Urea dust recovery and regranulation device
Patent Information
- Application Number
- CN202522317843.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-31
- Publication Date
- 2026-09-25
- Estimated Expiration
- 2035-10-31
AI Technical Summary
但在实际生产过程中，尿液中存在各工序残留及设备脱落的硫化锌渣、填料纤维、焊渣等杂质，造粒时，该杂质逐渐附着在喷头内壁上，并逐步将喷头喷孔堵塞，需要在停机状态下对喷头进行拆装更换后才能继续生产，而现有喷头与传动轴之间多通过焊接或螺纹固定，这样在拆装喷头的时候，不便于施力，操作不便且较为费时费力，不够实用，有待解决
[0012]本实用新型的有益效果是：再造粒加工时，处理后的尿素溶液可先经尿液输送管路输送到进液箱中，并通过空心的转轴进入喷头中，喷头随转轴同步转动，在喷头的旋转作用下，利用离心力将尿液从喷头上面的小孔喷出形成液滴，液滴在下落过程中，与从造粒塔的塔体下部进入的空气逆流接触，历经液体变固体、固体冷却等过程，最终形成尿素颗粒掉落到造粒塔的底部大锅底上，并被该处的刮料机刮掉后通过下料口排出。使用一段时间后，当喷头出现问题需要更换时，可在停机状态下先通过拉把向上拉动限位块两侧上的活动杆，将对应锁定柱从相应锁定盲孔中抽出后，即可解除对限位块的锁定，再将限位块转动90度，使其与相应定位块对准，即可解除对上凸缘的抵压限位，此时，压缩弹簧被进一步压缩，锁定柱位于对应活动槽中。之后，下移喷头，便可将原有喷头拆卸下来。接着，取来新的喷头，先将其顶端插入转轴，插入时，使限位块对准相应通槽，直至下凸缘抵接到上凸缘上，即插接到位，此时定位块插接到位在对应的通槽中，实现对喷头的初步定位安装，且此时的限位块的底面可与上凸缘的顶面平齐。然后，将限位块转动90度，使其与通槽垂直，即可使限位块抵压在上凸缘的顶面上，以此来将上凸缘和下凸缘夹紧固定住，完成对喷头的进一步限位固定安装。同时，当限位块转动到位时，锁定柱可与相应锁定盲孔对准，在压缩弹簧的复位弹力作用下，锁定柱可被自动弹向并插接到位在对应锁定盲孔中，从而将限位块锁定，避免限位块随意转动，保证对喷头安装固定的牢固性。以此，可实现对喷头的灵活且便捷地拆装更换，整体操作简便且省时省力，更加实用。
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Figure CN224793428U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of granulation technology, specifically relating to a urea dust recovery and regranulation device. Background Technology
[0002] Currently, a large amount of dust is generated in the packaging section during the urea production process. To achieve dust recycling, existing methods typically involve first collecting the dust using dust collection equipment, then conveying it to a dissolving tank via weighing belts or other conveying equipment. After concentration calculation and proportioning, the dust is thoroughly stirred and dissolved using the urea production system's own steam condensate. Once the dissolved urea reaches a certain concentration, it is recycled to a urea tank for temporary storage. Then, depending on the actual situation, the urea is evaporated and concentrated before being sent to an evaporation granulation tower or fluidized bed granulation equipment for regranulation.
[0003] When granulation is carried out using a granulation tower, urine is pumped to the top of the granulation tower by a melt pump. At the top of the tower, it enters the feed inlet of the granulator and then enters the granulation nozzle. Under the rotation of the nozzle, centrifugal force is used to spray the urine out of the small holes on the nozzle to form droplets. During the fall, the droplets come into countercurrent contact with the air entering from the bottom of the tower and undergo processes such as liquid to solid and solid cooling. Finally, they form urea granules that fall to the bottom of the large pot at the bottom of the tower and are scraped off by the scraper there before being discharged through the discharge port. However, in actual production, urine contains impurities such as residual zinc sulfide slag, filler fibers, and welding slag from various processes and equipment. During granulation, these impurities gradually adhere to the inner wall of the nozzle and gradually clog the nozzle orifice. Production can only continue after the nozzle is disassembled and replaced while the machine is stopped. Currently, the nozzle and drive shaft are mostly fixed by welding or threads, which makes it inconvenient to apply force when disassembling and assembling the nozzle, and the operation is inconvenient, time-consuming and labor-intensive. This is not practical and needs to be solved. Utility Model Content
[0004] In view of this, the purpose of this utility model is to provide a urea dust recovery and regranulation device that enables convenient disassembly and replacement of the nozzle, so as to solve the above problems.
[0005] To achieve the above objectives, the technical solution adopted by this utility model is: a urea dust recovery and re-granulation device, comprising a urine conveying pipeline, a granulation tower, and a granulator located on the upper part of the granulation tower. The granulator includes an inlet tank, one side of which is fixedly connected to the side wall of the granulation tower, the top of which is connected to the urine conveying pipeline, and a transmission box fixedly connected to the bottom. A hollow rotating shaft is vertically penetrating and rotatably mounted on the transmission box. The top end of the rotating shaft extends into the inlet tank and is rotatably connected to the bottom of the inlet tank. An upper flange is fixedly mounted on the circumferential side of the bottom end. Several rectangular through slots are circumferentially spaced on the upper flange. Locking blind holes are provided on the top surfaces of the upper flange on both sides of the width direction of the through slots. A nozzle is provided below the upper flange, and a lower flange is fixedly mounted on the circumferential side of the top end of the nozzle. A plurality of circumferentially spaced positioning blocks are fixedly mounted on the top of the lower flange. A limit block is rotatably connected to the top of the positioning block. Movable grooves are opened on both sides of the bottom of the limit block along its length. A compression spring is fixedly mounted on the top of the movable groove. A baffle is fixedly connected to the bottom of the compression spring. A movable rod is coaxially fixed on the top of the baffle and a locking pin is coaxially fixed on the bottom. The movable rod is sleeved inside the compression spring and its top end passes through the limit block and is fixedly connected to a pull handle. The top end of the nozzle is inserted into the bottom end of the rotating shaft. The lower flange abuts against the bottom of the upper flange. The positioning blocks correspond one-to-one with the through grooves and are inserted into the corresponding through grooves. The limit blocks pass through the corresponding through grooves and abut against the top of the upper flange after rotating 90 degrees. The locking pin is inserted into the corresponding locking blind hole.
[0006] Preferably, a motor is fixedly installed in the transmission box, the output shaft of the motor faces downward and is coaxially fixedly sleeved with a drive gear, and a driven gear is coaxially fixedly sleeved on the rotating shaft on one side of the drive gear, and the driven gear is meshed with the drive gear.
[0007] Preferably, an inspection port is provided on the side of the granulation tower on one side of the granulator, and the inspection port is equipped with a sealing door that can be opened and closed.
[0008] Preferably, a sealing gasket is fixed on the bottom of the upper flange.
[0009] Preferably, the lower flange is adapted to the upper flange.
[0010] Preferably, both the positioning block and the limiting block are adapted to the corresponding through slot.
[0011] Preferably, the locking pin is adapted to the corresponding locking blind hole.
[0012] The beneficial effects of this utility model are as follows: During the regranulation process, the treated urea solution can first be transported to the inlet tank through the urine conveying pipeline, and then enter the nozzle through the hollow rotating shaft. The nozzle rotates synchronously with the rotating shaft. Under the rotation of the nozzle, the urine is sprayed out from the small hole on the nozzle to form droplets by centrifugal force. During the falling process, the droplets come into countercurrent contact with the air entering from the bottom of the granulation tower. After undergoing the processes of liquid to solid and solid cooling, the droplets finally form urea particles that fall to the bottom of the large pot at the bottom of the granulation tower and are scraped off by the scraper there before being discharged through the discharge port. After a period of use, when the nozzle needs replacement due to a problem, with the machine stopped, first pull the movable rods on both sides of the limit block upwards using the handle. This will pull the corresponding locking pin out of the corresponding locking blind hole, releasing the lock on the limit block. Then, rotate the limit block 90 degrees to align it with the corresponding positioning block, releasing the pressure limit on the upper flange. At this point, the compression spring is further compressed, and the locking pin is located in the corresponding movable groove. Afterwards, lower the nozzle to remove the old nozzle. Next, take the new nozzle and insert its top into the rotating shaft. During insertion, align the limit block with the corresponding through groove until the lower flange abuts against the upper flange, thus inserting it into place. At this point, the positioning block is inserted into the corresponding through groove, achieving initial positioning and installation of the nozzle. The bottom surface of the limit block should be flush with the top surface of the upper flange. Then, rotate the limiting block 90 degrees so that it is perpendicular to the through groove. This allows the limiting block to press against the top surface of the upper flange, clamping and fixing the upper and lower flanges, thus completing the further limiting and fixing installation of the nozzle. Simultaneously, when the limiting block is rotated to its correct position, the locking pin aligns with the corresponding locking blind hole. Under the return force of the compression spring, the locking pin is automatically springed forward and inserted into the corresponding locking blind hole, thereby locking the limiting block and preventing it from rotating freely, ensuring the secure installation and fixing of the nozzle. This allows for flexible and convenient disassembly and replacement of the nozzle, making the overall operation simple, time-saving, and labor-saving, and more practical. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the main structure of this utility model; Figure 2 This is a schematic diagram of the main structure of the granulator of this utility model; Figure 3 This is a schematic diagram of the main structure of the upper flange of this utility model; Figure 4 This is a top view of the upper flange of this utility model. Figure 5 This is a schematic diagram of the main structure of the lower flange of this utility model; Figure 6 This is a top view of the lower flange of this utility model. Figure 7 This is a schematic diagram of the main structure of the positioning block and the limiting block of this utility model; Figure 8 This is a front view structural diagram of the connection between the upper flange and the lower flange of this utility model; Figure 9 This is a top view of the structure when the upper flange and the lower flange of this utility model are connected.
[0014] The following numbers are labeled in the diagram: 1 is the urine delivery pipeline, 2 is the granulation tower, 3 is the inlet tank, 4 is the transmission box, 5 is the rotating shaft, 6 is the upper flange, 7 is the through groove, 8 is the locking blind hole, 9 is the nozzle, 10 is the lower flange, 11 is the positioning block, 12 is the limit block, 13 is the movable groove, 14 is the compression spring, 15 is the baffle plate, 16 is the movable rod, 17 is the locking pin, 18 is the pull handle, 19 is the motor, 20 is the driving gear, 21 is the driven gear, 22 is the inspection port, 23 is the sealing door, and 24 is the sealing gasket. Detailed Implementation
[0015] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments: like Figures 1 to 9 As shown, a urea dust recovery and granulation device includes a urea conveying pipeline 1, a granulation tower 2, and a granulator located on the upper part of the granulation tower 2. The granulator includes an inlet tank 3, one side of which is fixedly connected to the side wall of the granulation tower 2, the top of which is connected to the urea conveying pipeline 1, and a transmission box 4 fixedly connected to the bottom. A hollow rotating shaft 5 is vertically inserted and rotatably mounted on the transmission box 4. The top end of the rotating shaft 5 extends into the inlet tank 3 and is rotatably connected to the bottom of the inlet tank 3. An upper flange 6 is fixedly mounted on the circumferential side of the bottom end. Several rectangular through slots 7 are distributed circumferentially on the upper flange 6. Locking blind holes 8 are provided on the top surface of the upper flange 6 on both sides of the width direction of the through slots 7. A nozzle 9 is provided below the upper flange 6. The nozzle 9 has a lower flange 10 fixedly mounted on its top periphery. Several positioning blocks 11 are evenly distributed in a circular pattern on the top of the lower flange 10. The top of the positioning blocks 11 is rotatably connected to a limit block 12. The bottom of both sides of the limit block 12 in the length direction is provided with movable grooves 13. The top of the movable groove 13 is fixedly mounted with a compression spring 14. The bottom of the compression spring 14 is fixedly connected with a baffle 15. The top of the baffle 15 is coaxially fixed with a movable rod 16 and the bottom is coaxially fixed with a locking post 17. The movable rod 16 is sleeved inside the compression spring 14 and its top end passes through the limit block 12 and is fixedly connected with a pull handle 18. The top of the nozzle 9 is inserted into the bottom of the rotating shaft 5, the lower flange 10 abuts against the bottom of the upper flange 6, the positioning block 11 corresponds to the through groove 7 and is inserted into the corresponding through groove 7, the limiting block 12 passes through the corresponding through groove 7 and abuts against the top of the upper flange 6 after rotating 90 degrees, and the locking pin 17 is inserted into the corresponding locking blind hole 8. During the regranulation process, the treated urea solution is first transported to the inlet tank 3 through the urine delivery pipeline 1, and then enters the nozzle 9 through the hollow rotating shaft 5. The nozzle 9 rotates synchronously with the rotating shaft 5. Under the rotation of the nozzle 9, the urine is sprayed out from the small holes on the nozzle 9 to form droplets by centrifugal force. During the falling process, the droplets come into countercurrent contact with the air entering from the bottom of the granulation tower 2. After undergoing processes such as liquid to solid and solid cooling, the droplets finally form urea particles that fall to the bottom of the large pot at the bottom of the granulation tower 2 and are scraped off by the scraper there before being discharged through the discharge port. After a period of use, when the nozzle 9 malfunctions and needs replacement, in the stopped state, first pull the movable rods 16 on both sides of the limiting block 12 upwards using the pull handle 18. This will pull the corresponding locking pin 17 out of the corresponding locking blind hole 8, releasing the lock on the limiting block 12. Then, rotate the limiting block 12 90 degrees to align it with the corresponding positioning block 11, releasing the pressure limit on the upper flange 6. At this point, the compression spring 14 is further compressed, and the locking pin 17 is located in the corresponding movable groove 13. Afterwards, lower the nozzle 9 to remove the old nozzle 9. Next, take the new nozzle 9 and insert its top end into the rotating shaft 5. During insertion, align the limiting block 12 with the corresponding through groove 7 until the lower flange 10 abuts against the upper flange 6, thus inserting it into place. At this point, the positioning block 11 is inserted into the corresponding through groove 7, achieving initial positioning and installation of the nozzle 9. The bottom surface of the limiting block 12 is flush with the top surface of the upper flange 6. Then, rotate the limiting block 12 90 degrees so that it is perpendicular to the through groove 7, so that the limiting block 12 presses against the top surface of the upper flange 6, thereby clamping and fixing the upper flange 6 and the lower flange 10, completing the further limiting and fixing installation of the nozzle 9. At the same time, when the limiting block 12 is rotated into place, the locking pin 17 can be aligned with the corresponding locking blind hole 8. Under the return force of the compression spring 14, the locking pin 17 can be automatically springed and inserted into the corresponding locking blind hole 8, thereby locking the limiting block 12, preventing the limiting block 12 from rotating at will, and ensuring the firmness of the installation and fixing of the nozzle 9. In this way, the nozzle 9 can be flexibly and conveniently disassembled and replaced. The overall operation is simple, time-saving and labor-saving, and more practical. The lower air inlet unit, the bottom pot receiving unit and the discharge unit, the top exhaust unit and other structures of the granulation tower 2 (not shown in the figure) can all adopt existing technology, which is existing technology and will not be described in detail here.
[0016] In this embodiment, a motor 19 is fixedly installed in the transmission box 4. The output shaft of the motor 19 faces downward and is coaxially fixedly sleeved with a drive gear 20. A driven gear 21 is coaxially fixedly sleeved on the rotating shaft 5 on one side of the drive gear 20. The driven gear 21 meshes with the drive gear 20, so that during granulation, the motor 19 can provide power to drive the rotating shaft 5 and the nozzle 9 to rotate synchronously through gear transmission, thereby achieving granulation.
[0017] In this embodiment, an inspection port 22 is provided on the side of the granulation tower 2 on one side of the granulator, and a sealing door 23 is provided on the inspection port 22 that can be opened and closed, so that when it is necessary to inspect or replace the nozzle 9, the corresponding operation can be performed through the inspection port. The specific method and structure of the opening and closing connection of the sealing door 23 can be adopted using existing technology, and will not be described in detail here.
[0018] In this embodiment, a sealing gasket 24 is fixed on the bottom of the upper flange 6 to ensure the sealing of the connection between the nozzle 9 and the rotating shaft 5 and to prevent leakage.
[0019] In this embodiment, the lower flange 10 is adapted to the upper flange 6 to ensure that the nozzle 9 is smoothly inserted, positioned and installed in place.
[0020] In this embodiment, both the positioning block 11 and the limiting block 12 are adapted to the corresponding through groove 7 to ensure that the nozzle 9 can be smoothly inserted, positioned and installed in place, and to ensure that the limiting block 12 can rotate smoothly and press against and limit the upper flange 6 for fixation.
[0021] In this embodiment, the locking post 17 is adapted to the corresponding locking blind hole 8 to ensure that the locking post 17 is smoothly inserted into place and cooperates to lock the limit block 12.
[0022] 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 urea dust recovery and regranulation device, comprising a urea conveying pipeline, a granulation tower, and a granulator disposed at the top of the granulation tower, characterized in that, The granulator includes a liquid inlet tank, one side of which is fixedly connected to the side wall of the granulation tower, the top of which is connected to a urine delivery pipeline, and the bottom of which is fixedly connected to a transmission box. A hollow rotating shaft is vertically inserted through and rotatably mounted on the transmission box. The top end of the rotating shaft extends into the liquid inlet tank and is rotatably connected to the bottom of the liquid inlet tank. An upper flange is fixedly mounted on the circumferential side of the bottom end. Several rectangular through slots are provided on the upper flange at circumferential intervals. Locking blind holes are provided on the top surfaces of the upper flange on both sides of the width direction of the through slots. A nozzle is provided below the upper flange. A lower flange is fixedly mounted on the circumferential side of the top of the nozzle. Several positioning blocks are fixedly mounted on the top of the lower flange at circumferential intervals. The part is rotatably connected to a limiting block. Movable grooves are provided on both sides of the bottom of the limiting block along its length. A compression spring is fixedly mounted on the top of the movable groove. A baffle is fixedly connected to the bottom of the compression spring. A movable rod is coaxially fixed on the top of the baffle, and a locking pin is coaxially fixed on the bottom. The movable rod is sleeved inside the compression spring, and its top end passes through the limiting block and is fixedly connected to a pull handle. The top end of the nozzle is inserted into the bottom end of the rotating shaft. The lower flange abuts against the bottom of the upper flange. The positioning block corresponds one-to-one with the through groove and is inserted into the corresponding through groove. The limiting block passes through the corresponding through groove and abuts against the top of the upper flange after rotating 90 degrees. The locking pin is inserted into the corresponding locking blind hole.
2. The urea dust recovery and regranulation device according to claim 1, characterized in that, A motor is fixedly installed in the transmission box. The output shaft of the motor faces downward and is coaxially fixedly sleeved with a drive gear. A driven gear is coaxially fixedly sleeved on the rotating shaft on one side of the drive gear. The driven gear meshes with the drive gear.
3. The urea dust recovery and regranulation device according to claim 1, characterized in that, An inspection port is provided on the side of the granulation tower on one side of the granulator, and a sealing door is provided on the inspection port that can be opened and closed.
4. The urea dust recovery and regranulation device according to claim 1, characterized in that, A sealing gasket is fixedly provided on the bottom of the upper flange.
5. The urea dust recovery and regranulation device according to claim 1, characterized in that, The lower flange is adapted to the upper flange.
6. The urea dust recovery and regranulation device according to claim 1, characterized in that, Both the positioning block and the limiting block are adapted to the corresponding through slots.
7. The urea dust recovery and regranulation device according to claim 1, characterized in that, The locking pin is adapted to the corresponding locking blind hole.