A suspended sludge granulator

Abstract

The present application relates to a kind of sludge granulator of suspension, including base, driving mechanism, box and support cavity, installation cavity and lubricating cavity being sequentially arranged above box, bottom plate, ring mould and guide circle are provided in the support cavity;Three compression roller assemblies are evenly provided in the installation cavity, each compression roller assembly includes eccentric sleeve, adjusting gear, compression roller shaft and compression roller;The eccentric sleeve is different shaft with compression roller shaft, material lifting frame is provided below the installation cavity, and material lifting frame and compression roller are alternately arranged in ring mould in ring direction;Gap adjusting mechanism is provided on the lubricating cavity, and the inner gear ring and speed reducer of tooth transmission connection are included in gap adjusting mechanism, and three adjusting gears are meshed with the inner gear ring respectively;Discharge pipe is provided on the lubricating cavity, and the lower end of discharge pipe extends downward and is placed in the middle part of ring mould.The present application solves the problems of uneven feeding, rotating part lubrication, difficult gap adjustment between roller mould, raw material overflow and component wear of sludge granulator.

Description

Technical Field

[0001] This invention relates to the field of sludge granulation technology, and more particularly to a suspended sludge granulator. Background Technology

[0002] The sludge granulator is one of the main pieces of equipment in sludge pyrolysis gasification projects, playing a crucial role. Test runs of the gasifier revealed that the granulation strength must meet certain requirements to ensure normal operation; otherwise, serious problems such as coking, slagging, excessive combustible dust, and grate blockage can easily occur.

[0003] The following problems have occurred during the operation of our existing sludge granulator: 1. The raw materials cannot be guided when entering the granulator, and the uniformity of material distribution in the granulation chamber cannot be guaranteed. 2. During the sludge granulation process, the proportional dimensions of the pressure roller die are not properly designed, resulting in an excessively small feed angle for the sludge granulation, which affects the normal feeding of the sludge forming pre-extrusion zone. Under the same ring die, the larger the diameter of the pressure roller and the larger the triangular extrusion range formed between the ring die and the pressure roller, the more beneficial the extrusion effect. Theoretically, the pressure roller diameter of single and double roller granulators can be made to the largest, and the extrusion time and extrusion effect should be the best. However, during machine operation, the force between the pressure roller and the die is transmitted between the main shaft, main shaft bearings, and empty shaft, etc. Therefore, the mechanical structures of the main shaft, main shaft bearings, and empty shaft of single and double roller granulators are large and do not conform to mechanical structure.

[0004] Other problems include: 3. The gap between the pressure roller and the die in the existing granulator cannot be effectively guaranteed. The existing granulator mainly uses worm gear or crank-connecting rod mechanisms for adjustment, resulting in high labor intensity for personnel. Adjustment of the gap requires machine shutdown, affecting normal production. 4. During operation, a large amount of powder accumulates at the bottom of the existing sludge granulator. The high proportion of silica in the sludge raw material causes wear on key components such as the bottom liner, die, and pressure roller cover. Therefore, solving the problem of bottom material accumulation has become a challenge for the equipment. 5. The sealing structure design of the sludge granulator is unreasonable, leading to lubricating oil contamination, ash leakage, and sludge intrusion into key components, causing wear. Summary of the Invention

[0005] To address the problems of uneven feeding, difficulty in adjusting roller die gap, and easy wear of key components in existing granulators, this invention provides a suspended sludge granulator that achieves uniform distribution of raw materials, automatic adjustment of roller die gap, and extends the life of key components.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A suspended sludge granulator includes a base, a drive mechanism, a housing, and a support cavity, an installation cavity, and a lubrication cavity arranged sequentially above the housing. The support cavity is provided with a base plate connected to the drive mechanism, a ring die coaxially arranged on the base plate, and a guide ring inclinedly arranged above the ring die. The support cavity has a notch, and a discharge plate that is inclined downwards is provided at the notch; The mounting cavity has a double-layer structure, and three pressure roller assemblies are arranged circumferentially inside the mounting cavity. Each pressure roller assembly includes an eccentric sleeve that is transferred into the mounting cavity, an adjusting gear that is keyed to the top of the eccentric sleeve, a pressure roller shaft that is transferred into the eccentric sleeve, and a pressure roller that is bolted to the bottom of the pressure roller shaft. The adjusting gear is placed in the lubrication cavity, the eccentric sleeve is not coaxial with the pressure roller shaft, a lifting frame is provided below the mounting cavity, and the lifting frame and pressure roller are arranged alternately in the ring mold in a circumferential direction; The lubrication cavity is provided with a gap adjustment mechanism, which includes an internal gear ring and a reducer connected by a gear transmission. The adjustment gears of the three pressure roller assemblies respectively mesh with the internal gear ring. The lubrication cavity is provided with a funnel-shaped feeding pipe, the lower end of which extends downward and is positioned in the middle of the ring die.

[0007] Furthermore, the drive mechanism is provided on the base. The drive mechanism includes a main motor and a mounting base on both sides of the base, a gearbox and a main shaft connected to the gearbox in the mounting base, and a coupling is provided between the main motor and the gearbox for connection. The main shaft is arranged vertically.

[0008] Furthermore, the housing is arranged above the mounting base, the main shaft extends out of the mounting base and is placed inside the housing, the main shaft is rotatably connected to the housing to ensure the stability of the main shaft rotation, and the top of the main shaft is keyed to the middle of the base plate to drive the base plate to rotate.

[0009] Furthermore, the supporting cavity is bolted to the top of the box body. The supporting cavity is an annular body. The bottom plate is rotatably arranged in the supporting cavity. The ring mold is bolted to the top of the bottom plate. The diameter of the ring mold is smaller than the diameter of the bottom plate. The guide ring is arranged on the upper edge of the ring mold. The guide ring is inclined towards the middle of the ring mold to reduce the inner diameter of the ring mold. The guide ring prevents the raw material from overflowing.

[0010] Furthermore, the mounting cavity is bolted to the top of the support cavity. The mounting cavity is annular and has three sets of mounting holes arranged circumferentially inside to facilitate the installation of the pressure roller assembly. The pressure roller assembly is arranged in each set of mounting holes.

[0011] Further, the upper part of the eccentric sleeve extends out of the upper layer of the installation cavity and is connected to the adjusting gear. A boss-shaped clamping ring is bolted to the lower part of the eccentric sleeve. The clamping ring is arranged outside the lower layer of the installation cavity. A sealing ring is arranged between the eccentric sleeve and the installation cavity. Both the upper and lower ends of the roller shaft are provided with self-aligning bearings. The roller shaft is arranged between the two self-aligning bearings. A round nut is threadedly connected above the roller shaft to limit the upper self-aligning bearing. The lower part of the roller shaft is in the shape of a stepped shaft. A limiting ring is sleeved on the lower part of the roller shaft. The limiting ring extends into the clamping ring and abuts against the lower self-aligning bearing. An oil seal is arranged between the limiting ring and the clamping ring to prevent the leakage of lubricating oil.

[0012] Further, the lower part of the roller shaft extends downward into the ring die. A roller cover and a roller are sleeved on the shoulder of the lower part of the roller shaft. The roller cover and the roller are arranged vertically. The roller cover and the roller are bolted and clamped to the shoulder of the roller shaft for fixation. The roller is installed in a suspended manner, which is convenient for installation and disassembly.

[0013] Further, the material lifting frame is bolted to the lower part of the installation cavity. The number of the material lifting frames is three. Each material lifting frame includes a "mouth"-shaped frame and a triangular plate-shaped material lifting plate. Blades are arranged around the front side of the frame. The material lifting plate is arranged at the bottom of the rear side of the frame. The material lifting plate is arranged obliquely upward.

[0014] Further, the lubrication cavity includes an upper cover body and a circular cover plate. The upper cover body is an annular body and is welded above the installation cavity. The internal gear ring is arranged in the upper cover body. The cover plate is bolted to the upper cover body. The reducer is arranged on the cover plate. The reducer includes a motor and a worm and worm gear reducer. The output shaft of the worm and worm gear reducer extends into the upper cover body and is rotationally connected to the upper layer of the installation cavity. A driving gear is key-connected to the output shaft of the worm and worm gear reducer. The driving gear meshes with the internal gear ring.

[0015] Further, the feeding pipe is bolted to the middle of the cover plate. The upper end of the feeding pipe is above the cover plate. The lower end of the feeding pipe sequentially passes through the lubrication cavity and the installation cavity and extends into the middle of the ring die.

[0016] Through the above technical solutions, the beneficial effects of the present invention are as follows: The feeding pipe of the present invention adopts a conical mouth for feeding. The designed conical mouth angle is between 60° and 75°, which prevents wall sticking and blockage during feeding, and effectively guarantees the even distribution of raw materials in the ring die. Lubricating oil can be added to the lubrication chamber in the lubrication cavity. The lubricating oil can lubricate the internal gear ring, the driving gear and the adjusting gear. At the same time, it can also lubricate the gap between the roller shaft and the eccentric sleeve, ensuring good lubrication of the rotating parts of the equipment, that is, ensuring the automatic lubrication effect of the gap adjustment mechanism and the roller assembly.

[0017] This invention employs a three-roller assembly with a rational structural design that conforms to mechanical principles, ensuring uniform stress distribution and minimizing damage. It also guarantees effective sludge extrusion and facilitates the compression process. The rollers are suspended, allowing for convenient replacement. Only the rollers are housed within the ring die; other components and the gap adjustment mechanism are located outside the support cavity. This external placement of the roller shaft rotation structure and gap adjustment mechanism reduces wear on critical components caused by sludge.

[0018] This invention can automatically adjust the gap between the pressure roller and the ring die for different types of ring dies. The gap adjustment mechanism can adjust the gap between the pressure roller and the ring die without stopping the machine. The speed reducer synchronously drives the rotation of three eccentric sleeves, ensuring that the gap adjustment between the three pressure rollers and the ring die is synchronized. The equipment is subjected to balanced force during operation, avoiding the tedious manual adjustment work. The appropriate gap size can reduce the wear of the ring die and pressure roller, and ensure the granulation quality. Attached Figure Description

[0019] Figure 1 This is an overall schematic diagram of a suspended sludge granulator according to the present invention.

[0020] Figure 2 This is a cross-sectional view of a suspended sludge granulator according to the present invention.

[0021] Figure 3 This is a cross-sectional view of the support cavity of a suspended sludge granulator according to the present invention.

[0022] Figure 4 This is a schematic diagram of the distribution of adjusting gears in a suspended sludge granulator according to the present invention.

[0023] Figure 5 This is a schematic diagram of the installation of the pressure roller assembly of a suspended sludge granulator according to the present invention.

[0024] Figure 6 This is a cross-sectional view of the pressure roller assembly of a suspended sludge granulator according to the present invention.

[0025] Figure 7 This is a schematic diagram of the roller distribution of a suspended sludge granulator according to the present invention.

[0026] Figure 8 This is a schematic diagram of the distribution of the lifting frame of a suspended sludge granulator according to the present invention.

[0027] The attached diagram is labeled as follows: 1 is the machine base, 2 is the housing, 3 is the support cavity, 4 is the mounting cavity, 5 is the lubrication cavity, 51 is the upper cover, 52 is the cover plate, 6 is the main motor, 7 is the mounting base, 8 is the gearbox, 9 is the main shaft, 10 is the base plate, 11 is the ring die, 12 is the guide ring, 13 is the discharge plate, 14 is the mounting hole, 15 is the eccentric sleeve, 16 is the adjusting gear, 17 is the pressure roller shaft, 18 is the pressure roller, 19 is the sealing ring, 20 is the retaining ring, 21 is the round nut, 22 is the limit ring, 23 is the oil seal, 24 is the pressure roller cover, 25 is the lifting frame, 251 is the frame, 252 is the lifting plate, 26 is the blade, 27 is the internal gear ring, 28 is the reducer, 29 is the drive gear, 30 is the self-aligning bearing, and 31 is the discharge pipe. Detailed Implementation

[0028] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings: like Figures 1-8 As shown, a suspended sludge granulator includes a base 1, a drive mechanism, a housing 2, and a support cavity 3, a mounting cavity 4, and a lubrication cavity 5 sequentially arranged above the housing 2. The drive mechanism is mounted on the base 1 and provides driving force for sludge granulation.

[0029] The drive mechanism includes a main motor 6 and a mounting base 7 on both sides of the base 1, a gearbox 8 in the mounting base 7 and a main shaft 9 connected to the gearbox 8. The main motor 6 is a YX3-B3 series three-phase asynchronous motor. A coupling is provided between the main motor 6 and the gearbox 8 for connection. The gearbox 8 is a right-angle gearbox.

[0030] The housing 2 is positioned above the mounting base 7. The main shaft 9 extends out of the mounting base 7 and is placed inside the housing 2. The main shaft 9 is rotatably connected to the housing 2. The main shaft 9 is vertically positioned and can be driven to rotate at high speed by the main motor 6. Specifically, the upper and lower ends of the main shaft 9 are rotatably connected to the housing 2 by self-aligning roller bearings and tapered roller bearings, respectively, to ensure the stability of the main shaft 9 during high-speed rotation.

[0031] In this embodiment, when the support cavity 3 is installed, the support cavity 3 is bolted to the top of the box 2. The support cavity 3 is an annular body, and the inside of the support cavity 3 is a granulation chamber.

[0032] The supporting cavity 3 contains a base plate 10 connected to the drive mechanism, a ring mold 11 coaxially mounted on the base plate 10, and a guide ring 12 inclined above the ring mold 11. The base plate 10 is rotatably mounted in the supporting cavity 3, that is, the main shaft 9 is keyed to the middle of the base plate 10 above it, so that the main shaft 9 can drive the base plate 10 to rotate. The ring mold 11 is bolted to the top of the base plate 10, and the diameter of the ring mold 11 is smaller than the diameter of the base plate 10.

[0033] The guide ring 12 is arranged on the upper edge of the ring die 11, and the guide ring 12 is inclined towards the middle of the ring die 11, which is equivalent to reducing the inner diameter of the ring die 11. The guide ring 12 is designed with a curved surface, and its inclination angle is mainly designed according to the Poisson's ratio of the raw material, the linear velocity of the die, and the gap between the die and the pressure roller 18. Under certain conditions of Poisson's ratio of the raw material and linear velocity of the die, the raw material sludge will automatically detach from the guide ring 12 during the climbing process. The detached sludge falls into the grasping area of ​​the pressure roller 18 and the ring die 11, which is conducive to sludge compression and can better suppress the sludge; at the same time, the design of the guide ring 12 also plays a role in preventing raw material from overflowing.

[0034] The support cavity 3 has a notch, and a downwardly inclined discharge plate 13 is provided at the notch, so that the sludge particles after being extruded and formed in the granulation chamber can flow out through the discharge plate 13.

[0035] In this embodiment, during installation, the mounting cavity 4 is bolted to the upper part of the support cavity 3. The mounting cavity 4 is an annular body with a double-layer structure. The mounting cavity 4 contains an installation chamber, and three pressure roller assemblies 18 are arranged circumferentially inside the mounting cavity 4.

[0036] To facilitate the installation of the pressure roller 18 assembly, three sets of mounting holes 14 are provided circumferentially inside the mounting cavity 4. Each set of mounting holes 14 includes two holes arranged vertically and vertically. The two mounting holes 14 are respectively arranged in the upper and lower layers of the mounting cavity 4, and the pressure roller 18 assembly is arranged in each set of mounting holes 14.

[0037] Each of the aforementioned pressure roller 18 assemblies includes an eccentric sleeve 15 that is fitted within the mounting cavity 4, an adjusting gear 16 that is keyed above the eccentric sleeve 15, a pressure roller shaft 17 that is fitted within the eccentric sleeve 15, and a pressure roller 18 that is bolted below the pressure roller shaft 17. Figure 6 As shown.

[0038] Specifically, the eccentric sleeve 15 is rotatably arranged between two corresponding mounting holes 14. The eccentric sleeve 15 is arranged vertically. In order to achieve the sealing of the mounting holes 14, a sealing ring 19 is provided between the eccentric sleeve 15 and the mounting cavity 4.

[0039] The eccentric sleeve 15 extends above the mounting cavity 4 and connects to the adjusting gear 16, which is located within the lubrication cavity 5. A boss-shaped retaining ring 20 is bolted to the lower part of the eccentric sleeve 15, and the retaining ring 20 is positioned outside the lower layer of the mounting cavity 4. Under the action of the adjusting gear 16 and the retaining ring 20, the eccentric sleeve 15 can be axially fixed, or it can be mounted on the mounting cavity 4, as shown below. Figure 5 As shown.

[0040] The eccentric sleeve 15 is not coaxial with the pressure roller shaft 17, so that when the eccentric sleeve 15 rotates, the movement trajectory of the pressure roller shaft 17 is an arc. In order to realize the rotation of the pressure roller shaft 17, self-aligning bearings 30 are provided at both the upper and lower ends of the pressure roller shaft 17, and the pressure roller shaft 17 is arranged between the two self-aligning bearings 30.

[0041] To fix the position of the self-aligning bearing 30, two round nuts 21 are threadedly connected to the upper part of the pressure roller shaft 17 to restrict the upper self-aligning bearing 30. The lower part of the pressure roller shaft 17 is stepped, and a limiting ring 22 is sleeved on the lower part of the pressure roller shaft 17. The lower part of the limiting ring 22 abuts against the shoulder of the pressure roller shaft 17, and the upper part of the limiting ring 22 extends into the retaining ring 20 and abuts against the lower self-aligning bearing 30, thereby limiting the position of the two self-aligning bearings 30.

[0042] An oil seal 23 is provided between the limiting ring 22 and the retaining ring 20. The oil seal 23 serves to seal and prevent the leakage of lubricating fluid.

[0043] To facilitate the installation of the pressure roller 18, the pressure roller shaft 17 extends downward and is placed inside the ring mold 11. A pressure roller cover 24 and the pressure roller 18 are fitted onto the shoulder of the pressure roller shaft 17. The pressure roller cover 24 and the pressure roller 18 are arranged vertically. The pressure roller cover 24 and the pressure roller 18 are bolted together and clamped to the shoulder of the pressure roller shaft 17 for fixation. Thus, when the pressure roller 18 rotates, the pressure roller shaft 17 rotates accordingly.

[0044] The pressure roller 18 adopts a suspended structure design, suspended at the lower end of the pressure roller shaft 17, which facilitates the lubrication of the bearings on the pressure roller shaft 17. The entire pressure roller 18 bearing lubrication requires no grease addition and allows for synchronous clearance adjustment. Furthermore, the pressure roller 18 is bolted in place, making replacement simple. Only the pressure roller 18 is placed inside the ring die 11; the rotating structure of the pressure roller shaft 17 and other components are external, reducing wear on critical components caused by sludge.

[0045] To prevent the excessive accumulation of sludge raw materials, a lifting frame 25 is installed below the mounting cavity 4. The lifting frame 25 is bolted to the bottom of the mounting cavity 4. There are three lifting frames 25, and these three lifting frames 25 and three pressure rollers 18 are arranged alternately in a circumferential manner within the ring die 11. Figure 7 As shown.

[0046] Specifically, each of the lifting frames 25 includes a U-shaped frame 251 and a triangular lifting plate 252, such as... Figure 8 As shown, the frame 251 has blades 26 on all four sides of the front side, the bottom of the frame 251 is close to the base plate 10, and the lifting plate 252 is provided on the bottom of the rear side of the frame 251. The lifting plate 252 is arranged at an upward angle. The sludge raw material can be thrown out by the lifting frame 25, so as to avoid it from adhering and accumulating on the base plate 10.

[0047] In this embodiment, the lubrication cavity 5 is a lubrication chamber. The lubrication cavity 5 includes an upper cover 51 and a circular cover plate 52. The upper cover 51 is an annular body. The upper cover 51 is welded above the mounting cavity 4, and the cover plate 52 is bolted to the upper cover 51.

[0048] The lubrication cavity 5 is equipped with a gap adjustment mechanism, which includes an internal gear ring 27 and a reducer 28 connected by a gear transmission. The internal gear ring 27 is arranged inside the upper cover 51, and the adjusting gears 16 of the three pressure rollers 18 assemblies mesh with the internal gear ring 27 respectively. Figure 4 As shown, the reducer 28 is provided on the cover plate 52, and the reducer 28 includes a motor and a worm gear reducer.

[0049] In order to enable the reducer 28 to drive the internal gear ring 27, the output shaft of the worm gear reducer extends into the upper cover 51 and is rotatably connected to the upper layer of the mounting cavity 4. A drive gear 29 is keyed to the output shaft of the worm gear reducer. The drive gear 29 meshes with the internal gear ring 27, thereby driving the internal gear ring 27 to rotate through the reducer 28.

[0050] The function of the gap adjustment mechanism is to automatically adjust the gap between the pressure roller 18 and the ring die 11. Its principle is that the reducer 28 meshes with the internal gear ring 27, and the rotation of the internal gear ring 27 drives the three eccentric sleeves 15 to rotate synchronously. This causes the pressure roller shaft 17 to generate an arc-shaped rotation trajectory, thereby synchronously adjusting the gap between the three pressure rollers 18 and the ring die 11. This ensures that the force is balanced during the operation of the equipment and ensures that the sludge raw material enters the extrusion zone, so that a gap is formed between the pressure roller 18 and the ring die 11. This gap is the material layer thickness.

[0051] The material layer thickness is a pre-treatment stage before the material enters the extrusion zone. At this time, the pressure roller 18 exerts a pre-compression force on the material in the layer. For forming ring dies 11 with different die hole diameters, a smaller gap is generally used to press small-diameter particles, and a larger gap is used to press large-diameter particles. Therefore, the gap adjustment mechanism promptly solves the problem of matching the gap with the raw material particle size. At the same time, it avoids the problem of small gap causing accelerated wear between ring die 11 and pressure roller 18 during equipment production, and large gap causing pressure roller 18 to slip, resulting in a decrease in granulation quality.

[0052] The lubrication chamber is a closed structure. Adding lubricating oil into the chamber allows for self-lubrication of the self-aligning bearing 30 on the pressure roller shaft 17 and the clearance adjustment mechanism, ensuring proper lubrication of the rotating parts of the equipment. Furthermore, the design of the lubrication chamber avoids the cumbersome step of unloading the corresponding parts before adding grease, making operation convenient, reducing the labor intensity of workers, and eliminating the need to stop the machine. Automatic lubrication during equipment operation reduces production and maintenance costs and effectively improves production efficiency.

[0053] In order to achieve uniform feeding of raw materials, a funnel-shaped feeding pipe 31 is provided on the lubrication cavity 5. The feeding pipe 31 is bolted to the middle of the cover plate 52. The upper end of the feeding pipe 31 is placed above the cover plate 52, and the lower end of the feeding pipe 31 extends downward and is placed in the middle of the ring die 11. That is, the lower end of the feeding pipe 31 passes through the lubrication cavity 5 and the mounting cavity 4 in sequence and extends into the middle of the ring die 11.

[0054] The upper end of the feed pipe 31 is a conical feed inlet with an angle of α, which is between 60° and 75°. This design takes advantage of the fact that the sludge raw material has an angle of accumulation of about 37°. The feed inlet is designed to prevent sticking to the wall and blockage. At the same time, the movement of the incoming material is guided by a trajectory, ensuring that the material falls in a funnel flow. The uniformity of material distribution within the ring die 11 is effectively guaranteed.

[0055] The lower end of the feeding pipe 31 is a circular discharge port, which is located in the center of the ring die 11. The discharge port is at a certain height from the bottom plate 10. It makes full use of the grabbing direction of the pressure roller 18 and the design structure of the inlet ramp of the lifting frame 25 to perform secondary uniform diversion of the falling raw material.

[0056] When the granulator is running, the main motor 6 drives the main shaft 9 to rotate at high speed through the reduction gearbox 8, which in turn drives the ring die 11 to rotate at high speed through the bottom plate 10. The sludge raw material falls into the middle of the ring die 11 through the upper end of the feeding pipe 31 and is evenly distributed. Under the squeezing action of the pressure roller 18 and the ring die 11, the material is strongly squeezed by the pressure roller 18 and squeezed out from the die hole of the ring die 11 to form granular sludge. The formed sludge granules flow out through the discharge plate 13, completing the sludge granulation.

[0057] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present invention should be included within the scope of the present invention.

Claims

1. A suspended sludge granulator, comprising a base (1), a drive mechanism, a housing (2), and a support cavity (3), a mounting cavity (4), and a lubrication cavity (5) sequentially arranged above the housing (2), characterized in that, A bottom plate (10) connected to a driving mechanism, a ring die (11) coaxially arranged on the bottom plate (10), and a guide ring (12) inclinedly arranged above the ring die (11) are provided in the support cavity (3); A notch is formed on the support cavity (3), and a discharge plate (13) inclined downward is arranged at the notch; The installation cavity (4) is of a double-layer structure. Three pressing roller (18) assemblies are circumferentially and evenly arranged inside the installation cavity (4). Each pressing roller (18) assembly includes an eccentric sleeve (15)转接在安装腔体(4)内的偏心套(15)、键连接在偏心套(15)上方的调整齿轮(16)、转接在偏心套(15)内的压辊轴(17)和螺栓连接在压辊轴(17)下方的压辊(18);transferred inside the installation cavity (4), an adjusting gear (16) key-connected above the eccentric sleeve (15), a pressing roller shaft (17) transferred inside the eccentric sleeve (15), and a pressing roller (18) bolted below the pressing roller shaft (17); The adjusting gear (16) is placed inside the lubrication cavity (5). The eccentric sleeve (15) and the pressing roller shaft (17) are not coaxial. A material-lifting frame (25) is arranged below the installation cavity (4). The material-lifting frame (25) and the pressing rollers (18) are circumferentially and alternately arranged inside the ring die (11); The material-lifting frame (25) is bolted below the installation cavity (4). The number of the material-lifting frames (25) is three. Each material-lifting frame (25) includes a "mouth"-shaped frame (251) and a triangular plate-shaped material-lifting plate (252). Blades (26) are arranged around the front side of the frame (251). The material-lifting plate (252) is arranged at the bottom of the rear side of the frame (251), and the material-lifting plate (252) is inclined upward; A gap adjusting mechanism is arranged on the lubrication cavity (5). The gap adjusting mechanism includes an internal gear ring (27) and a reduction gear (28) connected by gear transmission. The adjusting gears (16) of the three pressing roller (18) assemblies are respectively meshed with the internal gear ring (27); The upper part of the eccentric sleeve (15) extends out of the upper layer of the installation cavity (4) to connect the adjusting gear (16). A boss-shaped clamping ring (20) is bolted below the eccentric sleeve (15). The clamping ring (20) is arranged outside the lower layer of the installation cavity (4). A sealing ring (19) is arranged between the eccentric sleeve (15) and the installation cavity (4); Aligning bearings (30) are arranged at both the upper and lower ends inside the pressing roller shaft (17). The pressing roller shaft (17) is arranged between the two aligning bearings (30). A round nut (21) is threadedly connected above the pressing roller shaft (17) to limit the upper aligning bearing (30). The lower part of the pressing roller shaft (17) is of a stepped shaft shape. A limiting ring (22) is sleeved below the pressing roller shaft (17). The limiting ring (22) extends into the clamping ring (20) and abuts against the lower aligning bearing (30). An oil seal (23) is arranged between the limiting ring (22) and the clamping ring (20); The lower part of the pressing roller shaft (17) extends downward and is placed inside the ring die (11). A pressing roller cover (24) and a pressing roller (18) are sleeved at the shoulder of the lower part of the pressing roller shaft (17). The pressing roller cover (24) and the pressing roller (18) are arranged vertically. The pressing roller cover (24) and the pressing roller (18) are bolted to clamp the shoulder of the pressing roller shaft (17) for fixation; The lubrication cavity (5) is provided with a funnel-shaped feeding pipe (31), the lower end of which extends downward and is placed in the middle of the ring die (11).

2. The suspended sludge granulator according to claim 1, characterized in that, The drive mechanism is provided on the base (1). The drive mechanism includes a main motor (6) and a mounting base (7) on both sides of the base (1), a gearbox (8) in the mounting base (7) and a main shaft (9) connected to the gearbox (8). A coupling is provided between the main motor (6) and the gearbox (8) for connection. The main shaft (9) is arranged vertically.

3. A suspended sludge granulator according to claim 2, characterized in that, The housing (2) is arranged above the mounting base (7). The main shaft (9) extends out of the mounting base (7) and is placed inside the housing (2). The main shaft (9) is rotatably connected to the housing (2). The main shaft (9) is keyed to the middle of the base plate (10).

4. A suspended sludge granulator according to claim 1, characterized in that, The supporting cavity (3) is bolted to the top of the box (2). The supporting cavity (3) is an annular body. The bottom plate (10) is rotatably arranged inside the supporting cavity (3). The ring mold (11) is bolted to the top of the bottom plate (10). The diameter of the ring mold (11) is smaller than the diameter of the bottom plate (10). The guide ring (12) is arranged on the upper edge of the ring mold (11). The guide ring (12) is inclined towards the middle of the ring mold (11) to reduce the inner diameter of the ring mold (11).

5. A suspended sludge granulator according to claim 1, characterized in that, The mounting cavity (4) is bolted to the support cavity (3). The mounting cavity (4) is an annular body. Three sets of mounting holes (14) are circumferentially opened inside the mounting cavity (4). The pressure roller (18) assembly is arranged in each set of mounting holes (14).

6. A suspended sludge granulator according to claim 1, characterized in that, The lubrication cavity (5) includes an upper cover (51) and a circular cover plate (52). The upper cover (51) is an annular body and is welded above the mounting cavity (4). The internal gear ring (27) is arranged inside the upper cover (51), and the cover plate (52) is bolted to the upper cover (51). The reducer (28) is provided on the cover plate (52). The reducer (28) includes a motor and a worm gear reducer. The output shaft of the worm gear reducer extends into the upper cover (51) and is rotatably connected to the upper layer of the mounting cavity (4). A drive gear (29) is keyed to the output shaft of the worm gear reducer. The drive gear (29) meshes with the internal gear ring (27).

7. A suspended sludge granulator according to claim 6, characterized in that, The feed tube (31) is bolted to the middle of the cover plate (52). The upper end of the feed tube (31) is placed above the cover plate (52). The lower end of the feed tube (31) passes through the lubrication cavity (5) and the mounting cavity (4) in sequence and extends into the middle of the ring die (11).

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