Multi-stage rotary drum granulator

Abstract

The utility model relates to the technical field of compound fertilizer production and processing, and discloses a multi-stage drum granulator which comprises a base, and the bottom of the base is hollowed out; the protective shell is arranged at the upper end of the base, the protective shell is fixedly connected with the base, and one end of the protective shell is fixedly connected with a feeding port; the granulation assembly is arranged in the protective shell, the granulation assembly is used for screening while granulation, the granulation assembly comprises mounting frames, a connecting pipe and a rotary drum barrel, the mounting frames are symmetrically arranged on the protective shell and fixedly connected with the protective shell, and after granulation, the fertilizer is driven by the auger to move towards the direction of the second discharge port; the small-size fertilizer falls to the opening of the protective shell through the holes in the rotary drum and is discharged through the first discharge port, and the large-size fertilizer is discharged from the second discharge port under the driving of the auger, so that secondary screening of waste particles by virtue of a screening machine is avoided, the production steps are reduced, and the production cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of compound fertilizer production and processing, and specifically relates to a multi-stage drum granulator. Background Art

[0002] A rotary drum granulator is a machine that shapes materials into specific shapes. A key piece of equipment in the compound fertilizer industry, it's suitable for both cold and hot granulation, as well as large-scale production of high-, medium-, and low-concentration compound fertilizers. Its primary operating method is wet granulation, where a certain amount of water or steam is used to condition the base fertilizer within the drum, allowing it to undergo a full chemical reaction. Under certain liquid phase conditions, the drum's rotation creates a squeezing force between the material particles, causing them to agglomerate into balls.

[0003] A search of the document with publication number (CN220091298U) discloses a multi-stage drum granulator for organic fertilizer, relating to the field of fertilizer processing equipment. This utility model cascades a primary drum with at least one cascade drum to form a coaxial fertilizer-forming drum. During the fertilizer-forming process, the primary drum and the cascade drums at different cascade levels produce different forming conditions. The primary drum and each cascade drum are each connected to an independent drum drive mechanism, which includes a gear ring disposed on the primary drum and the cascade drums, a drive gear meshing with the gear ring, a reduction gear connected to the drive gear, and a variable-speed motor.

[0004] The device is provided with independent drum drive mechanisms for the first-stage drum and each cascade drum, which provide different rotation conditions according to the fertilizer forming conditions to improve the fertilizer granulation rate.

[0005] However, in actual use, the above device granulates the fertilizer and discharges it from the same discharge port. At this time, the fertilizer particles are of different sizes, and the waste particles need to be screened twice with the help of a screening machine, which increases the production steps and increases the production cost.

[0006] In view of this, the present utility model is proposed. Utility Model Content

[0007] In order to solve the technical problem of secondary screening of fertilizer particles, the basic idea of ​​the technical solution adopted by the utility model is:

[0008] A multi-stage rotary drum granulator comprises a base with a hollow bottom; a protective shell, which is arranged at the upper end of the base and fixedly connected to the base, and a feed port is fixedly connected to one end of the protective shell; a granulation assembly, which is arranged in the protective shell and is used for screening while granulating. The granulation assembly comprises a mounting frame, a connecting pipe and a rotary drum, the mounting frame is symmetrically arranged on the protective shell, the mounting frame is fixedly connected to the protective shell, the connecting pipe is fixedly connected to the mounting frame, the rotary drum is arranged between the mounting frames, the rotary drum is rotatably connected to the mounting frame, and the feed port is fixedly connected to the connecting pipe at one end.

[0009] As a preferred embodiment of the present invention, the granulation assembly further includes a second discharge port, which is fixedly connected to the connecting pipe at the other end. A drive motor is installed in the mounting frame, and the output shaft of the drive motor is transmission-connected to the rotating drum.

[0010] As a preferred embodiment of the present invention, multiple groups of holes are opened in the middle of the drum. The holes are filled in the figure for the convenience of intuitive display, but in reality the holes are located at one end of the second discharge port and only occupy half of the area of ​​the drum.

[0011] As a preferred embodiment of the present invention, an auger is provided on the protective shell, both ends of the auger are rotatably connected to the protective shell, and the auger abuts against the inner wall of the rotating drum.

[0012] As a preferred embodiment of the present invention, the protective shell is provided with multiple groups of concave holes, the bottom end of the protective shell is provided with an opening, the bottom end of the opening is provided with a first discharge port, and the first discharge port is fixedly connected to the protective shell.

[0013] As a preferred embodiment of the present invention, a bracket is fixedly connected to the opening of the protective shell, the bracket is fixedly connected to the protective shell, and the bracket is annular as a whole.

[0014] As a preferred embodiment of the present invention, a plurality of connecting frames are arranged in an array on the bracket, the connecting frames are connected to the bracket via fasteners, and the connecting frames are fixedly connected to the spray pipes.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. This multi-stage drum granulator is driven by the auger to move the fertilizer toward the second discharge port after granulation. Small-sized fertilizers fall through the holes on the drum to the opening of the protective shell and are discharged through the first discharge port. Large-sized fertilizers are driven by the auger to be discharged from the second discharge port, avoiding the need for secondary screening of waste particles with the help of screening machinery, thereby reducing production steps and lowering production costs.

[0017] 2. This multi-stage drum granulator drives the drum to rotate with a driving motor, and the spray pipe sprays the treatment liquid onto the drum. The liquid enters the drum through the holes on the drum to react with the fertilizer, thereby avoiding the need for workers to hold the pipe to spray into the device, realizing automated processing and improving processing efficiency.

[0018] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In the attached figure:

[0020] Figure 1 It is a three-dimensional schematic diagram of the utility model;

[0021] Figure 2 This is a new schematic diagram of the bottom end of this utility model;

[0022] Figure 3 This is a schematic cross-sectional view of the utility model;

[0023] Figure 4 This is a schematic diagram of the internal structure of the drum of the utility model;

[0024] Figure 5 This is a schematic diagram of the structure of the bracket of the utility model.

[0025] In the figure: 1. Base; 2. Protective shell; 21. Feed port; 22. First discharge port; 23. Second discharge port; 3. Mounting frame; 31. Connecting pipe; 4. Bracket; 41. Connecting frame; 42. Spray pipe; 5. Rotating drum; 51. Auger. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention.

[0027] See also Figure 1-5A multi-stage drum granulator includes a base 1 with a hollow bottom; a protective shell 2, which is arranged at the upper end of the base 1 and is fixedly connected to the base 1, and one end of the protective shell 2 is fixedly connected to a feed port 21; a granulation assembly, which is arranged in the protective shell 2 and is used for granulation and screening at the same time, and the granulation assembly includes a mounting frame 3, a connecting pipe 31 and a drum 5, the mounting frame 3 is symmetrically arranged on the protective shell 2, the mounting frame 3 is fixedly connected to the protective shell 2, and the connecting pipe 31 is fixedly connected to the mounting frame 3 The drum 5 is arranged between the mounting frames 3, and the drum 5 is rotatably connected to the mounting frames 3. The feed port 21 is fixedly connected to the connecting pipe 31 at one end. After granulation, the fertilizer is driven by the auger 51 to move toward the second discharge port 23. Small-sized fertilizers fall through the holes on the drum 5 to the opening of the protective shell 2 and are discharged through the first discharge port 22. Large-sized fertilizers are driven by the auger 51 to be discharged from the second discharge port 23, avoiding the need for secondary screening of waste particles with the help of screening machinery, thereby reducing production steps and reducing production costs.

[0028] Among them, the granulation component also includes a second discharge port 23, the second discharge port 23 is fixedly connected to the connecting pipe 31 at the other end, a driving motor is installed in the mounting frame 3, and the output shaft of the driving motor is connected to the drum 5 for transmission, and a plurality of groups of holes are provided in the middle of the drum 5. In order to facilitate intuitive display, the holes are filled in the figure, but in reality the holes are located at one end of the second discharge port 23 and only occupy half of the area inside the drum 5. An auger 51 is provided on the protective shell 2, and both ends of the auger 51 are rotatably connected to the protective shell 2. The auger 51 abuts against the inner wall of the drum 5, and a plurality of groups of concave holes are provided on the protective shell 2. The bottom end of the protective shell 2 is provided with an opening, and the bottom end of the opening is provided with a first row of The feed port 22 and the first discharge port 22 are fixedly connected to the protective shell 2. The fertilizer enters the connecting pipe 31 from the feed port 21. The auger 51 runs to send the fertilizer into the drum 5. The driving motor drives the drum 5 to rotate. When the drum 5 rotates, the fertilizer is granulated by centrifugal force. After granulation, the fertilizer is driven by the auger 51 to move toward the second discharge port 23. Small-sized fertilizers fall through the holes on the drum 5 to the opening of the protective shell 2 and are discharged through the first discharge port 22. Large-sized fertilizers are driven by the auger 51 to be discharged from the second discharge port 23, avoiding the use of screening machinery for secondary screening of waste particles, thereby reducing production steps and reducing production costs.

[0029] Among them, a bracket 4 is fixedly connected to the opening of the protective shell 2, and the bracket 4 is fixedly connected to the protective shell 2. The bracket 4 is annular as a whole, and a plurality of groups of connecting frames 41 are arranged in an array on the bracket 4. The connecting frames 41 are connected to the bracket 4 by fasteners, and the fasteners include but are not limited to bolts. A spray pipe 42 is fixedly connected to the connecting frame 41, and the spray pipe 42 sprays the treatment liquid onto the rotating drum 5 and enters the rotating drum 5 through the holes on the rotating drum 5 to react with the fertilizer, thereby avoiding workers holding the pipe to spray into the device, realizing automated processing, and improving processing efficiency.

[0030] Working principle: Fertilizer enters the connecting pipe 31 from the feed port 21, and the auger 51 runs to deliver the fertilizer to the drum 5. The driving motor drives the drum 5 to rotate, and the spray pipe 42 sprays the treatment liquid onto the drum 5. The liquid enters the drum 5 through the holes on the drum 5 to react with the fertilizer, thereby avoiding the need for workers to hold the pipe to spray into the device, realizing automated processing and improving processing efficiency. When the drum 5 rotates, the fertilizer is granulated by centrifugal force. After granulation, the fertilizer is driven by the auger 51 to move toward the second discharge port 23. Small-sized fertilizers fall through the holes on the drum 5 to the opening of the protective shell 2 and are discharged through the first discharge port 22. Large-sized fertilizers are driven by the auger 51 to be discharged from the second discharge port 23, avoiding the use of screening machinery for secondary screening of waste particles, thereby reducing production steps and reducing production costs.

[0031] It is understood that the present invention is described by way of certain embodiments, and those skilled in the art will appreciate that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. Furthermore, under the guidance of the present invention, these features and embodiments may be modified to suit specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are intended to be protected by the present invention.

Claims

1. A multi-stage drum granulator, characterized in that: include: A base (1), wherein the bottom of the base (1) is hollowed out; A protective shell (2), the protective shell (2) is arranged on the upper end of the base (1), the protective shell (2) is fixedly connected to the base (1), and one end of the protective shell (2) is fixedly connected to the feed port (21); A granulation assembly is provided in a protective shell (2). The granulation assembly is used for granulation and screening at the same time. The granulation assembly comprises a mounting frame (3), a connecting pipe (31) and a rotary drum (5). The mounting frame (3) is symmetrically provided on the protective shell (2). The mounting frame (3) is fixedly connected to the protective shell (2). The connecting pipe (31) is fixedly connected to the mounting frame (3). The rotary drum (5) is provided between the mounting frames (3). The rotary drum (5) is rotatably connected to the mounting frame (3). The feed port (21) is fixedly connected to the connecting pipe (31) at one end.

2. The multi-stage drum granulator according to claim 1, characterized in that The granulation assembly further comprises a second discharge port (23), which is fixedly connected to the connecting pipe (31) at the other end. A driving motor is installed in the mounting frame (3), and the output shaft of the driving motor is transmission-connected to the rotating drum (5).

3. The multi-stage drum granulator according to claim 1, characterized in that The middle part of the rotating drum (5) is provided with a plurality of groups of holes. In the figure, the holes are drawn in full for the sake of intuitive display, but in reality, the holes are located at one end of the second discharge port (23) and only occupy half of the area inside the rotating drum (5).

4. The multi-stage drum granulator according to claim 1, characterized in that The protective shell (2) is provided with an auger (51), both ends of the auger (51) are rotatably connected to the protective shell (2), and the auger (51) abuts against the inner wall of the rotating drum (5).

5. The multi-stage drum granulator according to claim 1, characterized in that: The protective shell (2) is provided with a plurality of groups of concave holes. The bottom end of the protective shell (2) is provided with an opening. The bottom end of the opening is provided with a first discharge port (22). The first discharge port (22) is fixedly connected to the protective shell (2).

6. The multi-stage drum granulator according to claim 5, characterized in that: A bracket (4) is fixedly connected to the opening of the protective shell (2), the bracket (4) is fixedly connected to the protective shell (2), and the bracket (4) is annular as a whole.

7. The multi-stage drum granulator according to claim 6, characterized in that: A plurality of connecting frames (41) are arranged in an array on the bracket (4); the connecting frames (41) are connected to the bracket (4) via fasteners; and a spray pipe (42) is fixedly connected to the connecting frames (41).

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