Scraping device for granulation tower

Abstract

The utility model discloses a material scraping device for a prilling tower. The material scraping device comprises a prilling tower main body and a prilling tower pot bottom, by adopting the spring and the scrapers, when more urea particles are attached to the bottom of the prilling tower, the scraping cylinder can be driven to rotate at a high speed through the operation of the driving motor, and when the scraping cylinder rotates, the scrapers at the bottoms of the multiple groups of scraping arms on the surface of the scraping cylinder can scrape off the urea particles attached to the surface of the scraping cylinder; due to the fact that the spring is arranged at the top of the scraper, the scraper can continuously conduct scraping operation along the tops of urea particles, and after a certain amount of urea particles are scraped, the scraper is continuously pushed downwards by a certain distance through deformation of the spring, so that the scraper can conduct multiple times of gentle scraping operation on the urea particles. The scraping device is simple in structure and convenient to operate, avoids traction damage to the surface of the granulation tower caused by direct contact between the scraper and particles, further reduces damage during scraping, prolongs the service life of the scraper and the granulation tower, and has the advantages of being small in scraping damage and self-adaptive in scraping.

Description

Technical Field

[0001] This utility model relates to the field of scraping technology for granulators, and more specifically, to a scraping device for granulation towers. Background Technology

[0002] With the development of the times and the continuous progress of industrial technology, the requirements for the quality of finished urea products are becoming increasingly stringent. In particular, the problems of caking and high dust content in finished urea products have become an important factor affecting the sales and production applications of urea products. In the traditional scraper urea recovery process, the scraper rotates its scraper arm and uses the scraper blades at the bottom of the scraper arm to recover the urea particles that naturally fall to the bottom of the granulation tower. The scraper blades are arranged vertically to the bottom of the granulation tower. As the scraper arm moves forward, the scraper blades compress the urea, causing it to gradually collect at the bottom discharge port. During this process, due to the compression of the urea by the scraper blades, some urea particles are damaged, forming urea dust, which affects the quality of the finished urea product.

[0003] The existing publicly available technology, with publication number CN217568614U, discloses a granulation tower urea particle recovery and processing device, comprising: a granulation tower with a granulation tower pot bottom at the bottom, the size of which matches the internal size of the granulation tower; a connecting column positioned directly above the granulation tower pot bottom; and an air pipe connecting plate positioned directly above the scraper arm, the air pipe connecting plate having a hollow cylindrical structure. The beneficial effects are: the scraper adopts a curved surface design, changing the original method of pushing urea particles into the urea discharge port to a method of pushing them through an inclined surface, thus reducing the breakage rate of urea particles caused by compression; the contact point between the scraper and urea changes from the original planar pushing to rapid contact and immediate separation with a blade-like tip; through the above structure, the urea particles are transferred to the end of the scraper in a sliding manner, and under the action of inertia, they fly sequentially towards the discharge port, playing a cooling role during their entry into the scraper discharge port.

[0004] However, the aforementioned patent still has certain drawbacks in its use: when scraping urea particles in the granulation tower, it uses air pipes to blow the urea particles. Although this can gather the urea particles towards the center, the turbulence of the gas can easily cause urea dust to float, which not only pollutes the scraping environment but also causes the floating urea dust to overflow through the discharge port, leading to threats to the environment and workers, as well as a reduction in the amount collected. Furthermore, the distance between the scraper and the urea cannot be adjusted. When the urea particles are large and adhere tightly to the bottom of the granulation tower, direct impact contact can cause significant damage to the granulation tower. In the long run, this will not only damage the scraper but also destroy the granulation tower, reducing the service life of the equipment. Overall, the usage effect is not very good.

[0005] There are currently no effective solutions to the problems in the relevant technologies. Utility Model Content

[0006] (1) Technical problems solved

[0007] To address the shortcomings of existing technologies, this utility model provides a scraping device for granulation towers, which has the advantages of minimal scraping damage, dust absorption, and adaptive scraping, thereby solving the problems mentioned in the background technology.

[0008] (2) Technical solution

[0009] To achieve the advantages of minimal scraping damage, dust absorption, and adaptive scraping, the specific technical solution adopted by this utility model is as follows:

[0010] A scraping device for a granulation tower includes a granulation tower body and a granulation tower pot bottom. The bottom of the granulation tower is provided with a granulation tower pot bottom. A scraper cylinder is provided at the grooved part of the bottom of the granulation tower pot bottom. A drive shaft is fixedly installed at the bottom of the scraper cylinder. Several sets of scraper arms are connected around the surface of the scraper cylinder. Several sets of receiving grooves are evenly opened inside the bottom surface of the scraper arms. An anti-detachment plate is slidably connected inside the receiving groove. A spring is fixedly installed on one side of the anti-detachment plate at the bottom of the receiving groove. A connecting rod is fixedly installed on the other side of the anti-detachment plate. A scraper is obliquely installed at the bottom of the connecting rod.

[0011] Furthermore, an expansion plate is symmetrically installed at the middle position of both sides of the scraper arm, and several sets of suction hoods are evenly installed at the bottom surface of the expansion plate. A limit ring is rotatably connected to the top of the inside of the scraper cylinder. An outlet pipe is installed at the bottom of the limit ring, and a negative pressure hood is installed at the bottom of the outlet pipe. A suction pipe is connected through the top of the limit ring, and a negative pressure fan is connected in the middle of the suction pipe. Cavities for gas flow are opened inside the expansion plate, inside the scraper arm, and inside the scraper cylinder.

[0012] Furthermore, a transmission wheel is welded to the surface of the drive shaft, and a transmission chain is connected to the outer circumference of the transmission wheel. The other side of the transmission chain is connected to the output end of the drive motor.

[0013] Furthermore, the scraper structure is adapted to the bottom structure of the granulation tower.

[0014] Furthermore, an annular groove is provided at the top of the inside of the scraper cylinder for the rotation of the limiting ring.

[0015] Furthermore, a collection box is provided between the negative pressure fan and the suction pipe.

[0016] Furthermore, the scraper is made of metal.

[0017] (3) Beneficial effects

[0018] Compared with the prior art, the present invention provides a scraping device for a granulation tower, which has the following beneficial effects:

[0019] (1) This utility model adopts a spring and a scraper. In actual use, when there are a lot of urea particles attached to the bottom of the granulation tower, the drive motor can drive the drive shaft to rotate, which in turn drives the scraper to rotate at high speed. When the scraper rotates, the scrapers at the bottom of the multiple scraper arms on its surface can scrape off the urea particles attached to the surface. Since the top of the scraper is equipped with a spring, the scraper can continuously scrape along the top of the urea particles. After scraping off a certain amount, the deformation of the spring can push the scraper downwards a certain distance, so that the scraper can perform multiple gentle scraping operations on the urea particles, avoiding the pulling damage to the surface of the granulation tower caused by the scraper directly contacting the particles, thereby reducing the damage during scraping and improving the service life of the scraper and the granulation tower. It has the advantages of low scraping damage and adaptive scraping.

[0020] (2) This utility model adopts a negative pressure fan, a suction hood, a negative pressure cover, an outlet pipe, and a suction pipe. When the scraper rotates at high speed, the negative pressure fan at the top can also run synchronously. At this time, the negative pressure generated by the operation of the negative pressure fan can suck the urea dust into the scraper through the suction hood and into the outlet pipe through the internal negative pressure cover. It can then be transported to the suction pipe for discharge, avoiding the dust from scattering and overflowing during scraping. This can effectively reduce dust pollution and urea loss, improve the overall scraping collection rate, facilitate better use, and has the advantage of dust absorption. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of a scraping device for a granulation tower proposed in this utility model;

[0023] Figure 2 This is a schematic diagram of the internal structure of the receiving groove of this utility model;

[0024] Figure 3 This is a schematic diagram of the structure of the expansion plate of this utility model;

[0025] Figure 4 This is a schematic diagram of the connection between the limiting ring and the negative pressure cover of this utility model.

[0026] In the picture:

[0027] 1. Granulation tower body; 2. Negative pressure fan; 3. Suction pipe; 4. Granulation tower bottom; 5. Scraper arm; 6. Expansion plate; 7. Suction hood; 8. Limiting ring; 9. Outlet pipe; 10. Negative pressure hood; 11. Receiving tank; 12. Spring; 13. Anti-detachment plate; 14. Connecting rod; 15. Scraper; 16. Drive motor; 17. Transmission wheel; 18. Transmission chain; 19. Drive shaft; 20. Scraper cylinder. Detailed Implementation

[0028] To further illustrate the various embodiments, the present invention provides accompanying drawings, which are part of the disclosure of the present invention. These drawings are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, those skilled in the art should be able to understand other possible implementation methods and the advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0029] According to an embodiment of the present invention, a scraping device for a granulation tower is provided.

[0030] The present invention will now be further described with reference to the accompanying drawings and specific embodiments. Figure 1-4 As shown, a scraping device for a granulation tower according to an embodiment of the present invention includes a granulation tower body 1 and a granulation tower pot bottom 4. The bottom of the granulation tower is provided with a granulation tower pot bottom 4. A scraper cylinder 20 is provided at the grooved part of the bottom of the granulation tower pot bottom 4. A drive shaft 19 is fixedly installed at the bottom of the scraper cylinder 20. Several sets of scraper arms 5 are connected around the surface of the scraper cylinder 20. Several sets of receiving grooves 11 are evenly opened inside the bottom surface of the scraper arms 5. An anti-detachment plate 13 is slidably connected inside the receiving groove 11. A spring 12 is fixedly installed on one side of the anti-detachment plate 13 at the bottom end of the receiving groove 11. A connecting rod 14 is fixedly installed on the other side of the anti-detachment plate 13. A scraper 15 is obliquely installed at the bottom of the connecting rod 14.

[0031] In one embodiment, an extension plate 6 is symmetrically installed at the middle position of both sides of the scraper arm 5, and several sets of suction hoods 7 are evenly installed at the bottom surface of the extension plate 6. A limiting ring 8 is rotatably connected to the top position inside the scraper cylinder 20, and an outlet pipe 9 is installed at the bottom position of the limiting ring 8. A negative pressure hood 10 is installed at the bottom position of the outlet pipe 9, and a suction pipe 3 is connected through the top position of the limiting ring 8. A negative pressure fan 2 is connected in the middle of the suction pipe 3. Cavities for gas flow are opened inside the extension plate 6, the scraper arm 5, and the scraper cylinder 20. The cavity is designed to facilitate the flow of urea dust.

[0032] In one embodiment, a transmission wheel 17 is welded to the surface of the drive shaft 19, and a transmission chain 18 is connected to the outer periphery of the transmission wheel 17. The other side of the transmission chain 18 is connected to the output end of the drive motor 16. The transmission chain 18 and the transmission wheel 17 are arranged so that the drive motor 16 can drive the drive shaft 19 to run.

[0033] In one embodiment, the scraper arm 5 structure is adapted to the granulation tower bottom 4 structure. The adaptation of the scraper arm 5 structure is to enable it to rotate smoothly in the granulation tower bottom 4. If the granulation tower bottom 4 is an arc-shaped structure, it can be set to a corresponding arc-shaped structure.

[0034] In one embodiment, an annular groove is provided at the top of the inside of the scraper cylinder 20 for the limit ring 8 to rotate. The annular groove is provided to facilitate the rotation of the limit ring 8.

[0035] In one embodiment, an annular groove is provided at the top of the inside of the scraper cylinder 20 for the limit ring 8 to rotate. The annular groove is provided to facilitate the rotation of the limit ring 8.

[0036] In one embodiment, the scraper 15 is made of metal, which ensures the strength of the scraper 15 and prevents it from breaking during scraping.

[0037] Working Principle: In actual use, when a large amount of urea particles adhere to the bottom 4 of the granulation tower, the drive motor 16 drives the drive shaft 19 to rotate, which in turn drives the scraper cylinder 20 to rotate at high speed. When the scraper cylinder 20 rotates, the scrapers 15 at the bottom of the multiple sets of scraper arms 5 on its surface can scrape off the urea particles adhering to the surface. Since the top of the scraper 15 is equipped with a spring 12, the scraper 15 can continuously scrape along the top of the urea particles. After scraping off a certain amount, the deformation of the spring 12 can push the scraper 15 downwards a certain distance, so that the scraper 15 can perform multiple gentle scraping operations on the urea particles, avoiding direct contact between the scraper 15 and the particles. The device reduces the pulling damage to the surface of the granulation tower caused by contact, thereby reducing damage during scraping and improving the service life of the scraper 15 and the granulation tower. At the same time, when the scraper cylinder 20 rotates at high speed, the negative pressure fan 2 at its top can also run synchronously. At this time, the negative pressure generated by the operation of the negative pressure fan 2 can draw urea dust into the scraper cylinder 20 through the suction hood 7, and then draw it into the outlet pipe 9 through the internal negative pressure hood 10, and then transport it to the suction pipe 3 for discharge. This avoids the dust from scattering and overflowing during scraping, effectively reducing dust pollution and urea loss, improving the overall scraping collection rate, and facilitating better use. The device as a whole has the advantages of low scraping damage, dust absorption, and adaptive scraping.

[0038] In the present invention, unless otherwise clearly stipulated and limited, the terms "install", "set", "connect", "fix", "screw" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0039] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A scraping device for a granulation tower, comprising a granulation tower body (1) and a granulation tower bottom (4), characterized in that, The bottom of the granulation tower is provided with a granulation tower pot bottom (4). A scraper cylinder (20) is provided at the bottom groove of the granulation tower pot bottom (4). A drive shaft (19) is fixedly installed at the bottom of the scraper cylinder (20). Several sets of scraper arms (5) are connected around the surface of the scraper cylinder (20). Several sets of receiving grooves (11) are evenly opened inside the bottom surface of the scraper arms (5). An anti-detachment plate (13) is slidably connected inside the receiving groove (11). A spring (12) is fixedly installed on one side of the anti-detachment plate (13) at the bottom of the receiving groove (11). A connecting rod (14) is fixedly installed on the other side of the anti-detachment plate (13). A scraper (15) is installed at an angle at the bottom of the connecting rod (14).

2. The scraping device for a granulation tower according to claim 1, characterized in that, An expansion plate (6) is symmetrically installed on the middle of both sides of the scraper arm (5). Several sets of suction hoods (7) are evenly installed on the bottom surface of the expansion plate (6). A limiting ring (8) is rotatably connected to the top of the scraper cylinder (20). An outlet pipe (9) is installed at the bottom of the limiting ring (8). A negative pressure hood (10) is installed at the bottom of the outlet pipe (9). A suction pipe (3) is connected through the top of the limiting ring (8). A negative pressure fan (2) is connected in the middle of the suction pipe (3). A cavity for gas flow is opened in the interior of the expansion plate (6), the interior of the scraper arm (5), and the interior of the scraper cylinder (20).

3. The scraping device for a granulation tower according to claim 1, characterized in that, A transmission wheel (17) is welded to the surface of the drive shaft (19), and a transmission chain (18) is connected to the outer periphery of the transmission wheel (17). The other side of the transmission chain (18) is connected to the output end of the drive motor (16).

4. The scraping device for a granulation tower according to claim 1, characterized in that, The scraper arm (5) structure is adapted to the bottom (4) structure of the granulation tower.

5. The scraping device for a granulation tower according to claim 1, characterized in that, The scraper (20) has an annular groove at the top of its interior for the rotation of the limiting ring (8).

6. A scraping device for a granulation tower according to claim 2, characterized in that, A collection box is provided between the negative pressure fan (2) and the suction pipe (3).

7. A scraping device for a granulation tower according to claim 1, characterized in that, The scraper (15) is made of metal.

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