A drying device for rotating air-blowing fertilizer particles

Abstract

The invention discloses a drying device for turning over air-blowing fertilizer particles, which belongs to the field of fertilizer drying and processing equipment. A multi-partition drum rack is added in a drying box, and the multi-partition drum rack is composed of a plurality of pairs of mutually connected air-permeable ring drums. During drying, a proper amount of fertilizer particles are introduced into each pair of air-permeable ring drums through a feed nozzle. During the cyclic turning movement of the plurality of pairs of air-permeable ring drums, the fertilizer particles are turned over and scattered in the plurality of pairs of connected air-permeable ring drums to a large extent, thereby effectively avoiding the fertilizer particles from sticking to the wall. At the same time, an air distribution piece is arranged on each air-permeable ring drum. When the air-permeable ring drum rotates to the top, the hot air flow ejected from the air supply port is introduced into a pair of jet rings through the air inlet port, and is diffused by a plurality of jet splits on the jet ring. After the air flow scours the inner end wall of the air ring drum, it is easy to blow off some fertilizer particles that are difficult to separate from the inner wall of the air-permeable ring drum in the turning state, thereby further improving the drying effect of the fertilizer particles and avoiding local over-drying.

Description

Technical Field

[0001] The invention relates to the field of fertilizer drying and processing equipment, and more specifically to a drying equipment for tumbling air-blowing fertilizer particles. Background Art

[0002] After the granulation process is completed, the fertilizer granules have a high humidity and need to be dried. In the prior art, a rotary drum dryer is generally used to dry the fertilizer granules. The existing rotary drum dryer is simply composed of a rotary drum, a rotating motor and a heater. The heater heats the rotary drum to achieve fertilizer drying.

[0003] When the amount of fertilizer to be dried at one time is large, most of the fertilizer particles tend to accumulate at the bottom of the drum and are difficult to turn over with the drum. In addition, since the fertilizer particles have a certain humidity before drying and have a certain stickiness between them, they are more likely to adhere to the wall of the drum when the amount is large. The fertilizer particles adhered to the drum wall are prone to over-drying, resulting in poor drying uniformity.

[0004] To this end, we propose a drying device for tumbling air-blown fertilizer particles to effectively solve some problems existing in the prior art. Summary of the invention

[0005] 1. Technical problems to be solved

[0006] In view of the problems existing in the prior art, the purpose of the present invention is to provide a drying equipment for rotating air-blowing fertilizer particles. By adding a multi-partitioned drum rack in a drying box, during drying, an appropriate amount of fertilizer particles are introduced into each pair of air-permeable ring cylinders through a feed nozzle. During the cyclic rotating movement of the multiple pairs of air-permeable ring cylinders, the fertilizer particles are greatly turned over and scattered in the multiple pairs of connected air-permeable ring cylinders, thereby effectively preventing the fertilizer particles from sticking to the wall. At the same time, an air distribution part is arranged on each air-permeable ring cylinder. When the air-permeable ring cylinder rotates to the top, the hot air flow ejected from the air supply port is introduced into a pair of jet rings through the air inlet, and is diffused by multiple jet diversions on the jet ring. After the air flow flushes the inner end wall of the air ring cylinder, it is easy to blow off some fertilizer particles that are difficult to separate from the inner wall of the air-permeable ring cylinder when turned over, thereby further improving the drying effect of the fertilizer particles.

[0007] 2. Technical solution

[0008] To solve the above problems, the present invention adopts the following technical solutions.

[0009] A drying device for tumbling air-blowing fertilizer particles comprises a drying box, wherein a multi-zone drum rack is rotatably connected between the opposite inner walls of the drying box, the multi-zone drum rack comprises a pair of connecting pipes, a plurality of annularly distributed air-permeable ring drums are arranged between the pair of connecting pipes, the two ends of the plurality of air-permeable ring drums are respectively connected to the pair of connecting pipes, the outer ends of the pair of connecting pipes are rotatably installed on the opposite inner walls of the drying box by rotating shafts, a driving motor connected to one of the rotating shafts is fixedly installed on the outer end wall of the drying box, the plurality of air-permeable ring drums are respectively connected in pairs at 180° symmetry, and each pair of air-permeable ring drums is provided with a feeding nozzle, and each air-permeable ring drum is embedded and installed at the port where it is connected to the connecting pipe. A material guide hopper and two symmetrically arranged material guide hoppers are connected by a material guide pipe. A heating box is arranged on the outside of the drying box. A warm air duct connected to the heating box is arranged on the top of the drying box. The warm air duct is located directly above the multi-partition tube rack. A plurality of downwardly arranged air supply ports are distributed on the lower end wall of the warm air duct. An air intake plate is arranged on the outer side wall of the middle part of each air permeable ring tube. An air intake port corresponding to the position of one of the air supply ports is arranged on the air intake plate. The inner end wall of the air intake plate is embedded in the inner side of the air permeable ring tube and is connected to an air distribution piece connected to the air inlet. The air distribution piece includes a conducting plate fitted to the inner end wall of the air intake plate. Jet rings are connected to the left and right ends of the conducting plate, and the conducting plate is connected to the jet ring.

[0010] Furthermore, each of the air-permeable ring tubes is in a curved semi-annular structure, and a plurality of air-permeable micropores are provided on the side walls at both ends of each of the air-permeable ring tubes.

[0011] Furthermore, the plurality of air-permeable ring cylinders and the connecting pipes are made of heat-conducting materials, the drying box is made of heat-insulating materials, and the aperture of the air-permeable micropores is smaller than that of the fertilizer particles.

[0012] Furthermore, the plurality of material guide hoppers are all conical funnel-shaped structures, and the small end portions of a pair of symmetrically arranged material guide hoppers are both connected to a connecting piece sleeved on the material guide pipe.

[0013] Furthermore, the multiple material guide pipes located on one side of each connecting pipe are staggered, and both ends of the inner material guide pipes are connected to a pair of small ports of the material guide hoppers. The multiple material guide pipes can be staggeredly installed inside the connecting pipe without affecting the circulation.

[0014] Furthermore, a drawing pipe is connected to the outer end wall of the drying box away from the driving motor. The drawing pipe is connected to the rotating shaft and the connecting pipe corresponding to its position, and a plurality of material guide pipes arranged close to the side of the drawing pipe are equipped with solenoid valves. When drying is completed, the drawing pipe is connected to an external pump, and the solenoid valve on the material guide pipe is opened to realize the extraction of fertilizer particles in the plurality of air-permeable ring cylinders.

[0015] Furthermore, the outer diameter of each jet ring is smaller than the inner diameter of the air-permeable ring tube, and a plurality of jet microholes are distributed on the end wall of each jet ring.

[0016] Furthermore, a plurality of air inlets are installed on the air inlet sheet, and an air path one-way valve is installed inside the air inlet.

[0017] Furthermore, an anti-stick coating is attached to the inner wall of each air-permeable ring tube, and an anti-air permeability membrane is detachably coated on the outer end wall of the air-permeable ring tube corresponding to the position of the air-permeable micropores.

[0018] Furthermore, a heater and a circulating pump are installed inside the heating box. The air inlet and outlet of the circulating pump are respectively provided with an outlet pipe and an air inlet pipe. The end of the outlet pipe away from the circulating pump extends to the interior, and the end of the air inlet pipe away from the circulating pump passes through the drying box and is connected to the warm air pipe, thereby realizing the circulation of hot air in the drying box. The flowing airflow can more easily improve the drying effect.

[0019] 3. Beneficial effects

[0020] Compared with the prior art, the advantages of the present invention are:

[0021] (1) This scheme adds a multi-partitioned drum rack in the drying box. The multi-partitioned drum rack is composed of multiple pairs of interconnected air-permeable ring drums. During drying, an appropriate amount of fertilizer particles are introduced into each pair of air-permeable ring drums through a feed nozzle. During the cyclic flipping movement of the multiple pairs of air-permeable ring drums, the fertilizer particles are flipped and scattered in the multiple pairs of interconnected air-permeable ring drums, thereby effectively preventing the fertilizer particles from sticking to the wall. At the same time, an air distribution member is arranged on each air-permeable ring drum. When the air-permeable ring drum rotates to the top, the hot air flow ejected from the air supply port is introduced into a pair of jet rings through the air inlet, and is diffused by multiple jet splitters on the jet ring. After the air flow flushes the inner end wall of the air ring drum, it is easy to blow off some fertilizer particles that are difficult to separate from the inner wall of the air-permeable ring drum when flipped, thereby further improving the drying effect of the fertilizer particles and avoiding local over-drying.

[0022] (2) Each air-permeable ring tube has a curved semi-circular structure, and a plurality of air-permeable micropores are provided on the side walls at both ends of each air-permeable ring tube. The aperture of the air-permeable micropores is smaller than the fertilizer particles. The curved semi-circular structure is arranged to facilitate the large-scale flipping of the fertilizer particles when the air-permeable ring tube is rotated up and down. The air-permeable micropores are arranged at the ends of the air-permeable ring tube, which facilitates the gas circulation inside and outside the air-permeable ring tube. The air flow and the fertilizer particles in the flipping process impact each other, thereby effectively improving the drying efficiency of the fertilizer particles.

[0023] (3) The multiple material guide hoppers are all conical funnel-shaped structures. The small ports of a pair of symmetrically arranged material guide hoppers are connected to connecting pieces sleeved on the material guide pipes. The multiple material guide pipes located on one side of each connecting pipe are staggered, and both ends of each material guide pipe are connected to the small ports of a pair of material guide hoppers. The multiple material guide pipes can be staggeredly installed on the inner side of the connecting pipe without affecting the circulation. When the multi-partition cylinder rack flips, the fertilizer particles can circulate with each other in a pair of symmetrically arranged air-permeable ring cylinders, thereby realizing a large-scale upside-down flipping of the fertilizer particles.

[0024] (4) There are multiple air inlets installed on the air inlet sheet, and an air path one-way valve is installed inside the air inlet. The outer diameter of each jet ring is smaller than the inner diameter of the air permeable ring tube, and a plurality of jet micropores are distributed on the end wall of each jet ring. When one of the air permeable ring tubes rotates to the top, the hot air flow ejected from the air supply port is ejected straight downward, and is easily introduced into a pair of jet rings through the air inlet, and is diffused by the multiple jet diversions on the jet ring. Since the jet micropores on the jet ring are arranged close to the inner wall of the air permeable ring tube, the air flow flows along the inner end wall of the air permeable ring tube, and it is easy to blow off some fertilizer particles adhering to the inner end wall of the air permeable ring tube.

[0025] (5) The outer end wall of the air-permeable ring cylinder corresponding to the position of the air-permeable micropores is detachably covered with an anti-air permeability membrane. The outer end wall of the drying box away from the driving motor is connected with a pumping pipe. The pumping pipe is connected to the rotating shaft and the connecting pipe corresponding to its position, and a plurality of material guide pipes arranged near one side of the pumping pipe are installed with electromagnetic valves. When drying is completed, the pumping pipe is connected to an external pump, and the electromagnetic valve on the material guide pipe is opened to realize the extraction of fertilizer particles in the plurality of air-permeable ring cylinders. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is an internal perspective view of the present invention;

[0027] Figure 2 It is a structural schematic diagram of the present invention;

[0028] Figure 3 The structure of the multi-zone drum rack of the present invention is shown in FIG. Figure 1 ;

[0029] Figure 4 The structure of the multi-zone drum rack of the present invention is shown in FIG. Figure 2 ;

[0030] Figure 5 It is a schematic diagram of the interior of the multi-partition cartridge rack of the present invention;

[0031] Figure 6 It is a cross-sectional view of the joint of a pair of air-permeable ring tubes and a connecting pipe of the present invention;

[0032] Figure 7A cross-sectional view of a multi-partition cartridge rack of the present invention;

[0033] Figure 8 It is a schematic structural diagram of the joint between the air intake plate and the air distribution member of the present invention;

[0034] Fig. 9 It is a cross-sectional view of the multi-partition cartridge holder of the present invention when in operation;

[0035] Fig.10 It is a cross-sectional view of the multi-partition cartridge rack of the present invention when extracting fertilizer particles.

[0036] Description of the numbers in the figure:

[0037] 1 drying box, 2 connecting pipe, 3 air ring cylinder, 301 feed nozzle, 4 guide hopper, 5 guide pipe, 6 air inlet plate, 7 air inlet, 8 guide plate, 9 jet ring, 10 rotating shaft, 11 heating box, 12 warm air pipe, 13 air supply port. DETAILED DESCRIPTION

[0038] The following will combine the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all the embodiments. All other embodiments obtained by ordinary technicians in this field without creative work based on the embodiments of the present invention belong to the scope of protection of the present invention.

[0039] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0040] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "mounted / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] Embodiment 1:

[0042] See also Figure 1-4A drying device for tumbling air-blowing fertilizer particles, comprising a drying box 1, a multi-partition drum rack is rotatably connected between the opposite inner walls of the drying box 1, the multi-partition drum rack comprises a pair of connecting pipes 2, a plurality of annularly distributed air-permeable ring drums 3 are arranged between the pair of connecting pipes 2, the two ends of the plurality of air-permeable ring drums 3 are respectively connected to the pair of connecting pipes 2, the outer ends of the pair of connecting pipes 2 are rotatably installed on the opposite inner walls of the drying box 1 by rotating shafts 10, a driving motor connected to one of the rotating shafts 10 is fixedly installed on the outer end wall of the drying box 1, the plurality of air-permeable ring drums 3 are respectively connected in pairs by 180° symmetry, and a feeding nozzle 301 is provided on each pair of air-permeable ring drums 3;

[0043] See also Figure 4-7 A guide hopper 4 is embedded and installed at the port where each air-permeable ring tube 3 is connected to the connecting pipe 2. A feed nozzle 301 is arranged above the guide hopper 4. The fertilizer particles introduced through the feed nozzle 301 are introduced into a pair of air-permeable ring tubes 3 that are connected to each other through the guide hopper 4. The amount of fertilizer particles introduced depends on the volume of the pair of air-permeable ring tubes 3. A pair of air-permeable ring tubes 3 are reserved with a turning space for fertilizer particles. The two symmetrically arranged guide hoppers 4 are connected to each other through a guide pipe 5. The multiple guide hoppers 4 are all conical funnel-shaped structures. The small ports of the symmetrically arranged pair of guide hoppers 4 are connected There is a connecting piece sleeved on the guide tube 5, and multiple guide tubes 5 located on one side of each connecting tube 2 are staggered, and both ends of each guide tube 5 are connected to the small ports of a pair of guide hoppers 4. The multiple guide tubes 5 can be staggeredly installed on the inner side of the connecting tube 2 without affecting the circulation, so that a pair of symmetrically distributed air-permeable ring cylinders 3 can be connected to each other, which is easy for the fertilizer particles to circulate in the pair of air-permeable ring cylinders 3. When the multi-partition cylinder rack flips, the fertilizer particles can circulate in the pair of symmetrically arranged air-permeable ring cylinders 3, so that the fertilizer particles can be flipped up and down in a large range.

[0044] See also Figure 1-2 A heating box 11 is provided on the outside of the drying box 1, and a warm air duct 12 connected to the heating box 11 is provided on the top of the drying box 1. The warm air duct 12 is located just above the multi-partition tube rack, and a plurality of downwardly arranged air supply ports 13 are distributed on the lower end wall of the warm air duct 12. A heater and a circulating pump are installed inside the heating box 11, and an air outlet pipe and an air inlet pipe are respectively provided at the air inlet and air outlet of the circulating pump. The end of the air outlet pipe away from the circulating pump extends to the inside, and the end of the air inlet pipe away from the circulating pump passes through the drying box 1 and is connected to the warm air duct 12, so that the circulation of hot air in the drying box 1 is realized, and the flowing airflow is easier to improve the drying effect.

[0045] See also Figure 7-9Each air-permeable ring tube 3 is in a curved semi-annular structure, and a plurality of air-permeable micropores are provided on the side walls at both ends of each air-permeable ring tube 3, which are arranged in a curved semi-annular structure, so that it is easy to drive the fertilizer particles to flip significantly when rotating up and down. Air-permeable micropores are provided at the ends of the air-permeable ring tube 3, so that it is easy to improve the gas circulation inside and outside the air-permeable ring tube 3. The plurality of air-permeable ring tubes 3 and the connecting pipe 2 are made of heat-conducting materials, and the drying box 1 is made of heat-insulating materials. The aperture of the air-permeable micropores is smaller than the fertilizer particles.

[0046] An air inlet sheet 6 is provided on the outer wall of the middle part of each air permeable ring tube 3, and an air inlet port 7 corresponding to the position of one of the air supply ports 13 is provided on the air inlet sheet 6. The inner end wall of the air inlet sheet 6 is embedded in the inner side of the air permeable ring tube 3 and is connected to an air distribution piece connected to the air inlet port 7. The air distribution piece includes a conductive sheet 8 attached to the inner end wall of the air inlet sheet 6, and the left and right ends of the conductive sheet 8 are connected to a jet ring 9, and the conductive sheet 8 is connected to the jet ring 9.

[0047] Specifically, the outer diameter of each jet ring 9 is smaller than the inner diameter of the air-permeable ring tube 3, and a plurality of jet micropores are distributed on the end wall of each jet ring 9. When one of the air-permeable ring tubes 3 rotates to the top, at this time, the hot air flow ejected from the air supply port 13 is ejected straight downward, and is easily introduced into a pair of jet rings 9 through the air inlet 7, and is diffused by the multiple jets on the jet ring 9. Since the jet micropores on the jet ring 9 are arranged close to the inner wall of the air-permeable ring tube 3, the air flow flows along the inner end wall of the air-permeable ring tube 3, and it is easy to blow off some fertilizer particles adhering to the inner end wall of the air-permeable ring tube 3, and during the flipping process of the air-permeable ring tube 3 To further shake off the fertilizer particles, there are multiple air inlets 7 installed on the air inlet sheet 6, and an air path one-way valve is installed inside the air inlet 7. When the intelligent control drive motor rotates, the technician can achieve a certain residence time every time the air permeable ring tube 3 rotates to the top, so that the airflow ejected downward through the air supply port 13 can be introduced into a pair of jet rings 9 through the air inlet 7, so that a certain amount of airflow can blow off the fertilizer particles adhered to the inner end wall of the air permeable ring tube 3. An anti-stick coating is attached to the inner wall of each air permeable ring tube 3, which further effectively reduces the adhesion of fertilizer particles.

[0048] See also Fig.10It should be added here that the outer end wall of the air-permeable ring cylinder 3 corresponding to the position of the air-permeable micropores is detachably covered with an anti-air permeability membrane, and the outer end wall of the drying box 1 away from the driving motor is connected with a suction pipe, and the suction pipe is connected to the rotating shaft 10 and the connecting pipe 2 corresponding to its position, and a solenoid valve is installed on a plurality of guide pipes 5 arranged near one side of the suction pipe. When drying is completed, a plurality of anti-air permeability membranes are attached to the outer end wall of the air-permeable ring cylinder 3, and the two can be connected by an existing fixing method, which will not be elaborated here, and then the suction pipe is connected to an external suction pump, and the solenoid valve on the guide pipe 5 is opened to realize the extraction of fertilizer particles in a plurality of air-permeable ring cylinders 3. In addition, those skilled in the art can also directly connect the external suction pump to a plurality of feed nozzles 301 in sequence to realize the extraction of fertilizer particles in a plurality of pairs of air-permeable ring cylinders 3.

[0049] Compared with the drying equipment for fertilizer particles in the prior art, the present device adds a multi-partition drum rack in the drying box 1. The multi-partition drum rack is composed of multiple pairs of mutually connected air-permeable ring drums 3. The air-permeable ring drums 3 are provided with air-permeable micropores, which facilitate the circulation of hot air inside and outside. During drying, an appropriate amount of fertilizer particles are introduced into each pair of air-permeable ring drums 3 through the feed nozzle 301. The multiple pairs of air-permeable ring drums 3 are cyclically turned over in cooperation with the driving motor, so that the fertilizer particles are turned over and scattered in a pair of connected air-permeable ring drums 3 to a large extent, thereby effectively preventing the fertilizer particles from sticking to the wall due to the small movement amplitude. At the same time, an air distribution piece is arranged on each air-permeable ring tube 3. When one of the air-permeable ring tubes 3 rotates to the top, the hot air flow ejected from the air supply port 13 is ejected straight downward, and is easily introduced into a pair of jet rings 9 through the air inlet 7, and is diffused by multiple jet diversions on the jet rings 9. Since the jet micropores on the jet rings 9 are arranged close to the inner wall of the air-permeable ring tube 3, the air flow flows along the inner end wall of the air-permeable ring tube 3, and it is easy to blow off some fertilizer particles that are difficult to separate from the inner wall of the air-permeable ring tube 3 when it is turned over, thereby further improving the drying effect of the fertilizer particles and avoiding local over-drying.

[0050] The components used in the present invention are all universal standard parts or components known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.

[0051] The above is only a preferred specific implementation manner of the present invention; but the protection scope of the present invention is not limited thereto; any technician familiar with the technical field within the technical scope disclosed by the present invention; any equivalent replacement or change based on the technical solution and improved concept of the present invention shall be covered by the protection scope of the present invention.

Claims

1. A drying device for tumbling air-blown fertilizer granules, comprising a drying box (1), characterized in that: A multi-zone drum rack is rotatably connected between the opposite inner walls of the drying box (1), and the multi-zone drum rack comprises a pair of connecting pipes (2). A plurality of annularly distributed air-permeable ring drums (3) are arranged between the pair of connecting pipes (2). The two ends of the plurality of air-permeable ring drums (3) are respectively connected to the pair of connecting pipes (2). Each of the air-permeable ring drums (3) is in a curved semi-annular structure, and a plurality of air-permeable micropores are provided on the side walls at the two ends of each air-permeable ring drum (3). The outer ends of the pair of connecting pipes (2) are connected by a rotating shaft (10). Rotatably mounted on the opposite inner wall of the drying box (1), a driving motor connected to one of the rotating shafts (10) is fixedly mounted on the outer end wall of the drying box (1), a plurality of the air-permeable ring cylinders (3) are symmetrically connected in pairs at 180 degrees, and each pair of air-permeable ring cylinders (3) is provided with a feed nozzle (301), and a guide hopper (4) is embedded and installed at the port where each air-permeable ring cylinder (3) is connected to the connecting pipe (2), and the two symmetrically arranged guide hoppers (4) are connected to each other through a guide pipe (5); A heating box (11) is provided outside the drying box (1), a warm air pipe (12) connected to the heating box (11) is provided at the top of the drying box (1), the warm air pipe (12) is located directly above the multi-zoned drum rack, and a plurality of downwardly disposed air supply ports (13) are distributed on the lower end wall of the warm air pipe (12); An air inlet sheet (6) is provided on the outer wall of the middle part of each of the air permeable ring tubes (3), and an air inlet port (7) corresponding to the position of one of the air supply ports (13) is provided on the air inlet sheet (6); the inner end wall of the air inlet sheet (6) is embedded in the inner side of the air permeable ring tube (3) and is connected to an air distribution member connected to the air inlet port (7); the air distribution member includes a conductive sheet (8) attached to the inner end wall of the air inlet sheet (6), and the left and right ends of the conductive sheet (8) are connected to a jet ring (9), and the conductive sheet (8) and the jet ring (9) are arranged in communication; The plurality of material guide hoppers (4) are all of a conical funnel-shaped structure, and the small ports of a pair of symmetrically arranged material guide hoppers (4) are connected to a connecting piece sleeved on the material guide pipe (5), and the plurality of material guide pipes (5) close to the same connecting pipe (2) are staggeredly distributed, and both ends of each material guide pipe (5) are connected to the small ports of a pair of material guide hoppers (4); The outer diameter of each of the jet rings (9) is smaller than the inner diameter of the air-permeable ring tube (3), and a plurality of jet micropores are distributed on the end wall of each of the jet rings (9). A plurality of air inlets (7) are installed on the air inlet sheet (6), and an air path one-way valve is installed inside the air inlet (7).

2. The tumbling air-blowing fertilizer granule drying device according to claim 1 is characterized in that: The plurality of air-permeable ring cylinders (3) and the connecting pipe (2) are all made of heat-conducting material, the drying box (1) is made of heat-insulating material, and the aperture of the air-permeable micropores is smaller than that of the fertilizer particles.

3. The drying device for tumbling air-blowing fertilizer granules according to claim 1 is characterized in that: A material extraction pipe is connected to the outer end wall of the drying box (1) on the side away from the driving motor. The material extraction pipe is connected to the rotating shaft (10) and the connecting pipe (2) corresponding to the position thereof, and a plurality of material guide pipes (5) arranged close to the side of the material extraction pipe are equipped with electromagnetic valves.

4. The tumbling air-blowing fertilizer granule drying device according to claim 1 is characterized in that: An anti-stick coating is attached to the inner wall of each of the air-permeable ring cylinders (3).

5. The tumbling air-blowing fertilizer granule drying device according to claim 1 is characterized in that: A heater and a circulation pump are installed inside the heating box (11); the air inlet and air outlet of the circulation pump are provided with an air outlet pipe and an air inlet pipe respectively; the end of the air outlet pipe away from the circulation pump extends into the drying box (1); the end of the air inlet pipe away from the circulation pump passes through the drying box (1) and is connected to the warm air pipe (12).

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