An intelligent floating particle removal system

Abstract

The present invention provides an intelligent floating particle removal system, which includes a droplet forming device, a cooling device and a removal device; the droplet forming device is used to provide droplets; the cooling device includes a cooling belt, a driving wheel and a driven wheel, the cooling belt rotates around the driving wheel and the driven wheel, the cooling belt is used to cool the droplets to form crown fertilizer particles, the cooling belt includes a feed end and a discharge end, the feed end is used to receive the droplets, the discharge end refers to the part of the cooling belt that is transmitted to the driven wheel and is the position where the crown fertilizer particles are discharged; the removal device is arranged near the discharge end, and is used to drop the crown fertilizer particles from the cooling belt. The intelligent floating particle removal system provided by the present invention does not require a high tower, reduces production costs, produces a crown fertilizer, and can effectively drop the crown fertilizer particles from the cooling belt.

Description

Technical Field

[0001] The invention relates to the technical field of fertilizers, and in particular to an intelligent floating particle removal system. Background Art

[0002] At present, the technology of fertilizer production mainly utilizes high tower granulation production. The so-called high tower granulation is to use molten urea and raw materials such as phosphorus and potassium to make mixed slurry under the condition of full mixing, and spray down from the top of the high tower. The mixed slurry droplets interact with the air resistance rising from the bottom of the tower during the descent from the high tower, and are cooled to become granular fertilizer after heat exchange with it, and fall to the bottom of the tower, and then obtain granular composite fertilizer after screening. The purpose of using high tower granulation is to cool the fertilizer droplets in the process of descending from a height to form particles, but the construction and maintenance of the high tower currently require a large cost. The high tower is replaced by a low tower. Due to the limitation of the height of the low tower, the fertilizer droplets are not completely cooled or the particles formed do not meet the fertilizer standard, and the fertilizer shape is single. At present, there is a patent report that the fertilizer slurry is placed on a cooling belt to cool, but because the fertilizer itself has a certain viscosity, it is easy to stick to the cooling belt and is not easy to fall off, and it cannot be industrialized. Summary of the invention

[0003] In view of this, the present invention provides an intelligent floating particle removal system that can effectively remove fertilizer particles on a cooling belt, and the specific technical solution is described as follows.

[0004] An intelligent floating particle removal system, the intelligent floating particle removal system includes a droplet forming device, a cooling device and a removal device; the droplet forming device is used to provide droplets; the cooling device includes a cooling belt, a driving wheel and a driven wheel, the cooling belt rotates around the driving wheel and the driven wheel, the cooling belt is used to cool the droplets to form crown-shaped fertilizer particles, the cooling belt includes a feed end and a discharge end, the feed end is used to receive the droplets, the discharge end refers to the part of the cooling belt that is transmitted to the driven wheel and is the position where the crown-shaped fertilizer particles are discharged; the removal device is arranged close to the discharge end, and is used to remove the crown-shaped fertilizer particles from the cooling belt.

[0005] Preferably, the stripping device comprises a stripping scraper, the stripping scraper is arranged at the discharge end of the cooling belt, and the stripping scraper comprises a scraper portion, and the distance between the scraper portion and the discharge end is 0-1 mm.

[0006] Preferably, the driven wheel comprises a plurality of sub-driven wheels, and the plurality of sub-driven wheels are periodically arranged below the discharge end.

[0007] Preferably, the angle between the tangent line at the intersection of the scraper portion and the discharge end and the scraper portion is 0-45°.

[0008] Preferably, a plurality of protrusions are provided below the cooling belt, and when the cooling belt is transferred to the driven wheel, the protrusions are used to push out the crown-shaped fertilizer particles on the cooling belt to remove the crown-shaped fertilizer particles.

[0009] Preferably, the shedding device further comprises a vibration device, wherein the vibration device comprises a vibration motor and a vibration part, and the vibration part is arranged below the cooling belt.

[0010] Preferably, the vibration part is one or more of a vibration strip, a vibration sheet and a vibration rod.

[0011] Preferably, the surface of the cooling belt is further provided with one or a combination of a raised portion and a depressed portion.

[0012] Preferably, the distance between the receiving end and the discharging end is 5-100 meters, and the linear speed of the cooling belt is 0.2-2 meters per second.

[0013] Preferably, the droplet forming device provides a droplet pressure of 0.3-1.6 MPa and a viscosity of 1000-20000 centipoise.

[0014] Beneficial effects of the present invention: The intelligent floating particle removal system provided by the present invention does not require a high tower, reduces production costs, produces a crown fertilizer, and can effectively remove the crown fertilizer particles from the cooling belt. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic structural diagram of an intelligent floating particle removal system provided by the present invention.

[0016] Figure 2 A schematic diagram of the structure of the discharge end portion of an intelligent floating particle removal system provided by the present invention.

[0017] Figure 3 A schematic diagram of the structure of the discharge end portion of an intelligent floating particle removal system provided by the present invention.

[0018] Figure 4 A schematic diagram of the cooling zone structure of a smart floating particle removal system provided by the present invention.

[0019] Figure 5 A schematic structural diagram of a droplet forming device provided by the present invention.

[0020] Figure 6 for Figure 5 Schematic diagram of the structure of the AA section. DETAILED DESCRIPTION

[0021] The following is a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principles of the present invention, and these improvements and modifications are also considered to be within the scope of protection of the present invention. The terms "first", "second", etc. in the specification and claims of the present invention and the drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units that are inherent to these processes, methods, products or devices.

[0022] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0023] See also Figure 1The present invention provides an intelligent floating particle removal system 10, which includes a droplet forming device 100, a cooling device 200 and a removal device 300. The droplet forming device 100 is used to provide droplets. It is understandable that the droplet forming device 100 can be any device that can eject droplets. The cooling device 200 includes a cooling belt 210, a driving wheel 220 and a driven wheel 230, and the cooling belt 210 rotates around the driving wheel 220 and the driven wheel 230, and the cooling belt 210 is used to cool the droplets to form crown-shaped fertilizer particles. It is understandable that the cooling belt 210 can be a belt made of PVC, PU, ​​PE or rubber, preferably a steel belt, which absorbs the heat of the droplets faster to quickly cool the droplets. The cooling belt 210 includes a feed end 211 and a discharge end 212. The feed end 211 is used to receive the droplets, and the discharge end 212 refers to the portion of the cooling belt 210 that is transferred to the driven wheel 230 and is the position where the crown fertilizer particles are discharged. The droplets ejected from the droplet forming device 100 fall on the feed end 211. Preferably, the droplets fall on the feed end 211 at a vertical angle of plus or minus 45 degrees, so that the hardness of the cooled fertilizer particles is relatively large. After the droplets fall on the feed end 211, the cooling belt moves to the discharge end 212 under the action of the driving wheel and the driven wheel, and the droplets are cooled during the movement to form crown fertilizer particles. The stripping device 300 is arranged near the discharge end 212, and is used to remove the crown fertilizer particles from the cooling belt 210. Since the fertilizer droplets themselves have a certain viscosity, when the droplets fall on the cooling belt, the liquid is volatilized, and the crown fertilizer particles finally formed will stick to the cooling belt. When the crown fertilizer particles move to the discharge end, they cannot fall off the cooling belt well. The stripping device 300 in the present invention can fall off the crown fertilizer particles from the cooling belt 210 to speed up industrial production.

[0024] See also Figure 2In a further embodiment, the stripping device 300 includes a stripping scraper 310, and the stripping scraper 310 is arranged at the discharge end 212 of the cooling belt 210, and the stripping scraper 310 includes a scraper portion 311, and the distance between the scraper portion 311 and the discharge end 212 is 0-1 mm. It can be understood that when the distance between the scraper portion 311 and the discharge end 212 is 0 mm, that is, the scraper portion 311 overlaps the discharge end 212, but it is not a fixed overlap, but a movable overlap, and the cooling belt at the discharge end can still rotate around the driven wheel. At this time, the scraper portion 311 is closely adjacent to the cooling belt, and the force of the scraper portion on the crown fertilizer particles is opposite to the direction of transmission of the cooling belt, so the crown fertilizer particles can be effectively removed from the cooling belt. When the distance between the scraper portion 311 and the discharge end 212 is greater than 0 mm, the scraper portion 311 can remove the crown fertilizer particles with larger particle size. The distance between the scraper portion 311 and the discharge end 212 can be adjusted according to the fertilizer particles of different particle sizes. The preferred distance is 0.1-1 mm.

[0025] In a further embodiment, the shedding scraper 310 further includes a support portion (not shown), the support portion is movably connected to the driven wheel 230, and the support portion is connected to the scraper portion 311 to support the scraper portion 311. The driven wheel 230 rotates continuously in the working state, and the support portion is movably connected to the driven wheel, which can not only avoid hindering the rotation of the driven wheel, but also achieve the purpose of supporting the scraper portion 311. It is understandable that the support portion can also be set on the ground to support the scraper portion. It is understandable that the fertilizer particles scraped from the scraper portion are fed into the material collection device through the support portion.

[0026] In a further embodiment, the driven wheel 230 includes a plurality of sub-driven wheels 231, and the plurality of sub-driven wheels 231 are periodically arranged below the discharge end 212. A plurality of sub-driven wheels 231 are used at the discharge end, and the cooling belts between adjacent driven wheels have a relative effect, thereby increasing the tension of the cooling belt, which is beneficial to improving the shedding effect of the fertilizer particles on the surface of the cooling belt at the discharge end.

[0027] See also Figure 3In a further embodiment, the angle α between the tangent A at the intersection 213 of the scraper portion 311 and the scraper portion 311 is 0-45°. The tangent A at the intersection 213 of the scraper portion 311 and the discharge end 212 refers to the tangent A of the driven wheel at the intersection 213. The cooling belt of the discharge end 212 rotates around the driven wheel, and the movement direction of the cooling belt when it moves to the intersection is exactly the direction of the tangent A at the intersection 213. That is to say, the angle between the direction of the force of the scraper portion 311 on the crown fertilizer particles and the movement direction of the intersection is α, so that the fertilizer particles can be effectively removed from the cooling belt. The preferred angle α is 0-30°. More preferably, when the angle α is 0°, the direction of the force of the scraper portion 311 on the crown fertilizer particles is exactly opposite to the movement direction of the intersection, the force is maximum, and the scraping effect is better.

[0028] Please refer again Figure 2 In a further embodiment, a plurality of protrusions 214 are provided below the cooling belt 210. When the cooling belt 210 is transferred to the driven wheel 212, the protrusions 214 are used to push out the crown fertilizer particles on the cooling belt 210 to fall off the crown fertilizer particles. Preferably, the cooling belt 210 is made of PVC, PU, ​​PE or a rubber belt. Preferably, the hardness of the protrusions 214 is greater than that of the cooling belt 210. When the harder protrusions move to the driven wheel 212, the protrusions 214 push up the cooling belt 210, so that the fertilizer particles on the surface of the cooling belt 210 receive a force from below, so as to achieve the effect of falling off smoothly from the surface of the cooling belt 210. Preferably, the protrusions 214 are periodically arranged below the cooling belt.

[0029] In a further embodiment, the shedding device 300 further includes a vibration device 320, and the vibration device 320 includes a vibration motor 321 and a vibration part 322, and the vibration part 322 is arranged below the cooling belt 210. It is understood that the vibration motor 321 is connected to the vibration part 322, and the vibration motor 321 drives the vibration part 322 to vibrate after working, and the vibration part 322 placed below the discharge end 212 drives the discharge end 212 to vibrate, so as to loosen and reduce the adhesion between the fertilizer particles and the surface of the cooling belt, so as to smoothly remove the crown fertilizer particles on the cooling belt 210. It is understood that the vibration part 322 is arranged near the driven wheel 212, so that the fertilizer particles are sufficiently cooled before vibrating, so as to ensure the molding degree of the fertilizer particles.

[0030] In a further embodiment, the vibration part 322 is one or more of a vibration strip, a vibration sheet and a vibration rod.

[0031] See also Figure 4In a further embodiment, the surface of the cooling belt 210 is further provided with one or a combination of a protrusion 215 and a depression 216. The protrusion 215 and the depression 216 are used to form crown fertilizer particles with good sphericity after the droplets fall on the surface of the cooling belt. For example, when the cooling belt is a steel belt, when the surface of the steel belt is entirely arranged as depressions arranged periodically, when the droplets fall on the position with the depressions, the bottom of the crown fertilizer particles is formed in a shape similar to the depressions, thereby increasing the sphericity of the bottom. Or when the surface of the steel belt is entirely arranged as protrusions arranged periodically, pits are formed between adjacent protrusions, and due to the presence of the pits, the droplets can also form crown fertilizer particles with good sphericity. Although crown fertilizer particles with good sphericity can be obtained, the pits between the depressions and the protrusions will produce resistance to the falling of the crown fertilizer particles, making it difficult to fall off. However, the stripping device of the present invention can solve this problem, so that crown-shaped fertilizer particles with good sphericity can be obtained without affecting the discharging effect.

[0032] In a further embodiment, the distance between the receiving end and the discharging end is 5-100 meters, and the linear speed of the cooling belt is 0.2-2 meters per second. For example, when the distance between the receiving end and the discharging end is 100 meters, the linear speed of the cooling belt is 2 meters per second, and the cooling time of the fertilizer slurry droplets on the cooling belt is 50 seconds.

[0033] In a further embodiment, the droplet forming device provides a droplet pressure of 0.3-1.6 MPa and a viscosity of 1000-20000 centipoise. It is understood that the droplet pressure can be adjusted according to the different viscosities in different fertilizer components. Droplets within the above parameter range fall on the cooling belt and are then cooled by the cooling belt to obtain crown fertilizer particles with a hardness of 100-200 Newtons.

[0034] In a further embodiment, a circulating cooling device (not shown) is provided on the side of the cooling belt 210 opposite to the conveying fertilizer. The circulating cooling device is used for the cooling belt 210. The heat exchange speed of the cooling belt 210 causes the droplets falling on the surface of the cooling belt 210 to be rapidly cooled, forming crown-shaped fertilizer particles with high hardness and density. The circulating cooling device can be, but is not limited to, a circulating cooling water device, a circulating cooling liquid nitrogen device, or a circulating cooling dry ice device.

[0035] See also Figure 5 and Figure 6In a further embodiment, the droplet forming device 100 includes a discharge pipe 1100 and a discharge ring 1200. The discharge pipe 1100 is a hollow structure, and the discharge pipe 1100 includes a discharge pipe body 1110 and a nozzle 1120. The discharge pipe body 1110 includes a feed port 1112, a sealing end 1113 and a tube wall 1111, the feed port 1112 and the sealing end 1113 are arranged opposite to each other, the tube wall 1111 is arranged between the feed port 1112 and the sealing end 1113, the nozzle 1120 is arranged on the tube wall 1111, and the nozzle 1120 is connected with the feed port 1112. The nozzle 1120 is provided with periodically arranged first discharge holes 1121, and the feed port 1112 is connected with the first discharge holes 1121. The hollow structure of the discharge pipe 1100 is used to accommodate and convey the slurry. The slurry is conveyed to the discharge pipe 1100 by a delivery pump or under the action of gravity, and is ejected from the first discharge hole 1121. One end of the discharge pipe body is provided with a sealing end 1113, so that the slurry is conveyed in the pipeline of the discharge pipe body 1110 after entering from the feed port 1112. When the slurry is conveyed to the sealing end 1113, due to the obstruction of the sealing end 1113, the slurry with pressure and speed is squeezed at the sealing end to form a larger pressure and speed and then squeezed out from the first discharge hole 1121. The setting of the sealing end 1113 can increase the pressure and speed of the slurry, or reduce the power of the delivery pump under the same pressure and speed requirements. The discharge pipe 1100 can be circular, elliptical, etc.

[0036] It is understandable that the discharge pipe 1100 is arranged at the center or off-center of the discharge ring 1200. Preferably, the discharge pipe 1100 approaches the discharge ring body 1210 from the direction where the nozzle 1120 is arranged, that is, the axis (not shown) of the discharge ring 1200 does not coincide with the axis 1114 of the discharge pipe 1100, and the axis 1114 of the discharge pipe 1100 is closer to the nozzle 1120 than the axis of the discharge ring 1200. The distance between the discharge ring 1200 and the discharge pipe 1100 can be shortened so that the discharge ring 1200 can cut the slurry with a relatively high speed extruded from the nozzle 1120.

[0037] It is understandable that the cylindrical hollow structure refers to a cylindrical structure with a hollow center. Preferably, the discharge ring body 1210 may be, but is not limited to, a cylindrical hollow structure or a multi-prism cylindrical structure. It is understandable that the discharge ring 1200 being able to rotate around the discharge tube 1100 means that the discharge ring 1200 itself is able to rotate around the axis 1114 of the discharge ring, or it can be said that the discharge ring 1200 is rotating on its own. It is worth mentioning that in Figure 4The second discharge hole 1220 is not seen on the discharge ring body 1210 in the figure. This is because the second discharge hole 1220 is not shown in the cross-sectional view when the discharge ring body 1210 is rotated to a certain position. When the discharge ring body 1210 is rotated to another angle, the material hole 1200 can be shown in the cross-sectional view. The second discharge hole 1220 on the discharge ring body 1210 can be seen in the figure. Figure 6 shown.

[0038] When the system is working, the slurry is transported to the discharge pipe 1100, accumulated in the discharge pipe body 1110, and extruded through the nozzle 1120 connected to the discharge pipe body 1110. During operation, the discharge ring body 1210 rotates around the discharge pipe 1100 continuously, and the slurry extruded from the first discharge hole 1121 in the nozzle 1120 is cut off by the second discharge hole 1220 on the rotating discharge ring body 1210, forming droplets, wherein the cutting direction is perpendicular to the direction in which the slurry is ejected from the nozzle. The slurry extruded from the nozzle 1120 passes through the second discharge hole 1220 on the discharge ring 1210. Since the second discharge hole 1220 rotates continuously with the discharge ring body 1210, the slurry is substantially cut off by the second discharge hole 1220 when passing through the second discharge hole 1220, thereby forming droplets. The droplets coming out of the second discharge hole 1220 fall onto the surface of the cooling belt 210 to cool. The cooling belt 210 moves under the action of the driving wheel and the driven wheel. The droplets cool during the movement. Finally, the crown-shaped fertilizer particles fall from the surface of the cooling belt 210 at the edge of the driven wheel into the collecting device. It can be understood that the slurry can be fertilizer slurry or other slurry that needs to be converted into droplets. The fertilizer slurry refers to a fertilizer slurry formed by mixing one or more of nitrogen fertilizer, phosphorus fertilizer, potassium fertilizer, medium and trace element fertilizer, organic carbon fertilizer, microbial fertilizer, etc., wherein the mixing method can be primary mixing, secondary mixing, tertiary mixing, etc. It can be understood that the order, temperature, pH value and other conditions of the fertilizer slurry mixing are not limited and can be adjusted according to the characteristics of the raw material components of the fertilizer slurry and the mixing requirements.

[0039] See also Figure 6 In a further embodiment, the discharge pipe 1100 further comprises a sparger 1130, the sparger 1130 is arranged between the nozzle 1120 and the discharge ring 1200, the sparger 1130 is provided with a sparger outlet 1131 intersecting the feed inlet 1112, and the aperture of the sparger outlet 1131 is smaller than the aperture of the first discharge hole 1121. It is understood that the aperture of the sparger outlet 1131 is 0.5-10 mm. The sparger is arranged on the discharge pipe by snapping or welding, and is preferably sealed and connected to the wall of the discharge pipe to prevent the fertilizer slurry from flowing out of the gap and causing uneven droplet spraying.

[0040] In a further embodiment, the direction of the opening of the nozzle 1120 is within a range of plus or minus 45 degrees in the vertical direction. It is understood that after the slurry passes through the nozzle 1120, it can be sprayed in a vertical downward direction, or in a direction within a range of 45 degrees to the left of the vertical direction or within a range of 45 degrees to the right of the vertical direction. The distance between the nozzle 1120 and the discharge ring body 1210 is 0.5-20 mm. It is understood that the distance between the nozzle 1120 and the nearest side wall of the discharge ring body 210 is 0.5-20 mm. So that the slurry coming out of the nozzle 1120 passes through the discharge hole 220 on the discharge ring body 210 at a higher speed.

[0041] In a further embodiment, the distance between the discharge pipe 1100 and the discharge ring 1200 is 0.5-20 mm. At this distance, the discharge ring 1200 can cut the droplets sprayed from the discharge pipe 1100 at a high speed, so that the droplets coming out of the second discharge hole 1220 can still maintain a relatively high speed. The distance between the discharge ring 1200 and the cooling belt 210 is 3-500 mm. The droplets with a relatively high speed falling on the cooling belt 210 at the above distance can form crown-shaped fertilizer particles with a hardness of more than 100 Newtons, preferably, crown-shaped fertilizer particles with a hardness of 100-200 Newtons. It can be understood that the viscosity of the fertilizer slurry in the discharge pipe 1100 is 1000-20000 centipoise, and the pressure of the fertilizer slurry is 0.3-1.6 MPa.

[0042] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. An intelligent floating particle removal system, characterized in that: The intelligent floating particle removal system includes a droplet forming device, a cooling device and a removal device; the droplet forming device is used to provide droplets; the cooling device includes a cooling belt, a driving wheel and a driven wheel, the cooling belt rotates around the driving wheel and the driven wheel, the cooling belt is used to cool the droplets to form crown-shaped fertilizer particles, the cooling belt includes a feed end and a discharge end, the feed end is used to receive the droplets, the discharge end refers to the part of the cooling belt that is transmitted to the driven wheel and is the position where the crown-shaped fertilizer particles are discharged; the removal device is arranged near the discharge end, and is used to remove the crown-shaped fertilizer particles from the cooling belt; The stripping device includes a stripping scraper, which is arranged at the discharge end of the cooling belt, and the stripping scraper includes a scraper portion, and the scraper portion overlaps the discharge end; the driven wheel includes a plurality of sub-driven wheels, and the plurality of sub-driven wheels are periodically arranged below the discharge end, and the plurality of sub-driven wheels are used to increase the tension of the cooling belt; a plurality of protrusions are provided below the cooling belt, and when the cooling belt is transmitted to the driven wheel, the protrusions are used to push out the crown fertilizer particles on the cooling belt to remove the crown fertilizer particles.

2. The intelligent floating particle removal system according to claim 1, characterized in that: The distance between the scraper portion and the discharge end is 0-1 mm.

3. The intelligent floating particle removal system according to claim 1, characterized in that: The angle between the tangent line at the intersection of the scraper portion and the discharge end and the scraper portion is 0-45°.

4. The intelligent floating particle removal system according to claim 1, characterized in that: The stripping device further comprises a vibration device, wherein the vibration device comprises a vibration motor and a vibration part, and the vibration part is arranged below the cooling belt.

5. The intelligent floating particle removal system according to claim 4, characterized in that: The vibration part is one or more of a vibration strip, a vibration sheet and a vibration rod.

6. The intelligent floating particle removal system according to claim 1, characterized in that: The surface of the cooling belt is also provided with one or a combination of a convex portion and a concave portion.

7. The intelligent floating particle removal system according to claim 1, characterized in that: The distance between the feed end and the discharge end is 5-100 meters, and the linear speed of the cooling belt is 0.2-2 meters per second.

8. The intelligent floating particle removal system according to claim 1, characterized in that: The droplet forming device provides a droplet pressure of 0.3-1.6 MPa and a viscosity of 1000-20000 centipoise.

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