Round particle high tower granulation method and double-layer ventilation collecting device

Abstract

The present invention discloses a round particle high-tower granulation method and a double-layer ventilation and collecting device, which belongs to the technical field of compound fertilizer granulation equipment. It mainly includes an upper collecting platform, which is provided with a ventilation drop-out port and a spiral collecting mechanism matched with the ventilation drop-out port, a lower collecting platform is provided at the bottom of the upper collecting platform, a strip-shaped discharge port is provided on the lower collecting platform, a central ventilation hole is provided in the middle of the lower collecting platform, a slewing bearing is provided at the central ventilation hole, a fixed ring of the slewing bearing is fixedly connected to the lower collecting platform, the slewing ring of the slewing bearing is matched with the output end of the driving mechanism, and one or more slewing scrapers matched with the upper surface of the lower collecting platform are provided on the slewing ring of the slewing bearing. The method of the present invention allows the bottom of the high tower to continuously intake air to the top of the high tower, thereby accelerating the cooling of the fertilizer slurry and alleviating part of the gravity when the fertilizer slurry falls, so that the fertilizer particles after condensation change from a raindrop-shaped structure to a spherical structure.

Description

Technical Field

[0001] The invention belongs to the technical field of compound fertilizer granulation equipment, and in particular relates to a round particle high-tower granulation method and a double-layer ventilation and collecting device thereof. Background Art

[0002] In the fertilizer processing industry, a high-tower granulation process is usually used for granulation. That is, at the top of a tower with a diameter of 12-19 meters and a height of 80-130 meters, the fertilizer is melted into a liquid state and then sprayed down from the top of the tower. During the falling process, the liquid fertilizer gradually cools and condenses into small solid particles in the shape of raindrops. Finally, the falling fertilizer particles fall to the bottom of the tower and are collected by a collecting machine. The fertilizer particles produced by the existing high-tower granulation method are uneven in size and raindrop-shaped. The particles are not round, and some fertilizer particles are not completely cooled during the falling process, resulting in the produced fertilizer particles being easy to agglomerate and dissolve. The product quality is not guaranteed and the qualified rate is not high. Summary of the Invention

[0003] The technical problem to be solved by the present invention is: to overcome the shortcomings of the existing technology and provide a round particle high-tower granulation method and a double-layer ventilation and collecting device. This method adds a double-layer ventilation and collecting device and an air inlet at the bottom of the tower, and cooperates with the exhaust device at the top of the tower to allow air to continuously flow from the bottom of the tower to the top of the tower, thereby accelerating the cooling of the fertilizer slurry and alleviating part of the gravity when the fertilizer slurry falls, so that the condensed fertilizer particles change from a raindrop-shaped structure to a spherical structure.

[0004] The double-layer ventilation collecting device includes an upper collecting table, which is provided with a ventilation blanking port and a spiral collecting mechanism cooperating with the ventilation blanking port. A lower collecting table is provided at the bottom of the upper collecting table, and a strip-shaped discharge port is provided on the lower collecting table. A central ventilation hole is provided in the middle of the lower collecting table, and a slewing support is provided at the central ventilation hole. The fixed ring of the slewing support is fixedly connected to the lower collecting table, and the slewing ring of the slewing support cooperates with the output end of the driving mechanism. The slewing ring of the slewing support is provided with one or more slewing scrapers cooperating with the upper surface of the lower collecting table.

[0005] Preferably, the ventilation blanking port is an annular structure, and a plurality of support beams are provided on the ventilation blanking port of the annular structure, and the upper receiving platforms on the inner and outer sides of the ventilation blanking port of the annular structure are connected and fixed by the support beams.

[0006] Preferably, the angle a between the lower material receiving platform and the horizontal plane is 5-10°, and a protective ventilation net is provided between the lower material receiving platform and the upper material receiving platform outside the ventilation blanking port.

[0007] Preferably, the spiral material collecting mechanism includes a central rotor, which is installed in the middle of the upper material collecting platform. A main beam is provided above the upper material collecting platform, and the main beam is rotatably installed on the central rotor. Rotating sports cars are respectively provided between the two ends of the main beam and the upper material collecting platform. The upper material collecting platform is provided with a sports car track that cooperates with the rotating sports car. A material blocking ring is provided on the inside of the rotating sports car. A screw conveyor and a beam scraper are provided at one end or both ends of the bottom of the main beam. The screw conveyor is arranged between the blocking ring and the periphery of the ventilation blanking port, and the beam scraper is arranged between the periphery of the ventilation blanking port and the middle of the upper material collecting platform.

[0008] Preferably, it also includes a high tower, the upper material receiving platform is connected to the inner wall of the high tower, and the two ends of the main beam are respectively provided with a tower bottom material receiver that cooperates with the inner wall of the high tower. An air inlet is provided on the high tower at the bottom of the upper material receiving platform, and a belt output machine that cooperates with the central ventilation hole is provided at the bottom of the lower material receiving platform.

[0009] Preferably, the high tower at the bottom of the upper material collecting platform is supported and fixed by a support beam.

[0010] The round particle high-tower granulation method includes the above-mentioned double-layer ventilation and collecting device, and the specific steps are as follows:

[0011] Step 1: Start the exhaust device at the top of the tower to continuously blow air from the bottom of the tower to the top of the tower;

[0012] Step 2: After the fertilizer raw materials and fillers are fully mixed and heated to melt, a fertilizer slurry is obtained, and the fertilizer slurry is sprayed downward through a granulation nozzle at the top of the tower;

[0013] Step 3: During the falling process, the fertilizer slurry is fully exposed to the air introduced from the bottom of the tower, which accelerates the cooling of the fertilizer particles. At the same time, the upward air offsets part of the gravity of the fertilizer slurry during its fall, causing the condensed fertilizer particles to change from a raindrop-shaped structure to a spherical structure.

[0014] Step 4: The fertilizer particles obtained in step 3 first fall into the upper receiving platform, and the spiral receiving mechanism is started. The spiral receiving mechanism discharges the fertilizer particles falling into the upper receiving platform through the ventilation outlet;

[0015] In step 5, the fertilizer particles fall onto the lower receiving table through the ventilation outlet, and the driving mechanism is started. The driving mechanism drives the rotary scraper to rotate through the slewing bearing, so that the fertilizer particles fall onto the belt conveyor through the strip outlet, and are finally transported to the next process by the belt conveyor.

[0016] Preferably, the vertical distance between the upper material collecting platform and the bottom of the tower is 6-8 meters.

[0017] Preferably, the vertical distance between the upper material receiving platform and the lower material receiving platform is 3-5 meters.

[0018] Preferably, the diameter of the central ventilation hole is 2-3 meters; the outer diameter of the annular ventilation opening is 16-20 meters, and the inner diameter of the annular ventilation opening is 10-15 meters.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The present invention adds a double-layer ventilation and collecting device at the bottom of the tower, a central ventilation hole is set at the center of the lower collecting platform, and a ventilation drop-out port is set on the upper collecting platform, which is staggered with the central ventilation hole in the vertical direction. When in use, the device cooperates with the exhaust device at the top of the tower. The top of the tower extracts air so that the incoming air blows continuously from bottom to top, thereby alleviating part of the gravity of the fertilizer slurry when it falls, accelerating the cooling of the fertilizer particles, and changing the condensed fertilizer particles from a raindrop-shaped structure to a spherical structure.

[0021] 2. The double-layer ventilation collecting device adopts two-layer collecting platforms set up upper and lower. The upper collecting platform is equipped with a ring-shaped ventilation drop-out port and cooperates with the spiral collecting mechanism to send the fertilizer particles falling to the upper collecting platform to the lower collecting platform through the ventilation drop-out port.

[0022] 3. The lower receiving platform is a downward-inclined bucket structure, and is equipped with a rotatable scraper to scrape the fertilizer particles on the lower receiving platform through the strip-shaped discharge port and discharge them onto the belt conveyor;

[0023] 4. A protective ventilation net is added between the upper collecting platform and the lower collecting platform. The protective ventilation net can not only prevent the fertilizer particles from scattering, but also ensure ventilation at the bottom of the tower. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the present invention;

[0025] Figure 2 for Figure 1 A partial enlarged view of part A;

[0026] Figure 3 Schematic diagram of the top structure of the upper material receiving platform;

[0027] Figure 4 This is a schematic diagram of the top view of the lower material receiving platform.

[0028] In the figure, 1. high tower; 2. upper receiving platform; 3. lower receiving platform; 4. belt conveyor; 5. slewing bearing; 6. center rotor; 7. main beam; 8. screw conveyor; 9. tower bottom receiver; 10. rotating sports car; 11. ventilation drop port; 12. rotary scraper; 13. sports car track; 14. center rotor mounting hole; 15. strip discharge port; 16. center ventilation hole; 17. support beam; 18. protective ventilation net; 19. material blocking ring; 20. beam scraper; 21. air inlet. DETAILED DESCRIPTION

[0029] The present invention will be further described below in conjunction with the accompanying drawings:

[0030] Example 1:

[0031] like Figure 1 As shown, the double-layer ventilation collecting device includes an upper collecting platform 2, which is a circular structure. The upper collecting platform 2 is provided with a ventilation drop-out port 11 and a spiral collecting mechanism that cooperates with the ventilation drop-out port 11. The bottom of the upper collecting platform 2 is provided with a lower collecting platform 3. Figure 4 As shown, a central ventilation hole 16 is provided in the middle of the lower receiving table 3, a strip-shaped discharge port 15 is provided on the lower receiving table 3, a slewing support 5 is provided at the central ventilation hole 16, the fixed ring of the slewing support 5 is fixedly connected to the lower receiving table 3, the slewing circle of the slewing support 5 is matched with the output end of the driving mechanism, and the slewing circle of the slewing support 5 is provided with one or more rotary scrapers 12 that cooperate with the upper surface of the lower receiving table 3, and the rotary scraper 12 is a cantilever structure; in this embodiment, there are two rotary scrapers 12, and the number of the rotary scrapers 12 is matched with the strip-shaped discharge port 15.

[0032] The fertilizer particles falling onto the upper receiving platform 2 are pushed to the ventilation outlet 11 by the rotating spiral receiving mechanism, so that the fertilizer particles fall onto the lower receiving platform 3 through the ventilation outlet 11. The lower receiving platform 3 discharges the fertilizer particles through the central ventilation hole 16 and the strip discharge port 15 through the rotating rotary scraper 12.

[0033] Example 2:

[0034] like Figure 3 As shown, the ventilation blanking port 11 is a ring-shaped structure, and a plurality of support beams 17 are provided on the ventilation blanking port 11 of the ring-shaped structure. The upper receiving platforms 2 on the inner and outer sides of the ventilation blanking port 11 of the ring-shaped structure are connected and fixed by the support beams 17; the support beams 17 provide strength for the upper receiving platforms 2 on both sides of the ventilation blanking port 11, and at the same time facilitate the passage of air intake.

[0035] The angle a between the lower receiving platform 3 and the horizontal plane is 5-10°, preferably 7°. A protective ventilation net 18 is installed between the lower receiving platform 3 and the upper receiving platform 2 outside the ventilation opening 11. The bucket-shaped lower receiving platform 3 facilitates the flow of fertilizer particles. The protective ventilation net 18 is installed below the annular ventilation opening 11 to prevent falling fertilizer particles from scattering outside the lower receiving platform 3 and facilitate ventilation of the tower. Other configurations are the same as in Example 1.

[0036] Example 3:

[0037] like Figure 1 and Figure 2As shown, the spiral material collection mechanism includes a central rotor 6, which is mounted in the middle of the upper material collection platform 2. A main beam 7 is provided above the upper material collection platform 2, and the main beam 7 is rotatably mounted on the central rotor 6. A rotating carriage 10 is provided between each end of the main beam 7 and the upper material collection platform 2. A carriage track 13 is provided on the upper material collection platform 2 to cooperate with the rotating carriage 10. A material retaining ring 19 is provided on the inner side of the rotating carriage 10. A spiral conveyor 8 and a beam scraper 20 are provided at one or both ends of the bottom of the main beam 7. The spiral conveyor 8 is provided between the material retaining ring 19 and the outer periphery of the ventilation and blanking port 11, and the beam scraper 20 is provided between the outer periphery of the ventilation and blanking port 11 and the middle of the upper material collection platform 2. During production, the upper material collection platform 2 inside the ventilation and blanking port 11 has a truncated cone structure, and a central rotor mounting hole 14 is provided at the center. The central rotor 6 is mounted in the central rotor mounting hole 14. Other aspects are the same as those in Example 2. The rotating carriage 10 and the spiral conveyor 8 are conventional technology.

[0038] Example 4:

[0039] The embodiment further comprises a tower 1, an upper material receiving platform 2 connected to the inner wall of the tower 1, tower bottom material receiving devices 9 respectively provided at both ends of a main beam 7 and adapted to engage with the inner wall of the tower 1, an air inlet 21 provided on the tower 1 at the bottom of the upper material receiving platform 2, and a belt conveyor 4 provided at the bottom of the lower material receiving platform 3 and adapted to engage with the central ventilation hole 16. The remainder of the embodiment is the same as in Example 3.

[0040] During the manufacturing process of this embodiment, the tower 1 at the bottom of the upper receiving platform 2 is supported and fixed by support beams 17, that is, the bottom of the tower 1 is a hollow structure to facilitate air intake. During installation, the two sides of the lower receiving platform 3 can be fixedly connected to the inner wall of the tower 1, or the lower receiving platform 3 can be fixedly connected to the upper receiving platform 2 by support beams.

[0041] Example 5:

[0042] The round particle high-tower granulation method includes the above-mentioned double-layer ventilation and collecting device, and the specific steps are as follows:

[0043] Step 1: Start the exhaust device at the top of the tower 1 to continuously allow air to flow from the bottom of the tower 1 to the top of the tower 1;

[0044] Step 2: After the fertilizer raw materials and the filler are fully mixed and heated to melt, a fertilizer slurry is obtained, and the fertilizer slurry is sprayed downward in the tower 1 through the granulation nozzle at the top of the tower 1;

[0045] Step 3: During the falling process, the fertilizer slurry is fully exposed to the air introduced from the bottom of the tower 1, which accelerates the cooling of the fertilizer particles. At the same time, the upward air offsets part of the gravity of the fertilizer slurry during its falling, so that the condensed fertilizer particles change from a raindrop-shaped structure to a spherical structure, thereby improving the strength and surface smoothness of the fertilizer particles.

[0046] Step 4: The fertilizer particles obtained in step 3 first fall into the upper receiving platform 2, and the spiral collecting mechanism is started. The spiral collecting mechanism discharges the fertilizer particles falling on the upper receiving platform 2 through the ventilation discharge port 11;

[0047] In step 5, the fertilizer particles fall onto the lower receiving platform 3 through the ventilation drop port 11, and the driving mechanism is started. The driving mechanism drives the rotary scraper 12 to rotate through the slewing bearing 5, so that the fertilizer particles fall onto the belt conveyor 4 through the strip discharge port 15, and are finally transported to the next process by the belt conveyor 4.

[0048] When the double-layer ventilation and collecting device is manufactured, the vertical distance between the upper collecting platform 2 and the bottom of the tower 1 is 6-8 meters; the vertical distance between the upper collecting platform 2 and the lower collecting platform 3 is 3-5 meters; the diameter of the central ventilation hole 16 is 2-3 meters; the outer diameter of the annular ventilation blanking port 11 is 16-20 meters, and the inner diameter of the annular ventilation blanking port 11 is 10-15 meters.

Claims

1. A double-layer ventilation material collecting device, characterized in that: The invention comprises an upper material receiving platform (2), the upper material receiving platform (2) is provided with a ventilation material discharge port (11) and a spiral material receiving mechanism matched with the ventilation material discharge port (11), a lower material receiving platform (3) is provided at the bottom of the upper material receiving platform (2), a strip material discharge port (15) is provided on the lower material receiving platform (3), a central ventilation hole (16) is provided in the middle of the lower material receiving platform (3), a slewing bearing (5) is provided at the central ventilation hole (16), a fixed ring of the slewing bearing (5) is fixedly connected with the lower material receiving platform (3), the slewing ring of the slewing bearing (5) is matched with the output end of the driving mechanism, and one or more slewing scrapers (12) matched with the upper surface of the lower material receiving platform (3) are provided on the slewing ring of the slewing bearing (5); The ventilation opening (11) is an annular structure, and the ventilation opening (11) is staggered with the central ventilation hole (16) in the vertical direction.

2. The double-layer ventilation material collecting device according to claim 1 is characterized in that: The ventilation blanking opening (11) is provided with a plurality of support beams (17), and the upper material receiving platforms (2) on both sides of the inner and outer sides of the annular ventilation blanking opening (11) are connected and fixed via the support beams (17).

3. The double-layer ventilation and collecting device according to claim 1 is characterized in that: The angle a between the lower material receiving platform (3) and the horizontal plane is 5-10 degrees, and a protective ventilation net (18) is provided between the lower material receiving platform (3) and the upper material receiving platform (2) outside the ventilation blanking port (11).

4. The double-layer ventilation material collecting device according to claim 1, characterized in that: The spiral material receiving mechanism comprises a central rotor (6), the central rotor (6) being mounted on the middle of an upper material receiving platform (2), a main beam (7) being arranged above the upper material receiving platform (2), the main beam (7) being rotatably mounted on the central rotor (6), a rotating carriage (10) being arranged between the two ends of the main beam (7) and the upper material receiving platform (2), a carriage track (13) being arranged on the upper material receiving platform (2) and cooperating with the rotating carriage (10), a material blocking ring (19) being arranged on the inner side of the rotating carriage (10), a spiral conveyor (8) and a beam scraper (20) being arranged at one end or both ends of the bottom of the main beam (7), the spiral conveyor (8) being arranged between the material blocking ring (19) and the periphery of a ventilation and blanking port (11), and the beam scraper (20) being arranged between the periphery of the ventilation and blanking port (11) and the middle of the upper material receiving platform (2).

5. The double-layer ventilation and collecting device according to any one of claims 1 to 4, characterized in that: The invention also comprises a high tower (1), an upper material receiving platform (2) connected to the inner wall of the high tower (1), tower bottom material receiving devices (9) cooperating with the inner wall of the high tower (1) are respectively provided at both ends of the main beam (7), an air inlet (21) is provided on the high tower (1) at the bottom of the upper material receiving platform (2), and a belt output machine (4) cooperating with the central ventilation hole (16) is provided at the bottom of the lower material receiving platform (3).

6. The double-layer ventilation material collecting device according to claim 5, characterized in that: The high tower (1) at the bottom of the upper material receiving platform (2) is supported and fixed by a support beam (17).

7. A round particle high tower granulation method, characterized in that: The double-layer ventilation and collecting device according to claim 5 is provided, and the specific steps are as follows: Step 1, starting the exhaust device at the top of the high tower (1) so that air continuously flows from the bottom of the high tower (1) to the top of the high tower (1); Step 2, after the fertilizer raw material and the filler are fully mixed and heated to melt, a fertilizer slurry is obtained, and the fertilizer slurry is sprayed downward through a granulation nozzle at the top of the high tower (1); Step 3, during the falling process, the fertilizer slurry is fully in contact with the air introduced from the bottom of the high tower (1), and the air blowing upward offsets part of the gravity of the fertilizer slurry when it falls, so that the condensed fertilizer particles change from a raindrop-shaped structure to a spherical structure; Step 4, the fertilizer particles obtained in step 3 first fall into the upper receiving platform (2), and the spiral receiving mechanism is started, and the spiral receiving mechanism discharges the fertilizer particles falling on the upper receiving platform (2) through the ventilation drop port (11); In step 5, the fertilizer particles fall onto the lower receiving platform (3) through the ventilation drop port (11), and the driving mechanism is started. The driving mechanism drives the rotary scraper (12) to rotate through the slewing bearing (5), so that the fertilizer particles fall onto the belt delivery machine (4) through the strip discharge port (15), and are finally transported to the next process by the belt delivery machine (4).

8. The round particle high tower granulation method according to claim 7, characterized in that: The vertical distance between the upper material receiving platform (2) and the bottom of the high tower (1) is 6-8 meters.

9. The round particle high tower granulation method according to claim 7, characterized in that: The vertical distance between the upper material receiving platform (2) and the lower material receiving platform (3) is 3-5 meters.

10. The round particle high tower granulation method according to claim 7, characterized in that: The diameter of the central ventilation hole (16) is 2-3 meters; the outer diameter of the annular ventilation opening (11) is 16-20 meters, and the inner diameter of the annular ventilation opening (11) is 10-15 meters.

Images