A urea prilling device
By designing the rotating mechanism and receiving assembly of the urea granulation device, the problem of material breakage and powdering caused by collision during the drying process was solved, thereby improving material quality and reducing cleaning difficulty.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SHANXI FENGXI HUARUI COAL CHEM IND
- Filing Date
- 2026-07-02
- Publication Date
- 2026-07-31
AI Technical Summary
During the drying process, materials are prone to breakage or powdering due to collisions, affecting the shape and quality of the materials and increasing the difficulty of cleaning.
A urea granulation device was designed, including a shell, a feeding mechanism, a drying mechanism, and a rotating mechanism. The rotating mechanism drives the receiving component and the conveying component to reduce the impact force of the falling material. The auger blades and conveyor belt are used to reduce the breakage and powder generation caused by collision.
It effectively reduces the impact force when materials fall, reduces the generation of fragments and powder, improves the production quality of materials, and reduces the difficulty of cleaning.
Smart Images
Figure CN122486352A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of urea drying technology, and more specifically to a urea granulation apparatus. Background Technology
[0002] Urea, also known as urea or carbamide, is a white crystalline solid, tasteless and odorless, readily soluble in water, ethanol, and benzene, and slightly soluble in ether and chloroform. Urea is one of the simplest organic compounds and a major nitrogenous end product of protein metabolism in mammals and some fish. It can be used as a fertilizer, animal feed, explosives, glue stabilizer, and chemical raw material. It is named urea because it is found in human urine. As a neutral fertilizer, urea is suitable for various soils and plants. It is easy to store, convenient to use, and has minimal impact on soil, making it a widely used chemical nitrogen fertilizer. Urea contains 46% nitrogen (N), the highest nitrogen content among solid nitrogen fertilizers. Industrially, urea is synthesized from ammonia and carbon dioxide under specific conditions. Urea granules require moisture removal, necessitating the use of drying equipment.
[0003] Chinese patent document CN219160919U discloses a disc-type continuous dryer. This disc-type continuous dryer, through the cooperation of a fixed rod, a clamping part and a fixed structure, can replace all the rake blades on the rake arm without turning the bolts, thus improving the replacement efficiency of the rake blades.
[0004] During the drying process, the material falls from one drying tray to the next under the push of the rake blades. However, there is a large height difference between the two drying trays. The dried material itself has a relatively loose structure. When the material falls to the last drying tray, the collision between the dried material and the drying tray can easily cause the material to break, deform, or fall off as powder. This not only affects the shape or quality of the material, but also increases the difficulty of cleaning the drying device.
[0005] Therefore, a urea granulation device is proposed to solve the problems mentioned above. Summary of the Invention
[0006] This invention provides a urea granulation device, which aims to solve the problem in related technologies that materials are prone to breakage or powder falling off due to collisions during the drying process.
[0007] The urea granulation device of the present invention includes a shell, a feeding mechanism installed on the shell, and a drying mechanism disposed in the shell. A rotating mechanism for pushing material to fall is rotatably connected to the drying mechanism. A plurality of receiving mechanisms distributed on the outside of the drying mechanism are installed on the rotating mechanism to reduce the impact force of the falling material.
[0008] The receiving mechanism includes a receiving component, a feeding component, and a conveying component. The receiving component is mounted on the rotating mechanism to receive the material falling from the edge of the drying mechanism. The conveying component is located inside the receiving component on one side to transfer the falling material. The feeding component is located inside the receiving component at the bottom. The conveying assembly includes a rotating roller 1 and a rotating roller 2 rotatably connected inside the receiving assembly, and a conveyor belt disposed on the rotating roller 1 and the rotating roller 2. The rotating roller 1 and the rotating roller 2 can drive the material on the conveyor belt to move downward. The feeding assembly includes a mounting cover installed in the receiving assembly, a connecting rod rotatably connected to the mounting cover, and auger blades installed on the connecting rod. The auger blades drive the material falling from the conveyor belt downward to reduce the impact force when the material falls.
[0009] During the drying process, the rotating mechanism drives the material to move downwards layer by layer. As the rotating mechanism rotates, it also drives the receiving assembly to rotate, allowing it to catch the material about to fall to the bottom from the edge of the drying unit, thus reducing the material's falling height. When the material enters the receiving assembly, the conveyor belt first contacts the material, and then the rotation of rollers one and two moves the material on the conveyor belt, accelerating its downward movement and preventing it from accumulating on the conveyor belt. Simultaneously, the connecting rod drives the auger blades to rotate, which in turn moves the material transferred down the conveyor belt downwards, reducing the impact force during the fall and minimizing the risk of the material breaking or falling powder due to collision, thereby improving the production quality of the material.
[0010] Preferably, the receiving assembly includes a mounting frame mounted on a rotating mechanism and a receiving hopper mounted on the bottom side of the mounting frame. A discharge pipe is installed at the bottom end of the receiving hopper, and the auger blades are located inside the discharge pipe.
[0011] When the auger blades rotate, the material can move down along the path of the discharge pipe, thereby transferring the material in the mounting frame from a high position to a low position and discharging it.
[0012] Preferably, a partition is installed on the inner wall of the mounting frame, the conveyor belt is located on one side of the partition, and a transmission assembly is provided on the other side of the partition. The transmission assembly is rotatably connected to the mounting frame.
[0013] Preferably, guide grooves for sliding of the second rotating roller are provided on both sides of the mounting frame, and sliding grooves are provided on both sides of the mounting frame near the guide grooves. Slide plates are rotatably connected to both ends of the second rotating roller, and protrusions that slide in the sliding grooves are installed on the slide plates. A pulley is rotatably connected to one side of the mounting frame near the sliding groove, and an adjustment component is provided on the side of the mounting frame near the pulley.
[0014] By using a combination of slide plates and guide troughs, the tilt angle of the conveyor belt can be adjusted, reducing the height from which some materials fall onto the conveyor belt and the height from which materials fall from the conveyor belt into the receiving hopper.
[0015] Preferably, the transmission assembly includes a rotating rod, a bevel gear, a bevel gear, a spur gear, and a bevel gear. The rotating rod is rotatably connected to the inner wall of the mounting frame. One end of the rotating rod passes through the mounting frame and is connected to the rotating roller. The bevel gear is mounted on the rotating rod. The bevel gear and the bevel gear are meshed and connected to the top and bottom of one side of the bevel gear, respectively. The spur gear is mounted on the bevel gear. The rotating rod is mounted on the bevel gear. One end of the rotating rod passes through the mounting frame and is connected to the connecting rod.
[0016] Preferably, the drying mechanism is provided with a toothed ring that meshes with a spur gear to drive the spur gear to rotate.
[0017] When the mounting frame moves, the spur gear can drive the bevel gear two to rotate under the action of the gear ring. At the same time, the bevel gear two can drive the conveyor belt to run through the rotating rod one on the bevel gear one. The bevel gear three can drive the auger blade to rotate through the rotating rod three.
[0018] Preferably, the adjustment assembly includes a turntable mounted on a rotating rod, a hinge hinged to the turntable, a slider hinged to the hinge, and a pull rope connected to the slider. A slide rail mounted on a mounting frame is slidably connected to the slider, and one end of the pull rope passes around a pulley and is mounted on a sliding plate.
[0019] By using the combination of the rotating rod, turntable, hinge, and slider, the pull rope can be moved, which in turn moves the slide plate along the guide groove, causing the conveyor belt to oscillate. This reduces the height from which some material falls onto the conveyor belt and into the receiving hopper, further reducing the material breakage rate.
[0020] Preferably, the rotating mechanism includes a rotating shaft and multiple sets of pushing assemblies mounted on the rotating shaft. The pushing assemblies are used to push the material to move. A motor mounted on the top of the housing is connected to the top of the rotating shaft.
[0021] Preferably, the feeding assembly includes multiple rakes and multiple rake blades installed at equal intervals on the rakes, with the rake blades on each pair of adjacent rakes being staggered.
[0022] Preferably, multiple mounting brackets are installed on the outer side of the rotating shaft, and the material receiving mechanism is mounted on the mounting brackets.
[0023] By adopting the above technical solution, the beneficial effects of the present invention are as follows: During the drying process, the rotating mechanism drives the receiving component to rotate, so that the receiving component receives the material falling from the edge of the drying mechanism. Then, through the rotation of the conveyor belt, the material can be moved downward faster. At the same time, through the rotation of the auger blades, the material transferred from the conveyor belt can be transferred downward, thereby reducing the impact force when the material falls and reducing the risk of the material breaking or falling powder due to collision, thereby improving the production quality of the material and reducing the difficulty of cleaning. Attached Figure Description
[0024] Figure 1 This is a schematic diagram of the overall structure of a specific embodiment of the present invention.
[0025] Figure 2 This is a schematic diagram of the internal structure of the housing in a specific embodiment of the present invention.
[0026] Figure 3 This is a schematic diagram of the drying mechanism in a specific embodiment of the present invention.
[0027] Figure 4 This is a schematic diagram of the material receiving mechanism in a specific embodiment of the present invention.
[0028] Figure 5 This is a schematic diagram of the mounting frame in a specific embodiment of the present invention.
[0029] Figure 6 This is a schematic diagram of the internal structure of the receiving hopper in a specific embodiment of the present invention.
[0030] Figure 7 This is a schematic diagram of the internal structure of the mounting frame in a specific embodiment of the present invention.
[0031] Figure label: 10. Protective mechanism; 11. Housing; 12. Motor; 20. Feeding mechanism; 30. Drying mechanism; 31. Drying tray one; 32. Drying tray two; 33. Drying tray three; 34. Drying tray four; 35. Discharge pipe; 36. Support frame; 40. Rotating mechanism; 41. Rotating shaft; 42. Rake bar; 43. Rake blades; 44. Mounting frame; 50. Receiving mechanism; 51. Receiving assembly; 511. Mounting frame; 512. Receiving hopper; 513. Discharge pipe; 514. Partition plate; 515. Guide groove; 516. Slide groove; 517. Pulley; 52. Transmission assembly; 521. Rotating rod one; 522. Transmission wheel one; 523. Bevel gear one; 524. Bevel gear two; 525. Rotating rod two; 526. Circular gear; 527. Bevel gear three; 528. Rotating rod three; 53. Adjustment group Components; 531, turntable; 532, hinge; 533, slider; 534, slide rail; 535, pull rope; 54, feeding assembly; 541, mounting cover; 542, connecting rod; 543, drive wheel two; 544, auger blade; 545, drive wheel three; 55, conveying assembly; 551, rotating roller one; 552, drive wheel four; 553, rotating roller two; 554, conveyor belt; 555, slide plate; 556, protrusion; 56, toothed ring. Detailed Implementation
[0032] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.
[0033] like Figures 1 to 7 As shown, the urea granulation apparatus of the present invention includes a protective mechanism 10, a feeding mechanism 20, a drying mechanism 30, a rotating mechanism 40, and a receiving mechanism 50. The feeding mechanism 20 is installed on one side of the top of the protective mechanism 10 and is used to feed material into the protective mechanism 10. The drying mechanism 30 is installed inside the protective mechanism 10 and is used to dry the material. The rotating mechanism 40 is rotatably connected to the drying mechanism 30 to push the material to move. Multiple receiving mechanisms 50 are arranged in a circular array around the axis of the protective mechanism 10 on the outside of the drying mechanism 30, and are used to transfer material.
[0034] During the drying process, the material to be dried is conveyed to the drying mechanism 30 via the feeding mechanism 20. At this time, the rotating mechanism 40 pushes the material to move on the drying mechanism 30, causing the material to fall layer by layer for drying. When the material is about to fall to the bottom, this part of the material first falls into the receiving mechanism 50. The receiving mechanism 50 reduces the impact force of the material when it falls and conveys the material to the bottom of the drying mechanism 30, thereby avoiding collisions due to the height of the material when it falls, and preventing the material from breaking and falling powder.
[0035] like Figures 1 to 2As shown, the protective mechanism 10 includes a housing 11, a motor 12 is mounted on the top of the housing 11, and a feeding mechanism 20 is mounted on one side of the top of the housing 11. An exhaust port is provided on one side of the top of the housing 11. In this embodiment, the feeding mechanism 20 is a screw feeder, and the discharge port of the feeding mechanism 20 is connected to the interior of the housing 11 to transport the material to the drying mechanism 30.
[0036] like Figures 2 to 4 As shown, the drying mechanism 30 includes a first drying tray 31, a second drying tray 32, a third drying tray 33, and a fourth drying tray 34. There are two first drying trays 31 and two second drying trays 32, arranged alternately from top to bottom. The diameter of the second drying tray 32 is larger than that of the first drying tray 31 to receive material falling from the first drying tray 31. A through hole is provided on the inner side of the second drying tray 32 to discharge material from it. The third drying tray 33 is located below the second second drying tray 32, and there is a gap between them to receive material falling from the second second drying tray 32. The fourth drying tray 34 is located below the third drying tray 33. The first drying tray 31, the second drying tray 32, the third drying tray 33, and the fourth drying tray 34 are all located on the same axis. Both drying tray 2 (32) and drying tray 4 (34) are equipped with annular baffles on their outer sides to prevent material from falling out of drying tray 2 (32). Drying tray 4 (34) has the same structure as drying tray 2 (32). A discharge pipe 35 is installed at the bottom of drying tray 4 (34). The bottom end of the discharge pipe 35 passes through the shell 11 and extends to the outside of the shell 11 to discharge the dried material.
[0037] Continue to refer to Figures 2 to 4 As shown, multiple support frames 36 are installed on the inner bottom wall of the shell 11. These support frames 36 are arranged in a circular array around the axis of the second drying tray 32. Each support frame 36 has an internal channel for the passage of heating gas. The outer sides of the first drying tray 31, the second drying tray 32, the third drying tray 33, and the fourth drying tray 34 are all fixed to and connected to the support frames 36 to transfer heat to their outer surfaces, thereby drying the material.
[0038] Continue to refer to Figures 2 to 4 As shown, the rotating mechanism 40 includes a rotating shaft 41 and multiple sets of pushing assemblies mounted on the rotating shaft 41. The multiple pushing assemblies are respectively disposed on the upper surfaces of two drying trays 31, two drying trays 32, three drying trays 33, and four drying trays 34. The rotating shaft 41 is rotatably connected to the inner side of the drying tray 31 and extends downwards to the inner side of the drying tray 34. The top of the rotating shaft 41 is mounted on the output shaft of the motor 12. The motor 12 can drive the rotating shaft 41 to rotate, thereby driving the pushing assemblies to rotate synchronously, and thus pushing the material from top to bottom.
[0039] Continue to refer to Figures 2 to 4 As shown, the feeding assembly includes multiple rakes 42 and multiple rake blades 43 disposed on the rakes 42. The multiple rakes 42 are arranged in a circular array on the rotating shaft 41. The multiple rake blades 43 are evenly spaced along the length of the rakes 42, and the rake blades 43 on each adjacent pair of rakes 42 are staggered. The rake blades 43 on drying tray 1 31 and drying tray 33 face the same direction, the rake blades 43 on drying tray 2 32 and drying tray 4 34 face the same direction, and the rake blades 43 on drying tray 1 31 and drying tray 2 32 face opposite directions.
[0040] The rake blades 43 are positioned at different heights and angles. When the rotating shaft 41 starts to rotate, the rake blades 43 move in a circular motion. Driven by the rake blades 43, the materials on drying trays 31 and 33 move slowly towards the edge of the drying trays along the pushing direction of the rake blades 43. At the same time, the rake blades 43 can also exert force on the materials on drying trays 32 and 34, pushing these materials towards the inside of the drying trays, thus transferring the materials from top to bottom. After the materials fall from the upper layer, the rotating rake blades 43 can disperse the materials that were originally gathered together, allowing the materials to fully contact the drying environment, thereby achieving a more comprehensive and uniform drying process.
[0041] Continue to refer to Figures 2 to 4 As shown, multiple mounting brackets 44 are installed on the outer side of the rotating shaft 41, and multiple receiving mechanisms 50 are respectively installed on the multiple mounting brackets 44. The receiving mechanisms 50 are located at the bottom end of the drying tray 33. The receiving mechanisms 50 rotate synchronously with the rake blades 43 that can push the material out of the drying tray 33 to receive the material in a timely manner. In other embodiments, a receiving mechanism 50 can be added to the bottom end of the drying tray 31 to accommodate materials with different moisture contents.
[0042] like Figures 2 to 5 As shown, the receiving mechanism 50 includes a receiving component 51, a transmission component 52, an adjusting component 53, a feeding component 54, and a conveying component 55. The receiving component 51 is located at the bottom of the drying tray 33 and mounted on the mounting frame 44. The transmission component 52 is located inside one side of the receiving component 51, and the conveying component 55 is located inside the other side of the receiving component 51 and is connected to the transmission component 52 to reduce the impact force when the material falls. The adjusting component 53 is located on one side of the receiving component 51 to adjust the tilt angle of the conveying component 55, and the feeding component 54 is located below the conveying component 55 to convey the material onto the drying tray 34.
[0043] like Figures 4 to 5As shown, the receiving assembly 51 includes a mounting frame 511 mounted on the mounting bracket 44 and a receiving hopper 512 mounted on one side of the bottom of the mounting frame 511. A discharge pipe 513 is installed at the bottom end of the receiving hopper 512. A partition 514 is installed on the inner wall of the mounting frame 511. The transmission assembly 52 is located on one side of the partition 514, and the conveying assembly 55 is located on the other side of the partition 514.
[0044] like Figure 5 As shown, guide grooves 515 are provided on both sides of the mounting frame 511, and sliding grooves 516 are provided on both sides of the mounting frame 511 near the guide grooves 515. Both guide grooves 515 and sliding grooves 516 are arc-shaped and are located at the same center. A pulley 517 is rotatably connected to one side of the mounting frame 511 near the sliding groove 516.
[0045] like Figures 4 to 6 As shown, the transmission assembly 52 includes a rotating rod 521, a bevel gear 523, a bevel gear 524, a spur gear 526, and a bevel gear 527. The rotating rod 521 is rotatably connected to the inner wall of the mounting frame 511. A transmission wheel 522 is mounted on one end of the rotating rod 521 that passes through the mounting frame 511, and the transmission wheel 522 is connected to the conveying assembly 55. The bevel gear 523 is mounted on the outside of the rotating rod 521, and the bevel gear 524 is meshed with the top of one side of the bevel gear 523. A rotating rod 525 is mounted on the top of the bevel gear 524.
[0046] A spur gear 526 is mounted on the top of the rotating rod 525, and a gear ring 56 is mounted on the bottom of the drying tray 33, meshing with the spur gear 526. A support plate is rotatably connected to the outer side of the rotating rod 525, and the support plate is mounted on the inner wall of the mounting frame 511. A bevel gear 527 is meshed with the bottom side of the bevel gear 523, and a rotating rod 528 is mounted on the bottom of the bevel gear 527. The bottom end of the rotating rod 528 passes through the bottom of the mounting frame 511 and extends to the outside of the mounting frame 511. The rotating rod 528 is rotatably connected to the mounting frame 511 and is also connected to the feeding assembly 54.
[0047] During the drying process, the rotating shaft 41 can drive the mounting frame 511 to rotate through the mounting bracket 44. When the mounting frame 511 rotates, it can receive the material falling from the drying tray 33 and prevent the material from falling directly. At the same time, the mounting frame 511 also drives the circular gear 526 to revolve.
[0048] During its revolution, the spur gear 526 also rotates on its own axis under the action of the gear ring 56. This rotation drives the connected rotating rod 525 to rotate as well. The rotating rod 525 then drives the bevel gear 524 to rotate, which in turn drives the transmission wheel 522 on the rotating rod 521 to rotate via the bevel gear 523. The transmission wheel 522 then drives the conveying assembly 55 to transport materials.
[0049] At the same time, bevel gear 1 523 drives the rotating rod 3 528 to rotate through bevel gear 3 527. The rotating rod 3 528 drives the feeding assembly 54 to run. During operation, the feeding assembly 54 can transport the material received in the mounting frame 511 to the upper surface of the drying tray 4 34.
[0050] In traditional urea drying equipment, the material falls directly from drying tray 33 to drying tray 34. Due to the significant drop height, the material experiences considerable impact during this descent. This impact easily leads to particle breakage, affecting the quality and grade of the material. However, by using the mounting frame 511 to receive the material and the feeding assembly 54 to convey it to the upper surface of drying tray 34, the direct drop height of the material from drying tray 33 to drying tray 34 is greatly reduced. This significantly reduces the impact force experienced by the material during its descent, effectively lowering the breakage rate and improving the overall quality of the dried urea.
[0051] like Figures 5 to 6 As shown, the conveying assembly 55 includes a first roller 551, a second roller 553, and a conveyor belt 554. The first roller 551 is rotatably connected to one side of the inner wall of the mounting frame 511. Both ends of the second roller 553 pass through the mounting frame 511 and slide in the guide groove 515. The conveyor belt 554 is disposed on the outside of the first roller 551 and the second roller 553, and an elastic rubber layer is provided on the outer surface of the conveyor belt 554.
[0052] The elastic rubber layer is soft and has good cushioning properties. When materials fall from a height, the elastic rubber layer on the outer surface of the conveyor belt 554 can effectively disperse and absorb the strong impact force generated when the materials fall, thereby reducing the occurrence of breakage and splashing during the fall, ensuring the integrity of the materials and the stability of the conveying process. The rotation of roller 551 and roller 553 can drive the conveyor belt 554 to rotate, accelerating the downward movement of materials and preventing materials from accumulating on the conveyor belt 554.
[0053] Continue to refer to Figures 5 to 6As shown, one end of the rotating roller 551 passes through the mounting frame 511 and extends to the outside of the mounting frame 511. A transmission wheel 552 is mounted on one end of the rotating roller 551. The diameter of the transmission wheel 552 is smaller than the diameter of the transmission wheel 522. In this embodiment, both the transmission wheel 522 and the transmission wheel 552 are pulleys, and they are connected by a belt drive. In other embodiments, both the transmission wheel 522 and the transmission wheel 552 are sprockets, and they are connected by a chain drive.
[0054] Continue to refer to Figures 5 to 6 As shown, both ends of the roller 553 are rotatably connected to a slide plate 555 via bearings. Two protrusions 556 are slidably connected in the groove 516 on one side of the slide plate 555.
[0055] like Figures 4 to 7 As shown, the adjustment assembly 53 includes a turntable 531, a hinge 532, a slider 533, and a pull rope 535. The turntable 531 is rotatably connected to one end of the drive wheel 522. One end of the hinge 532 is hinged to one edge of the turntable 531 via a hinge rod, and the other end of the hinge 532 is hinged to one side of the slider 533 via a pin. A slide rail 534 is slidably connected to the other side of the slider 533. The slide rail 534 is mounted on one side of the mounting frame 511. One end of the pull rope 535 is fixed to the top of the slider 533, and the other end of the pull rope 535 passes around the pulley 517 and is mounted on the top of the slide plate 555.
[0056] When the drive wheel 522 starts to rotate, the turntable 531 drives the slider 533 to reciprocate through the hinge 532. During the movement, the slider 533 can drive the slide plate 555 to reciprocate along the track of the guide groove 515 through the pull rope 535.
[0057] As slider 533 reciprocates along a predetermined trajectory, it also drives roller 2 553 to move synchronously. During its movement, roller 2 553 is connected to one end of conveyor belt 554, so it can drive one end of conveyor belt 554 to reciprocate around roller 1 551, thereby causing conveyor belt 554 to oscillate around roller 1 551.
[0058] The oscillation of the conveyor belt 554 reduces the height from which the material falls, thus decreasing the impact force and reducing breakage when the material hits the conveyor belt 554. Similarly, when the material falls from the conveyor belt 554 into the receiving hopper 512, the oscillation of the conveyor belt 554 also reduces the height from which the material falls, further reducing the breakage rate.
[0059] like Figures 4 to 6As shown, the feeding assembly 54 includes a mounting cover 541, a connecting rod 542, and an auger blade 544. The mounting cover 541 is installed in the receiving hopper 512. The top of the mounting cover 541 is arc-shaped and the interior is hollow, facilitating the sliding of materials off the mounting cover 541. One end of the mounting cover 541 penetrates through the receiving hopper 512 and extends to the outside of the receiving hopper 512. The end of the mounting cover 541 penetrating through the receiving hopper 512 has an opening. The connecting rod 542 is located inside the discharge pipe 513. The auger blade 544 is installed on the outside of the connecting rod 542, and the outside of the auger blade 544 contacts the inner wall of the discharge pipe 513, preventing materials from entering the gap between the auger blade 544 and the discharge pipe 513, and preventing the materials from being crushed.
[0060] like Figure 6 As shown, the top end of the connecting rod 542 penetrates the bottom of the mounting cover 541 and extends into the interior of the mounting cover 541. The connecting rod 542 is rotatably connected to the mounting cover 541. A second transmission wheel 543 is mounted on the top end of the connecting rod 542, and a third transmission wheel 545 is mounted on the bottom end of the rotating rod 528. Both the second transmission wheel 543 and the third transmission wheel 545 are belt pulleys. The diameter of the second transmission wheel 543 is smaller than the diameter of the third transmission wheel 545, and the second transmission wheel 543 and the third transmission wheel 545 are connected by a belt drive.
[0061] When the rotating rod 528 rotates, the transmission wheel 545 drives the transmission wheel 543 to rotate via a belt. The transmission wheel 543 then drives the auger blades 544 to rotate via the connecting rod 542. At this time, the auger blades 544 cause the material in the receiving hopper 512 to gradually move downwards along the spiral trajectory of the auger blades 544. As the material continues to move downwards, it will eventually reach the bottom of the discharge pipe 513. In this way, the height difference of the material falling into the drying tray 34 is effectively reduced.
[0062] Meanwhile, as the auger blades 544 continue to rotate, when the material reaches the end of the auger blades 544, the rotational motion of the auger blades 544 has a certain centrifugal force, and its spiral structure can disperse the material. Therefore, the material can be evenly sprinkled onto the surface of the drying tray 34, allowing the material to come into more full contact with the drying medium, greatly improving the drying efficiency of the material and ensuring that the urea is dried more thoroughly.
[0063] Working Principle: During the drying process, the material is conveyed into the interior of the shell 11 through the feeding mechanism 20. After entering the shell 11, the material naturally falls onto the upper surface of the top drying tray 31 under the action of gravity. When the material falls onto the drying tray 31, the motor 12 drives the rotating shaft 41 to rotate. The rotating shaft 41 drives the rake blades 43 to rotate synchronously through the rake rod 42. When the rake blades 43 rotate, they apply a force towards the edge to the material on the drying trays 31 and 33, causing the material to move towards the edge of the drying tray. For the material on the drying trays 32 and 34, the rake blades 43 push them inward, thus pushing the material to fall layer by layer.
[0064] During continuous rotation, the rotating shaft 41 is connected to the mounting frame 511 via the mounting bracket 44, thereby causing the mounting frame 511 to rotate synchronously. When the material falls from the drying tray 33 under the push of the rake blades 43, the mounting frame 511 can receive the material falling from the drying tray 33. At the same time, the gear ring 56 drives the meshing spur gear 526 to rotate, and the spur gear 526 in turn drives the bevel gear 524 to rotate via the rotating rod 525. During the rotation, the bevel gear 524 cooperates with the bevel gear 523, and the bevel gear 523 drives the transmission wheel 522 on the rotating rod 521 to rotate, so that the transmission wheel 522 drives the conveyor belt 554 to run, so that the material falls from the drying tray 33 and is driven by the conveyor belt 554 into the receiving hopper 512. Furthermore, when bevel gear 523 rotates, it also drives bevel gear 527 to rotate rod 528, which in turn drives the auger blades 544 connected to it. As the auger blades 544 rotate, they transfer the material in the receiving hopper 512 downwards and evenly distribute it onto the drying tray 34. This reduces the impact force of the material falling onto the drying tray 34, minimizing the risk of breakage or powder falling due to collisions and thus improving the quality of the material. Simultaneously, the reduced breakage and powder generation also lowers the difficulty of subsequent cleaning.
[0065] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.
Claims
1. A urea granulation device, comprising a housing (11) and a feeding mechanism (20) mounted on the housing (11) and a drying mechanism (30) arranged in the housing (11), a rotating mechanism (40) for pushing material falling is rotatably connected on the drying mechanism (30), characterized in that, Multiple receiving mechanisms (50) distributed on the outside of the drying mechanism (30) are installed on the rotating mechanism (40) to reduce the impact force of the falling material; The receiving mechanism (50) includes a receiving component (51), a feeding component (54), and a conveying component (55). The receiving component (51) is mounted on the rotating mechanism (40) to receive the material falling from the edge of the drying mechanism (30). The conveying component (55) is located on one side inside the receiving component (51) to transfer the falling material. The feeding component (54) is located inside the lower part of the receiving component (51). The conveying assembly (55) includes a first rotating roller (551) and a second rotating roller (553) rotatably connected inside the receiving assembly (51) and a conveyor belt (554) disposed on the first rotating roller (551) and the second rotating roller (553). The first rotating roller (551) and the second rotating roller (553) can drive the material on the conveyor belt (554) to move downward. The feeding assembly (54) includes a mounting cover (541) installed in the receiving assembly (51) and a connecting rod (542) rotatably connected to the mounting cover (541) and an auger blade (544) installed on the connecting rod (542). The auger blade (544) drives the material falling from the conveyor belt (554) downward to reduce the impact force when the material falls.
2. The urea prilling apparatus of claim 1, wherein The receiving assembly (51) includes a mounting frame (511) mounted on a rotating mechanism (40) and a receiving hopper (512) mounted on one side of the bottom of the mounting frame (511). A discharge pipe (513) is installed at the bottom of the receiving hopper (512), and the auger blade (544) is located inside the discharge pipe (513).
3. The urea prilling apparatus of claim 2, wherein, A partition (514) is installed on the inner wall of the mounting frame (511). The conveyor belt (554) is located on one side of the partition (514). A transmission assembly (52) is provided on the other side of the partition (514). The transmission assembly (52) is rotatably connected to the mounting frame (511).
4. The urea granulation apparatus according to claim 3, characterized in that, The mounting frame (511) has guide grooves (515) on both sides for the sliding of the second rotating roller (553). The mounting frame (511) has sliding grooves (516) on both sides near the guide grooves (515). The two ends of the second rotating roller (553) are rotatably connected to the sliding plate (555). The sliding plate (555) has a protrusion (556) that slides in the sliding groove (516). The mounting frame (511) has a pulley (517) rotatably connected to one side near the sliding groove (516). The mounting frame (511) has an adjustment component (53) on the side near the pulley (517).
5. The urea granulation apparatus according to claim 4, characterized in that, The transmission assembly (52) includes a rotating rod (521), a bevel gear (523), a bevel gear (524), a spur gear (526), and a bevel gear (527). The rotating rod (521) is rotatably connected to the inner wall of the mounting frame (511). One end of the rotating rod (521) passes through the mounting frame (511) and is connected to the rotating roller (551). The bevel gear (523) is mounted on the rotating rod (521). The bevel gear (524) and the bevel gear (527) are respectively meshed and connected to the top and bottom of one side of the bevel gear (523). The spur gear (526) is mounted on the bevel gear (524). A rotating rod (528) is mounted on the bevel gear (527). One end of the rotating rod (528) passes through the mounting frame (511) and is connected to the connecting rod (542).
6. The urea granulation apparatus according to claim 5, characterized in that, The drying mechanism (30) is provided with a toothed ring (56) that meshes with the sprocket (526) to drive the sprocket (526) to rotate.
7. The urea granulation apparatus according to claim 6, characterized in that, The adjustment assembly (53) includes a turntable (531) mounted on a rotating rod (521), a hinge (532) hinged to the turntable (531), a slider (533) hinged to the hinge (532), and a pull rope (535) connected to the slider (533). A slide rail (534) mounted on a mounting frame (511) is slidably connected to the slider (533). One end of the pull rope (535) passes around a pulley (517) and is mounted on a sliding plate (555).
8. The urea granulation apparatus according to any one of claims 1-7, characterized in that, The rotating mechanism (40) includes a rotating shaft (41) and multiple sets of pushing components mounted on the rotating shaft (41). The pushing components are used to push the material to move. The top of the rotating shaft (41) is connected to a motor (12) mounted on the top of the housing (11).
9. The urea granulation apparatus according to claim 8, characterized in that, The feeding assembly includes multiple rakes (42) and multiple rake blades (43) installed at equal intervals on the rakes (42), with the rake blades (43) on each adjacent pair of rakes (42) being staggered.
10. The urea granulation apparatus according to claim 8, characterized in that, Multiple mounting brackets (44) are installed on the outer side of the rotating shaft (41), and the receiving mechanism (50) is mounted on the mounting brackets (44).