fixed frame 61. A rotating shaft 63 is fixedly connected to each side of the transmission gear 62. The rotating shafts 63 extend to both sides of the fixed frame 61. The ends of the two rotating shafts 63 are fixedly connected to two lifting rods 64 by bolts. A strip groove is opened at the end of the lifting rod 64 away from the rotating shaft 63. Two fixed plates 65 are fixedly connected between the support legs 2 on the two sides of the two lifting rods 64 on the dewatering workbench. Each fixed plate 65 has a lifting groove 66, and a lifting rod 67 is slidably connected between the two lifting grooves 66. The two ends of the lifting rod 67 slide within the strip grooves of the two lifting rods 64. Each fixed plate 65 has two limiting grooves, symmetrical about the lifting grooves 66. Limiting blocks are fixedly connected to both ends of the lifting rod 67, and these blocks slide within the limiting grooves to stabilize the vertical movement of the lifting rod 67 and prevent rotation during vertical movement. A bevel gear 68 is rotatably connected to the middle of the lifting rod 67, and a crushing rod 69 is fixedly connected to the top of the bevel gear 68. The crushing rod 69 consists of a conical disc and an L-shaped rod. The conical disc of the crushing rod 69 prevents sludge from accumulating on its surface as it falls. The L-shaped rod of the crushing rod 69 is in the same vertical position as the gap between the filter cylinder 55 funnel and the filter screen 54. The L-shaped rod of the crushing rod 69 can be effectively inserted into the gap and fit against the inner wall of the filter screen 54, so that the L-shaped rod of the crushing rod 69 can effectively agitate the sludge on the inner wall of the filter screen 54. The top of the conical disc of the crushing rod 69 is fixedly connected to the collection basin 691, and the size of the collection basin 691 is adapted to the size of the filter cylinder 55 funnel. It is used to effectively dock with the collection basin 691 when the filter cylinder 55 funnel moves downward, so that large particles of impurities in the filter cylinder 55 funnel fall into the collection basin 691.

[0020] like Figure 1 , Figure 5 , Figures 7 to 10 As shown, the scraping assembly includes a fixed ring 610 fixedly connected to the lifting rod 67, a transmission rod 611 rotatably connected to the fixed ring 610, a bevel gear 612 fixedly connected to one end of the transmission rod 611 near the lifting rod 67, the bevel gear 612 meshing with the bevel gear 68, a toothed groove 613 is provided on a leg 2 corresponding to the position of the transmission rod 611, a plurality of protruding teeth 614 arranged in a ring array are fixedly connected to one end of the transmission rod 611 extending into the toothed groove 613, the protruding teeth 614 meshing with the toothed groove 613, a toothed rod 615 is slidably connected to the side of the column 3 away from the dehydration workbench 1, the bottom of the toothed rod 615 meshing with the transmission tooth 62.

[0021] It should be noted that the rack 615 can slide on the side of the column 3 without disengaging from the track set for it by the column 3, and will not disengage from other directions due to gravity or other reasons. This is because the actual structure of this part is that a limiting slide rail is opened on the side of the column 3, and the rack 615 is slidably set on the slide rail. Since this structure is relatively simple, it is not shown in detail in the attached drawings.

[0022] It should be noted that the conical disc of the crushing rod 69 can cover the meshing part of the first bevel gear 68 and the second bevel gear 612 at the bottom, so as to prevent the sludge from sticking to the meshing part of the first bevel gear 68 and the second bevel gear 612 during the sludge dumping process, and prevent the meshing and transmission of the first bevel gear 68 and the second bevel gear 612 from being obstructed due to the sludge sticking.

[0023] Based on the above preferred embodiments, the following is the complete working process and working principle of the above embodiments: The initial state is: The lifting frame 42 is at the highest position of the electric threaded rod 41. Therefore, both the lifting frame 42 and the rotating rod 44 are at the highest position of the column 3. The rotating rod 44 causes the slider of the flipping rod 45 to be at the highest position of the flipping groove 46. The rotating rod 44 causes the dewatering assembly to be at the highest position. The top cover 56 is in contact with the top of the dewatering barrel 51. The electric flip door 551 remains horizontal and always keeps the top of the filter cartridge 55 funnel sealed. The lifting rod 67 is at the lowest position of the lifting groove 66. The lifting rod 67 causes the end of the lifting rod 64 away from the rotating shaft 63 to be in a drooping state. The lifting rod 64 drives the transmission gear 62 to drive the gear 615 to the highest position through the rotating shaft 63. The transmission rod 611 is at the lowest position of the tooth groove 613.

[0024] The dewatering unit dewaters the sludge: In the process of preparing biomass fuel pellets, the sludge used to prepare the biomass fuel pellets needs to be dewatered to reduce the water content in the sludge. However, most of the sludge is collected from domestic sewage, cow manure, and pipeline sludge, and it is inevitable that the sludge will contain hard, large particulate impurities. When the biomass fuel pellets are subsequently manufactured by the pelletizer, the hard, large particulate impurities will affect the operation of the pelletizer.

[0025] The operator feeds the sludge to be dewatered into the dewatering tank 51 through the feeding port on the top cover 56. The sludge flows from the feeding hole on the top cover 56 into the funnel of the filter cartridge 55. Large particles of impurities in the sludge are separated by the filter cartridge 55 and remain in the funnel of the filter cartridge 55. The sludge then flows from the funnel of the filter cartridge 55 into the centrifuge tank 53. At this time, some water in the sludge permeates from the filter screen 54 to the outside of the centrifuge tank 53. Then, the operator starts the servo motor 52, and the output shaft of the servo motor 52 drives the centrifuge tank 53 to rotate inside the dewatering tank 51. During the rotation of the centrifuge tank 53, the sludge rotates synchronously inside the centrifuge tank 53. The centrifugal force generated by the rotation causes the water in the sludge to be thrown out of the centrifuge tank 53, while the sludge remains inside the centrifuge tank 53 under the action of the filter screen 54. Under the action of centrifugal force, some sludge will adhere to the inner side of the filter screen 54. At the same time, the rotation of the centrifuge tank 53 will also drive the filter cylinder 55 to rotate synchronously. When the filter cylinder 55 rotates, the sludge attached to the large particles of impurities remaining in its sieve hopper will be thrown out, thus separating the sludge from the large particles of impurities.

[0026] The water that is spun out accumulates at the bottom of the dewatering tank 51 and flows into the drain pipe through the drain outlet, thus achieving dewatering of the sludge and reducing its water content. The filter cartridge 55 separates large particles from the sludge, reducing the amount of large particles in the sludge and preventing them from affecting subsequent biomass fuel pellet production. This improves the uniformity of biomass fuel pellets, prevents wear on the filter screen 54 caused by hard, large particles during sludge dewatering, and also prevents sludge residue from scratches or damage that would be difficult to clean, thus improving the effectiveness of subsequent sludge dewatering.

[0027] Pour out impurities: After the sludge dewatering is complete, the servo motor 52 is turned off, and its output shaft no longer drives the centrifuge tank 53 to rotate. At this point, the operator starts the electric threaded rod 41. The rotation of the electric threaded rod 41 causes the lifting frame 42 to move downwards on the outer surface of the column 3. The lifting frame 42 drives the contact wheel 43 to roll downwards on the surface of the column 3. As the lifting frame 42 moves downwards, it also drives the rotating rod 44 to move downwards synchronously. The rotating rod 44 then drives the dewatering tank 51 to move downwards, and the dewatering tank 51 is no longer in contact with the top cover 56. The rotating rod 44 also drives the flipping rod 45 to move downwards synchronously. The slider of the flipping rod 45 will first... The flipping rod 45 moves downward in the vertical groove at the top of the flipping groove 46. When the slider of the flipping rod 45 moves into the Y-shaped groove of the flipping groove 46, the swing rod of the flipping rod 45 tilts under the guidance of the Y-shaped groove of the flipping groove 46. As the flipping rod 45 continues to move downward, the slider of the flipping rod 45 is restricted by the Y-shaped groove of the flipping groove 46, causing the swing rod of the flipping rod 45 to drive the rotating rod 44 to rotate in the rotating hole. The rotating rod 44 drives the dewatering tank 51 to rotate synchronously. After the dewatering tank 51 rotates, it will also drive the centrifuge tank 53 inside it to rotate synchronously. The centrifuge tank 53 drives the filter cylinder 55 to rotate synchronously. At this time, the funnel of the filter cylinder 55 faces downward.

[0028] When the filter cartridge 55 is already tilting downwards, the electric flip door 551 blocks the strainer hopper of the filter cartridge 55, preventing large particles of impurities from falling out due to their weight. As the lifting frame 42 continues to move downwards, it drives the rotating rod 44 downwards, which in turn drives the flipping rod 45 downwards. The slider of the flipping rod 45 slides downwards within the Y-shaped groove of the flipping groove 46. Guided by the Y-shaped groove, the slider of the flipping rod 45 causes the swing arm of the flipping rod 45 to rotate, driving the rotating rod 44 to continue rotating. When the slider of the flipping rod 45 slides into the vertical groove at the bottom of the flipping groove 46, the swing arm of the flipping rod 45 rotates 180 degrees, and the flipping rod 45... The swing rod drives the dewatering barrel 51 to rotate 180 degrees synchronously via the rotating rod 44, so that the dewatering barrel 51 can remain vertically downward. At this time, the funnel of the filter cartridge 55 will be aligned with the collection basin 691. At this time, the motor of the electric flip door 551 can be controlled by the controller to drive the disc to rotate 90 degrees. At this time, the disc of the electric flip door 551 is perpendicular to the funnel of the filter cartridge 55, so the electric flip door 551 no longer blocks the funnel of the filter cartridge 55, and some large particles of impurities fall into the collection basin 691 under the action of gravity.

[0029] As the lifting frame 42 continues to move downward, the lifting frame 42, together with the rotating rod 44, will drive the flipping rod 45 to continue moving downward. When the slider of the flipping rod 45 moves to the lowest position at the bottom vertical groove of the flipping groove 46, the funnel of the filter cylinder 55 will contact the top of the collection basin 691. At the same time, because the slider of the flipping rod 45 contacts the bottom end of the bottom vertical groove of the flipping groove 46, an impact vibration will be generated during the contact process. This vibration will be transmitted to the dewatering barrel 51 through the rotating rod 44, which will cause the dewatering barrel 51 to also vibrate. After the dewatering barrel 51 vibrates, the centrifuge barrel 53 and the filter cylinder 55 will also vibrate synchronously. At this time, large particles of impurities adhering to the funnel of the filter cylinder 55 will fall off through the vibration. The vibration of the centrifuge barrel 53 will also loosen the sludge adhering to the filter screen 54.

[0030] By directly flipping the dewatering component and causing it to shake, large particles of impurities can fall onto the collection basin 691, achieving the effect of automatically collecting large particles of impurities. At the same time, direct flipping can prevent the accumulation of large particles of impurities, avoid residues during impurity collection, and improve the effectiveness of impurity collection. In addition, shaking can also loosen the sludge attached to the filter screen 54, making it easier to collect the sludge.

[0031] The scraping assembly removes sludge from the surface of filter screen 54. As the lifting frame 42 continues to move downward, it also drives the dehydration tank 51 downward via the rotating rod 44. The downward movement of the lifting frame 42 will abut against the toothed rod 615, thereby pushing the toothed rod 615 downward on the outer surface of the column 3. When the toothed rod 615 moves downward, it will mesh with the transmission gear 62 and rotate within the fixed frame 61. When the transmission gear 62 rotates, it will drive the lifting rod 64 to rotate upward via the rotating shaft 63. The lifting rod 64 drives the lifting rod 67 to move upward within the lifting groove 66. During this process, the lifting rod 67 will slide within the strip groove of the lifting rod 64, thereby ensuring that the lifting rod 67 can slide vertically upward within the lifting groove 66. The lifting rod 67 also drives the crushing rod 69 to move upward synchronously through the bevel gear 68. During the upward movement of the crushing rod 69, its L-shaped rod will insert into the gap between the inverted filter screen 54 and the filter cylinder 55. At the same time, when the lifting rod 67 moves upward, it will drive the transmission rod 611 to move upward synchronously through the fixing ring 610. When the transmission rod 611 moves upward, it will drive the convex tooth 614 to move upward inside the tooth groove 613. When the convex tooth 614 moves upward in the tooth groove 613, the meshing of the tooth groove 613 will drive the convex tooth 614 and the transmission rod 611 to rotate. The transmission rod 611 drives the bevel gear 612 to rotate, the bevel gear 612 drives the bevel gear 68 to rotate, and the bevel gear 68 drives the crushing rod 69 to rotate. At this time, the rotating crushing rod 69 L-shaped rod will scrape off the sludge attached to the inner side of the filter screen 54. The sludge on the inner side of the filter screen 54 is scraped off by the rotating crushing rod 69, allowing the sludge to detach from the filter screen 54. The rotating L-shaped rod of the crushing rod 69 can also turn the sludge over during the scraping process. The falling sludge will fall downwards under the action of gravity. When the falling sludge comes into contact with the rotating L-shaped rod of the crushing rod 69, it will be broken up by the L-shaped rod of the crushing rod 69, thereby preventing the sludge from clumping. Breaking up the sludge facilitates secondary processing of the sludge, reduces the need for manual sludge breaking, and improves the efficiency of sludge in the preparation of biomass fuel pellets.

[0032] It should be noted that because the size of the funnel of the filter cartridge 55 is similar to that of the collection basin 691, and the gap between the filter cartridge 55 and the funnel is larger than shown in the figure, the falling sludge will not enter the collection basin 691. It will only fall downwards from the outside of the collection basin 691. Furthermore, when the slider of the flipping rod 45 touches the bottom of the bottom vertical groove of the flipping groove 46, the filter cartridge 55 still maintains a certain distance from the bottom of the collection basin 691. There will be no situation where the filter cartridge 55 and the collection basin 691 collide, preventing the lifting frame 42 from moving downwards. At this time, some sludge will also flow down the outer wall of the collection basin 691 to the bottom of the collection basin 691 and fall downwards under the guidance of the conical disc of the crushing rod 69, without accumulating on the surface of the crushing rod 69.

[0033] After the sludge is crushed, workers can collect it under the dewatering workbench 1. Then, the collected sludge is dried. Next, the workers manually mix the sludge with solvents such as combustion aids or calorific value enhancers. After mixing the sludge with the combustion aids or calorific value enhancers, a granulator is used to granulate the sludge mixed with the combustion aids or calorific value enhancers to form biomass fuel pellets. The addition of combustion aids or calorific value enhancers to sludge biomass fuel pellets can improve combustion efficiency.

[0034] 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 within the protection scope of the present invention.

Claims

1. A sewage sludge dewatering device, characterized in that, Includes a dehydration workbench (1), which is set in a circular shape. Multiple support legs (2) are fixedly connected to the outer wall of the dehydration workbench (1), and a column (3) is fixedly connected to the outer wall of the dehydration workbench (1). A dehydration component is set on the column (3). The dewatering assembly includes a top cover (56) fixedly connected to the top of the column (3), a dewatering tank (51) is provided below the top cover (56), a servo motor (52) is fixedly connected to the bottom of the dewatering tank (51), a centrifuge tank (53) is fixedly connected to one end of the output shaft of the servo motor (52) located inside the dewatering tank (51), a filter screen (54) is bonded to the inner side wall of the centrifuge tank (53), a filter cylinder (55) is fixedly connected to the upper surface of the centrifuge tank (53), an electric flip door (551) is rotatably connected inside the filter cylinder (55) sieve hopper, and a discharge hopper (57) is fixedly connected inside the dewatering workbench (1).

2. The sewage sludge dewatering equipment according to claim 1, characterized in that, The bottom of the dehydration tank (51) is provided with a drain outlet, and a drain pipe is connected to the drain outlet of the dehydration tank (51). The centrifuge tank (53) consists of a circular plate at the bottom and a mesh bucket fixed on its upper surface. The filter cylinder (55) consists of a vertical rod and a strainer frame. There is a gap between the strainer of the filter cylinder (55) and the inner wall of the filter screen (54). The top cover (56) consists of an L-shaped frame and a cover plate. The cover plate of the top cover (56) is adapted to the shape of the inner wall of the dehydration tank (51).

3. The sewage sludge dewatering equipment according to claim 1, characterized in that, A flipping assembly is provided on the column (3). The flipping assembly includes two electric threaded rods (41) fixedly connected to both sides of the column (3). A lifting frame (42) is sleeved on the outer wall of the column (3). Four abutting wheels (43) are rotatably connected to both the upper and lower ends of the lifting frame (42). A rotating rod (44) is rotatably connected to the lifting frame (42). The side of the rotating rod (44) away from the column (3) is fixedly connected to the dehydration bucket (51). A flipping rod (45) is fixedly connected to the side of the rotating rod (44) close to the column (3). A flipping groove (46) is opened on the side of the column (3) close to the rotating rod (44).

4. The sewage sludge dewatering equipment according to claim 3, characterized in that, The inner sides of the lifting frame (42) are threadedly connected to two electric threaded rods (41), and the contact wheels (43) all roll against the outer side wall of the column (3). The lifting frame (42) has a rotating hole. The flipping rod (45) is composed of a swing rod and a slider. The slider of the flipping rod (45) slides inside the flipping groove (46). The flipping groove (46) is composed of two vertical grooves and a Y-shaped groove in the middle.

5. The sewage sludge dewatering equipment according to claim 2, characterized in that, A scraping assembly is provided at the bottom of the column (3). The scraping assembly includes a fixed frame (61) that is fixedly connected to the bottom of the column (3). A transmission gear (62) is rotatably connected to the bottom of the fixed frame (61). A rotating shaft (63) is fixedly connected to each side of the transmission gear (62). The rotating shaft (63) extends to both sides of the fixed frame (61). Two lifting rods (64) are fixedly connected to the ends of the two rotating shafts (63). The dehydration workbench (1) is supported by legs (2) on the two sides of the two lifting rods (64). Two fixed plates (65) are fixedly connected between them. Each fixed plate (65) has a lifting groove (66). A lifting rod (67) is slidably connected between the two lifting grooves (66). A bevel gear (68) is rotatably connected to the middle of the lifting rod (67). A crushing rod (69) is fixedly connected to the top of the bevel gear (68). A collection basin (691) is fixedly connected to the top of the conical disc of the crushing rod (69). The size of the collection basin (691) is compatible with the size of the sieve hopper of the filter cartridge (55).

6. The sewage sludge dewatering equipment according to claim 5, characterized in that, The lifting rod (64) has a strip groove at one end away from the rotating shaft (63). The two ends of the lifting rod (67) slide in the strip grooves of the two lifting rods (64). Two limiting grooves are opened on the two fixed plates (65). Limiting blocks are fixedly connected to both ends of the lifting rod (67). The limiting blocks of the lifting rod (67) slide in the limiting grooves. The crushing rod (69) is composed of a conical disc and an L-shaped rod. The L-shaped rod of the crushing rod (69) is in the same vertical position as the gap between the filter cylinder (55) funnel and the filter screen (54).

7. The sewage sludge dewatering equipment according to claim 5, characterized in that, The scraping assembly includes a fixed ring (610) fixedly connected to the lifting rod (67), a transmission rod (611) rotatably connected to the fixed ring (610), a bevel gear (612) fixedly connected to one end of the transmission rod (611) near the lifting rod (67), a toothed groove (613) is provided on a leg (2) corresponding to the position of the transmission rod (611), a plurality of protruding teeth (614) are fixedly connected to one end of the transmission rod (611) extending into the toothed groove (613), and a toothed rod (615) is slidably connected to the side of the column (3) away from the dehydration workbench (1).

8. The sewage sludge dewatering equipment according to claim 7, characterized in that, Bevel gear 2 (612) meshes with bevel gear 1 (68), convex tooth (614) meshes with tooth groove (613), and the bottom of tooth bar (615) meshes with transmission tooth (62).

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