Urea particle drying treatment system and drying method

Abstract

The urea particle drying treatment system comprises a tank body, an air inlet and an air outlet are formed in the tank body, and the air inlet communicates with a draught fan; a rotating shaft is arranged in the tank body and sleeved with a lantern ring, a stirring rod is fixedly connected to the lantern ring, and a magnetic material is arranged at the end, away from the rotating shaft, of the stirring rod; a plurality of electromagnetic mechanisms which are sequentially arranged in the circumferential direction of the rotating shaft are fixedly arranged on the tank body, and the magnetic materials are located in the magnetic field range of the electromagnetic mechanisms; the electromagnetic mechanism is connected with a reversing device; the electromagnetic mechanism is sequentially started and closed through the reversing device, force rotating around the rotating shaft is applied to the end, away from the rotating shaft, of the stirring rod through the electromagnetic mechanism and the magnetic material, so that the stirring rod is driven to rotate, the force rotating around the rotating shaft is directly applied to the stirring rod, and torsion generated when the rotating shaft drives the stirring rod to rotate is removed; and the stirring device is simple in structure, safe and efficient.

Description

Technical Field

[0001] The present invention relates to the technical field of urea processing equipment, and in particular to a urea granule drying processing system and a drying method. Background Art

[0002] Urea granules are an important nitrogen fertilizer product, which are widely used in agriculture and industry. With the continuous development of agricultural production and the continuous improvement of environmental protection requirements, the market demand for granular urea will continue to grow. Urea has a certain water absorption capacity. When the humidity of the surrounding environment is high, the water absorption of urea will be greatly enhanced. During the production process of urea, it needs to be transferred between various workstations, which will inevitably absorb a certain amount of water, thus affecting the quality of urea. In addition, wet urea is easy to agglomerate, which has a great impact on subsequent packaging and fertilization. Therefore, it is necessary to dry the urea granules after production.

[0003] The existing urea granule drying device usually blows air to the urea granules to dry the urea granules; at the same time, the urea granules are stirred by a stirring device to accelerate the drying of the urea granules; but since the urea granules are solid particles, the stirring device will encounter greater resistance when stirring; the existing stirring device usually drives the rotating shaft to rotate by a motor, and the rotating shaft stirs the urea granules through a stirring rod and a stirring arm; according to the lever principle, when the stirring arm of the stirring rod is subject to resistance, the transmission of the rotating shaft and the stirring rod requires a greater torque to drive the stirring arm of the stirring rod to rotate, so the stirring device is prone to breakage under the action of the torque, resulting in the urea granules cannot be effectively stirred, affecting the drying of the urea granules; and the transmission mechanisms such as the rotating shaft and the stirring rod of the existing stirring device are fixedly connected. During the stirring process, when the stirring blade is subject to greater resistance, the torque of the transmission mechanisms such as the rotating shaft and the stirring rod continues to increase, resulting in the stirring device being prone to breakage. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a urea granule drying processing system and drying method which are simple, efficient, safe, reliable and easy to operate, and can start and shut down an electromagnetic mechanism in sequence through a reversing device, and exert a force to rotate around the rotating shaft on the end of a stirring rod away from a rotating shaft through the electromagnetic mechanism and a magnetic material, thereby driving the stirring rod to rotate. By directly exerting a force to rotate around the rotating shaft on the stirring rod, the torsion force generated by the rotating shaft driving the stirring rod to rotate is removed, and the stirring device is prevented from breaking.

[0005] The present invention is realized by the following technical scheme, and provides a urea granule drying processing system and a drying method, comprising a tank body, an air inlet and an air outlet are opened on the tank body, and the air inlet is connected to a fan; a rotating shaft is arranged in the tank body, a collar is sleeved on the rotating shaft, a stirring rod is fixedly connected to the collar, and a magnetic material is arranged at one end of the stirring rod away from the rotating shaft; a plurality of electromagnetic mechanisms are fixedly arranged around the rotating shaft in sequence on the tank body, and the magnetic material is located within the magnetic field range of the electromagnetic mechanism; the electromagnetic mechanism is connected to a reversing device; the electromagnetic mechanism is sequentially started and closed by the reversing device, and a force for rotating around the rotating shaft is directly applied to the end of the stirring rod away from the rotating shaft through the electromagnetic mechanism and the magnetic material, and according to the lever principle, the torsion borne by the rotating shaft and the stirring rod during the stirring process is reduced, thereby preventing the stirring device from breaking; the stirring rod is driven to rotate by the magnetic force between the electromagnetic mechanism and the magnetic material, and when the stirring resistance is greater than the magnetic force, the stirring rod stops rotating to prevent the stirring device from breaking; by starting and closing different electromagnetic mechanisms, the magnitude of the magnetic force on the magnetic material is continuously changed, thereby continuously changing the stirring speed of the stirring rod, and improving the stirring efficiency of the stirring device.

[0006] As an optimization, a plurality of stirring rods evenly distributed around the ring are fixed to the ring, the electromagnetic mechanisms are evenly distributed around the rotating shaft, and the number of electromagnetic mechanisms is an integer multiple of the number of stirring rods; ensuring that the pulling force or repulsive force on the rotating shaft by the stirring rods offsets each other, preventing the rotating shaft from being deformed or broken under the action of the stirring rods.

[0007] As an optimization, stirring arms arranged in sequence along the axial direction of the rotating shaft are fixed on the stirring rod, and the stirring arms extend radially along the rotating shaft; the urea particles are further stirred by the stirring arms.

[0008] As an optimization, a transformer is provided on the side of the commutation device away from the electromagnetic mechanism, and the commutation device is connected to the power supply device through the transformer; the current is adjusted by the transformer, thereby adjusting the magnetic force of the electromagnetic mechanism, thereby continuously changing the moving speed of the urea particles in the tank and improving the drying efficiency.

[0009] As an optimization, the rotating shaft is provided with a plurality of rings arranged in sequence along the axial direction of the rotating shaft, and the rings are connected to the stirring rods in sequence; the stirring rods are reinforced by the rings to prevent the stirring rods from deformation or breakage during the stirring process.

[0010] A method for using a urea granule drying processing system comprises the following steps:

[0011] (1) Place the material in the tank;

[0012] (2) The current is adjusted by a transformer, thereby adjusting the attraction of the electromagnetic mechanism to the magnetic material;

[0013] (3) Start the reversing device and the electromagnetic mechanisms start in sequence;

[0014] (4) The electromagnetic mechanism applies a force to the magnetic material to rotate around the shaft, and the stirring rod rotates around the shaft and stirs the material;

[0015] (5) The stirring rod drives the stirring arm to rotate around the rotating shaft, and the stirring arm further stirs the material.

[0016] The beneficial effects of the present invention are as follows: the electromagnetic mechanism is started and closed in sequence by a reversing device, and a force for rotating around the rotating shaft is directly applied to the end of the stirring rod away from the rotating shaft by the electromagnetic mechanism and the magnetic material. According to the lever principle, the torsion borne by the rotating shaft and the stirring rod during the stirring process is reduced, thereby preventing the stirring device from breaking; the stirring rod is driven to rotate by the magnetic force between the electromagnetic mechanism and the magnetic material, and when the stirring resistance is greater than the magnetic force, the stirring rod stops rotating to prevent the stirring device from breaking; by starting and closing different electromagnetic mechanisms, the magnitude of the magnetic force exerted on the magnetic material is continuously changed, thereby continuously changing the stirring speed of the stirring rod and improving the stirring efficiency of the stirring device; ensuring that the pulling force or repulsive force exerted on the rotating shaft by the stirring rod offsets each other, thereby preventing the rotating shaft from being deformed or broken under the action of the stirring rod; further stirring the urea particles by the stirring arm; adjusting the current by the transformer, thereby adjusting the magnitude of the magnetic force of the electromagnetic mechanism, thereby continuously changing the moving speed of the urea particles in the tank, thereby improving the drying efficiency; reinforcing the stirring rod by the collar to prevent the stirring rod from being deformed or broken during the stirring process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front cross-sectional view of the present invention;

[0018] Figure 2 It is a schematic diagram of the structure of the present invention;

[0019] Figure 3 It is a top view cross-sectional view of the present invention;

[0020] As shown in the figure:

[0021] 1. Tank body, 2. Rotating shaft, 3. Ring, 4. Stirring rod, 5. Electromagnetic mechanism, 6. Reversing device, 7. Switching device, 8. Transformer, 9. Bearing, 10. Sealing device, 11. Stirring arm, 12. Fan, 13. Filtering device, 401. Magnetic material. DETAILED DESCRIPTION

[0022] In order to clearly illustrate the technical features of this solution, this solution is described below through a specific implementation method.

[0023] like Figure 1The urea granule drying treatment system and drying method of the present invention include a tank body 1, an air inlet and an air outlet are provided on the tank body 1, and the air inlet is connected to a fan 12; a rotating shaft 2 is provided in the tank body 1, a collar 3 is provided on the rotating shaft 2, a stirring rod 4 is fixedly connected to the collar 3, and a magnetic material 401 is provided at one end of the stirring rod 4 away from the rotating shaft 2; a plurality of electromagnetic mechanisms 5 are fixedly provided on the tank body 1 and arranged in sequence around the rotating shaft 2, and the magnetic material 401 is located within the magnetic field range of the electromagnetic mechanism 5; the electromagnetic mechanism 5 is connected to a reversing device 6; a filter device 13 is provided at the air inlet and the air outlet, and the filter device 13 adopts a filter screen or a grille, and the mesh of the filter device 13 is smaller than the diameter of the urea granules; the air inlet and the outlet of the fan are connected to each other. The air vents are connected; the electromagnetic mechanism 5 and the reversing device 6 are prior art; during the stirring process, the resistance to the stirring rod 4 mainly comes from the part where the stirring rod 4 stirs the urea particles, and the electromagnetic mechanism 5 and the magnetic material 401 directly apply a force to rotate around the rotating shaft 2 to the part where the stirring rod 4 stirs the urea particles. According to the lever principle, the magnetic force driving the stirring rod 4 to rotate is less than or equal to the resistance encountered by the stirring rod 4 when stirring the urea particles, so the torsion borne by the rotating shaft 2 and the stirring rod 4 is reduced, thereby avoiding the stirring device from breaking; the closer the magnetic material 401 is to the activated electromagnetic mechanism 5, the greater the electromagnetic magnetic force it is subjected to, and as it gradually approaches the activated electromagnetic mechanism 5, the rotation speed of the stirring rod 4 gradually increases.

[0024] The fan 12 is started, and the fan 12 blows air into the tank body 1 through the air inlet. The airflow passes through the gaps between the urea particles and takes away the moisture adsorbed by the urea particles. The reversing device 6 is started, and the electromagnetic mechanism 5 is started and closed in sequence. The electromagnetic mechanism 5 applies a force to the magnetic material 401 to rotate around the rotating shaft 2. The magnetic material 401 drives the stirring rod 4 to rotate around the rotating shaft 2, and the stirring rod 4 stirs the urea particles in the tank body.

[0025] like Figure 1 and Figure 3 A plurality of stirring rods 4 evenly distributed around the collar 3 are fixedly connected to the collar 3, and the electromagnetic mechanisms 5 are evenly distributed around the rotating shaft 2, and the number of the electromagnetic mechanisms 5 is an integer multiple of the number of the stirring rods 4; the number of brushes evenly distributed around the axis of the reversing device 6 in the reversing device 6 is consistent with the number of the stirring rods 4, and is used to ensure that the electromagnetic mechanisms 5 corresponding to the stirring rods 4 are started at the same time; the electromagnetic mechanisms 5 that are the same in number as the stirring rods 4 and evenly distributed around the rotating shaft 2 are started at the same time, and the stirring rods 4 are simultaneously subjected to electromagnetic forces of the same magnitude and directions arranged sequentially around the rotating shaft 2, and the pulling forces or repulsive forces on the rotating shaft 2 subjected to the stirring rods 4 offset each other.

[0026] like Figure 1 and Figure 3The stirring rod 4 is provided with stirring arms 11 arranged in sequence along the axial direction of the rotating shaft 2, and the stirring arms 11 extend radially along the rotating shaft 2; the spacing between adjacent stirring arms 11 is greater than the diameter of the urea granules; the stirring rod 4 rotates around the rotating shaft 2 and drives the stirring arms 11 to stir the urea granules, thereby accelerating the drying of the urea granules.

[0027] like Figure 1 A transformer 8 is provided on the side of the commutation device 6 away from the electromagnetic mechanism 5, and the commutation device 6 is connected to a power supply device through the transformer 8; by adjusting the voltage of the transformer 8 and the current in the electromagnetic mechanism 5, the magnetic field strength of the electromagnetic machine changes, and the electromagnetic force on the magnetic material 401 changes.

[0028] like Figure 1 The rotating shaft 2 is shown as being provided with a plurality of collars 3 which are sequentially arranged along the axial direction of the rotating shaft 2, and the collars 3 are sequentially connected to the stirring rods 4; the stirring rods 4 are reinforced by the collars 3 to prevent the stirring rods 4 from being deformed or broken during the stirring process.

[0029] like Figure 1 As shown, each electromagnetic mechanism 5 is connected to the reversing device 6 via a switch device 7; different electromagnetic mechanisms 5 are turned on or off via the switch device 7 to adjust the magnitude and direction of the magnetic force on the magnetic material 401, thereby changing the stirring speed and direction of the stirring rod 4 and improving the stirring efficiency of the stirring device; the electromagnetic mechanisms 5 at different positions are turned on or off to adjust the spacing between the electromagnetic mechanisms 5 turned on during the stirring process. After the reversing device 6 is started, the electromagnetic mechanisms 5 connected to the turned-on switch device 7 are turned on or off in turn, and the magnitude and direction of the magnetic force on the magnetic material 401 are changed, thereby changing the stirring speed and direction of the stirring rod 4.

[0030] like Figure 1 The collar 3 shown is connected to the rotating shaft 2 via the bearing 9; the collar 3 is coaxially fixed to the outer ring of the bearing 9, and the inner ring of the bearing 9 is coaxially fixed to the rotating shaft 2; the bearing 9 is used to reduce the friction between the collar 3 and the rotating shaft 2, prevent the collar 3 and the rotating shaft 2 from wearing, and reduce the torque applied by the collar 3 to the rotating shaft 2.

[0031] like Figure 1 As shown, sealing devices 10 are provided on both sides of the bearing 9 to prevent the urea particles in the tank from affecting the bearing 9 .

[0032] like Figure 2 The electromagnetic mechanism 5 is shown to be located outside the tank body 1, which is convenient for installation and subsequent maintenance.

[0033] A method for using a urea granule drying processing system comprises the following steps:

[0034] (1) placing the material in the tank 1;

[0035] (2) adjusting the current through the transformer 8, thereby adjusting the attraction of the electromagnetic mechanism 5 on the magnetic material 401;

[0036] (3) The reversing device 6 is started, and the electromagnetic mechanism 5 is started in turn;

[0037] (4) The electromagnetic mechanism 5 applies a force to the magnetic material 401 to rotate around the rotating shaft 2, and the stirring rod 4 rotates around the rotating shaft 2 and stirs the material;

[0038] (5) The stirring rod 4 drives the stirring arm 11 to rotate around the rotating shaft 2, and the stirring arm 11 further stirs the material.

[0039] In the actual production process, firstly, the current is adjusted by the transformer 8, and then the corresponding switch device 7 is turned on or off; the fan 12 is started, and the fan 12 blows air into the tank body 1 through the air inlet, and the airflow passes through the gaps between the urea particles and takes away the moisture adsorbed by the urea particles; finally, the reversing device 6 is started, and the electromagnetic mechanisms 5 connected to the turned-on switch device 7, which are the same in number as the stirring rods 4 and uniformly distributed around the rotating shaft 2, are turned on at the same time, and are turned on or off in sequence along the circumference of the rotating shaft 2, and the turned-on electromagnetic mechanisms 5 apply a force to the corresponding magnetic material 401 to rotate around the rotating shaft 2, and the magnetic material 401 drives the stirring rod 4 to rotate around the rotating shaft 2; the stirring rod 4 exerts a force on the urea in the tank body. The urea particles are stirred to accelerate the drying of the urea particles; the power for driving the stirring rod 4 to rotate around the rotating shaft 2 is directly applied to the stirring rod 4, thereby removing the torque transmitted by the rotating shaft 2 to the stirring rod 4. According to the lever principle, the torque borne by the rotating shaft 2 and the stirring rod 4 during the stirring process is reduced, thereby preventing the stirring device from breaking; when the stirring resistance is greater than the attraction of the electromagnetic mechanism 5 on the magnetic material 401, the stirring rod 4 stops rotating, thereby preventing the stirring rod 4 from forcibly stirring the urea particles and causing the stirring rod 4 to break; the electromagnetic mechanisms 5 evenly distributed around the rotating shaft 2 simultaneously apply the same force to the stirring rod 4, ensuring that the pulling force or repulsive force of the stirring rod 4 on the rotating shaft 2 offsets each other, thereby preventing the rotating shaft 2 from being deformed or broken under the action of the stirring rod 4.

[0040] The stirring rod 4 drives the stirring arm 11 to rotate around the rotating shaft 2, and the stirring arm 11 further stirs the urea granules to accelerate the drying of the urea granules.

[0041] Of course, the above description is not limited to the above examples. Technical features not described in the present invention can be achieved by or by using existing technologies, which will not be described here. The above embodiments and drawings are only used to illustrate the technical scheme of the present invention and are not limitations of the present invention. The present invention is described in detail with reference to the preferred implementation methods. Ordinary technicians in this field should understand that changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention do not depart from the purpose of the present invention, and should also fall within the scope of protection of the claims of the present invention.

Claims

1. A urea granule drying system, comprising a tank body (1), the tank body (1) being provided with an air inlet and an air outlet, the air inlet being connected to a fan (12); characterized in that: A rotating shaft (2) is arranged in the tank body (1), a sleeve (3) is sleeved on the rotating shaft (2), a stirring rod (4) is fixedly connected to the sleeve (3), and a magnetic material (401) is arranged at one end of the stirring rod (4) away from the rotating shaft (2); a plurality of electromagnetic mechanisms (5) are fixedly arranged in sequence around the rotating shaft (2) on the tank body (1), and the magnetic material (401) is located within the magnetic field range of the electromagnetic mechanism (5); and the electromagnetic mechanism (5) is connected to a reversing device (6).

2. The urea granule drying processing system according to claim 1, characterized in that: The collar (3) is fixedly connected to a plurality of stirring rods (4) evenly distributed around the collar (3); the electromagnetic mechanisms (5) are evenly distributed around the rotating shaft (2); and the number of the electromagnetic mechanisms (5) is an integral multiple of the number of the stirring rods (4).

3. The urea granule drying processing system according to claim 1, characterized in that: The stirring rod (4) is fixedly provided with stirring arms (11) which are arranged in sequence along the axial direction of the rotating shaft (2), and the stirring arms (11) extend radially along the rotating shaft (2).

4. The urea granule drying processing system according to claim 1, characterized in that: A transformer (8) is provided on the side of the commutation device (6) away from the electromagnetic mechanism (5), and the commutation device (6) is connected to a power supply device via the transformer (8).

5. The urea granule drying processing system according to claim 1, characterized in that: The rotating shaft (2) is provided with a plurality of sleeve rings (3) which are sequentially arranged along the axial direction of the rotating shaft (2), and the sleeve rings (3) are sequentially connected to the stirring rods (4).

6. A method for using the urea granule drying processing system according to any one of claims 1 to 5, characterized in that: The following steps are involved: (1) placing materials in the tank (1); (2) adjusting the current through the transformer (8), thereby adjusting the attraction of the electromagnetic mechanism (5) on the magnetic material (401); (3) starting the reversing device (6), and the electromagnetic mechanism (5) is started in sequence; (4) the electromagnetic mechanism (5) applies a force to the magnetic material (401) to rotate around the rotating shaft (2), and the stirring rod (4) rotates around the rotating shaft (2) to stir the material; (5) The stirring rod (4) drives the stirring arm (11) to rotate around the rotating shaft (2), and the stirring arm (11) further stirs the material.

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