A method for the production of enhanced efficiency urea

Abstract

The application discloses a kind of methods for realizing synergistic urea production, it is related to chemical fertilizer production technical field;Including diversion hopper, the right side surface of diversion hopper is equipped with shunt mechanism, the position corresponding with the lower side port of shunt mechanism is provided with buffer storehouse, the lower side of discharge valve is provided with conveying mechanism, the upper side corresponding position of conveying mechanism is provided with powder catching spiral conveyor, coating machine is provided with spraying mechanism, monitoring mechanism is installed on the side wall of conical hopper, the lower surface discharge port of conical hopper is provided with finished product warehouse in the position corresponding;The present application can add solid and liquid additives, production flexibility is high, use shunt mechanism to distribute urea, save increase trousers and belt conveyor equipment investment cost, save floor space, improve urea particle surface adhesion, increase urea particle coating detection function, avoid dust drift, and increase the drying function of urea particle after coating, make it fast solidification medicine film, prevent moisture absorption, prevent caking, facilitate use.

Description

Technical Field

[0001] This invention relates to the field of fertilizer production technology, specifically to a method for achieving enhanced urea production. Background Technology

[0002] Urea is an important nitrogen fertilizer. Currently, domestic urea production capacity is relatively excessive. Traditional nitrogen fertilizer companies are actively transforming towards new, high-efficiency fertilizers to increase product added value and adapt to the needs of modern agriculture. High-efficiency urea, produced by adding functional additives such as urease inhibitors, nitrification inhibitors, or trace elements to the surface of ordinary urea granules, can improve nitrogen utilization and reduce losses, representing an important development direction.

[0003] Currently, in traditional processes, to achieve efficient processing of a portion of the existing urea granule stream, a "shorts" type feeder, gate valve, and additional conveyor belts are typically required to guide the granules into a separate buffer silo. This system involves numerous devices, complex layout, large footprint, and requires significant clearance, making it unsuitable for installation in many older plants or leading to substantial retrofitting investments. The feeding and metering stages before the buffer silo are particularly crucial for ensuring product quality; metering equipment requires a stable flow of material from the buffer silo to guarantee accuracy. However, the buffer silo itself and its upstream feeding and conveying equipment constitute the majority of the space occupied. Therefore, how to achieve a reliable, accurate, and cost-effective urea raw material (feeding and supply system) within extremely limited space has become a key technological bottleneck restricting the upgrading and transformation of older urea enterprises. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a method for achieving enhanced urea production, thereby solving the problems mentioned in the background section.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a method for achieving enhanced urea production, comprising the following steps: S1. Material Distribution and Buffering: A guide hopper is installed at the end of the conveyor belt of the original urea granule production line, where a granule curtain is formed. A diversion mechanism is inserted into the right side wall of the guide hopper. This chute uses the weight of the urea granules to naturally receive a portion of the falling granules and guide them to an independently set buffer bin. The buffer bin is preferably 2 tons to ensure the stability of subsequent metering. When the buffer bin is full, the flow of granules guided in the diversion mechanism is full, and subsequent granules can no longer enter the diversion mechanism, thus automatically overflowing and falling back to the original urea granule packaging line. When the buffer bin needs to be replenished, the granules automatically flow in through the diversion mechanism. This process is achieved entirely by the gravity and flow characteristics of the material, without the need for any valve switching or power equipment. Furthermore, the vibration function of the diversion mechanism is added to prevent urea granules from bridging, agglomerating, or clogging in the chute. S2. Metering and conveying: A metering belt scale is connected to the discharge valve below the buffer silo. The urea granules are conveyed to the elevator according to the precise feeding amount required for the production ratio of enhanced urea, and then sent to the surface treatment mechanism via the belt conveyor. S3. Surface treatment: Urea particles fall into the guide channel and are broken by the surface treatment mechanism to prevent them from clumping in the coating machine. The surface treatment mechanism also activates the outer surface of the urea particles to improve their adhesion and make it difficult for solid or liquid agents to fall off the urea particles. S4. Mixing and Coating: In the coating machine, the urea particles from step 2 are thoroughly mixed with the additive. The additive is in liquid form and is precisely added to the coating machine through a spraying mechanism; or it can be a powdered solid additive, which is quantitatively added to the coating machine through a powder screw conveyor. The coating machine stirs the urea particles to make the surface of the additive uniformly coated. S5. Detection and Collection: The urea granules coated by the coating machine are scanned by the monitoring agency to analyze the content and uniformity of the surface enhancement components of each batch of urea granules. The analysis data is transmitted to the control system in real time and then collected in the finished product silo. The urea granules in the finished product silo are dried by the drying agency. Without causing the urea granules to melt, the moisture in the agent on the surface of the urea granules is quickly evaporated or the chemical reaction to form a film is promoted. During this process, the dust in the coating machine is collected by the dust collection agency to make the site environment cleaner. S6. Finished Product Packaging: After the coating is completed, the enhanced urea granules are sent to the enhanced urea finished product warehouse through the conveyor belt on the lower side of the finished product warehouse for weighing and packaging.

[0006] Furthermore, a diversion mechanism is installed on the right side of the guide hopper, and a buffer bin is set at the corresponding position of the lower port of the diversion mechanism. A discharge valve is set on the lower surface of the buffer bin, and a conveying mechanism is set below the discharge valve. A surface treatment mechanism is set at the lower position of the right end of the conveying mechanism. The discharge port of the surface treatment mechanism is set corresponding to the inlet of the coating machine. A powder-spraying screw conveyor is set at the corresponding position on the upper side of the conveying mechanism. A spraying mechanism is set on the coating machine. A conical hopper is set on the right side of the coating machine. A monitoring mechanism and a dust collection mechanism are installed on the side wall of the conical hopper. A finished product bin is set at the corresponding position of the discharge port on the lower surface of the conical hopper. A drying mechanism is set at the lower edge of the side wall of the finished product bin.

[0007] As a preferred embodiment of the present invention, the diversion mechanism includes a chute, a corrugated pipe, a rectangular opening, a guide plate, and a vibration motor. Corrugated pipes are fixedly installed on both the upper and lower ends of the chute, and the upper and lower corrugated pipes are respectively connected to the right side wall of the guide bucket and the upper side wall of the buffer bin. A rectangular opening is provided on the right side wall of the guide bucket corresponding to the chute. A guide plate is fixedly installed between the front and rear inner walls of the guide bucket corresponding to the lower side wall of the rectangular opening. Vibration motors are fixedly installed on both the front and rear sides of the chute.

[0008] Furthermore, the guide plate has an inclination angle of 45-60 degrees, and the left and right lengths of the guide plate are two-thirds of the left and right lengths of the guide bucket.

[0009] Furthermore, the conveying mechanism includes a metering belt scale, an elevator, and a belt conveyor. The metering belt scale is located below the discharge valve. An elevator is located on the right side of the metering belt scale. A belt conveyor is located at the right outlet of the elevator, and the right outlet of the belt conveyor is correspondingly located to the feed inlet of the coating machine.

[0010] Furthermore, the spraying mechanism includes a liquid storage tank, a steam heat exchange component, a conduit, a pump body, an electric flow meter, an atomizing nozzle assembly, and a temperature control component. The liquid storage tank is equipped with the steam heat exchange component and the temperature control component. A conduit is installed at the outlet of the liquid storage tank, and the pump body and the electric flow meter are connected in series in the conduit. An atomizing nozzle assembly is installed at the outlet of the conduit, and the atomizing nozzle assembly is located inside the coating machine.

[0011] Furthermore, the monitoring mechanism includes a controller, an alarm, and a hyperspectral imaging detector. The controller is installed on the right side of the conical hopper, and the alarm is installed on the controller. The hyperspectral imaging detector is installed on the upper inner wall of the conical hopper, and the hyperspectral imaging detector is set corresponding to the outlet of the coating machine.

[0012] Furthermore, the drying mechanism includes an air distribution pipe, branch pipes, and one-way air outlets. The air distribution pipe is fixedly installed on the lower right side of the finished product hopper. Branch pipes are evenly installed on the front and back of the left side of the air distribution pipe and inserted into the finished product hopper. One-way air outlets are evenly distributed on the front and back sides of the branch pipes.

[0013] Furthermore, the front-to-back spacing of the branch pipe is 5-10cm.

[0014] Furthermore, the surface treatment mechanism includes a plasma electrode, a gas distribution box, an air inlet pipe, a drive motor, a transmission pipe, a mechanical seal, an air inlet hole, a stirring pipe, and an air outlet hole. The plasma electrode is embedded in the upper side wall of the guide groove. The gas distribution box is fixedly installed on the rear side of the guide groove. An air inlet pipe is fixedly installed on the left side of the gas distribution box. The drive motor is fixedly installed on the rear side of the gas distribution box. A transmission pipe is fixedly installed in front of the output shaft of the drive motor. The transmission pipe is inserted into the guide groove, and mechanical seals are provided on the front and rear side walls of the gas distribution box corresponding to the transmission pipe. An air inlet hole is opened on the side wall of the transmission pipe inside the gas distribution box. Stirring pipes are evenly installed on the outer surface of the transmission pipe inside the guide groove, and air outlet holes are evenly opened on the stirring pipes.

[0015] Furthermore, the dust collection mechanism includes an air filter, a dust collection pipe, a dust collection hood, and a fan. The air filter is installed on the right side of the conical hopper. A dust collection pipe is installed on the air inlet of the air filter, and the dust collection pipe passes through the conical hopper and is inserted into the coating machine. Dust collection hoods are evenly installed on the lower surface of the dust collection pipe, and a fan is installed on the air outlet of the air filter.

[0016] Compared with the prior art, the present invention provides a method for achieving enhanced urea production, which has the following beneficial effects: 1. This method for improving urea production efficiency not only allows for the addition of solid additives by setting up a powder-coating screw conveyor, but also allows for the addition of liquid agents by a spraying mechanism, resulting in high production flexibility. Furthermore, it creatively utilizes the physical properties of urea granules, which have good fluidity, and uses a diversion mechanism to distribute urea. When the buffer silo is full, the urea granules overflow through the diversion mechanism back to the original system for conventional urea packaging. When the buffer silo is low, the urea granules are automatically replenished through a chute, saving the investment costs of adding belt conveyors and other equipment, as well as saving space in the equipment layout. Moreover, during the diversion process, the urea granules in the chute are less prone to agglomeration, bridging, or blockage.

[0017] 2. This method for improving the efficiency of urea production activates the surface of urea particles through a surface treatment mechanism, greatly enhancing the adhesion of the urea particle surface, making the agent adhere more firmly to the urea particles, and can also break up the urea particles to avoid poor coating effect of agglomerated urea particles in the coating machine.

[0018] 3. This method for improving urea production efficiency adds a urea particle coating detection function by setting up a monitoring mechanism. When the urea particle coating effect is poor, an alarm can be triggered to the staff, which is conducive to timely detection of problems. It also adds a dust collection function during the coating process, making the work site cleaner. Furthermore, it adds a drying function to dry the coated urea particles in the finished product warehouse through a drying mechanism, which allows the coating to solidify quickly, prevent moisture absorption and clumping, and facilitate use. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the main structure of the present invention; Figure 2 This is a schematic cross-sectional view of the flow guide bucket structure of the present invention; Figure 3 This is a schematic cross-sectional view of the storage tank of the present invention; Figure 4 This is a schematic cross-sectional view of the conical bucket structure of the present invention; Figure 5 This is a schematic cross-sectional view of the finished product warehouse of the present invention; Figure 6 This is a schematic diagram of the main cross-sectional view of the flow guide channel of the present invention; Figure 7 This is a top-view cross-sectional view of the flow guide channel of the present invention; Figure 8 This is a schematic diagram of the process structure of the present invention.

[0020] In the diagram: 1. Guide bucket; 2. Diverting mechanism; 201. Chute; 202. Corrugated pipe; 203. Rectangular opening; 204. Guide plate; 205. Vibrating motor; 3. Buffer bin; 4. Discharge valve; 5. Conveying mechanism; 501. Measuring belt scale; 502. Elevator; 503. Belt conveyor; 6. Coating machine; 7. Powdering screw conveyor; 8. Spraying mechanism; 801. Storage tank; 802. Steam heat exchanger assembly; 803. Pipe; 804. Pump body; 805. Electric flow meter; 806. Atomizing nozzle assembly; 807. Temperature control assembly; 9. Conical bucket; 10. Monitoring mechanism; 101. Controller; 102. Alarm; 103. Hyperspectral Imaging Detector; 11. Finished Product Warehouse; 12. Drying Mechanism; 121. Air Distribution Pipe; 122. Branch Pipe; 123. One-Way Air Outlet; 13. Guide Channel; 14. Surface Treatment Mechanism; 141. Plasma Electrode; 142. Air Distribution Box; 143. Air Inlet Pipe; 144. Drive Motor; 145. Transmission Pipe; 146. Mechanical Seal; 147. Air Inlet; 148. Stirring Pipe; 149. Air Outlet; 15. Dust Collection Mechanism; 151. Air Filter; 152. Dust Collection Pipe; 153. Dust Collection Hood; 154. Fan. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Please refer to Figures 1-8This invention discloses a method for achieving enhanced urea production, comprising a guide hopper 1, a diversion mechanism 2 installed on the right side of the guide hopper 1, a buffer chamber 3 positioned corresponding to the lower port of the diversion mechanism 2, a discharge valve 4 positioned on the lower surface of the buffer chamber 3, a conveying mechanism 5 positioned below the discharge valve 4, a surface treatment mechanism 14 positioned below the right end of the conveying mechanism 5, the discharge port of the surface treatment mechanism 14 corresponding to the inlet of the coating machine 6, a powder-spraying screw conveyor 7 positioned corresponding to the upper side of the conveying mechanism 5, a spraying mechanism 8 positioned on the coating machine 6, a conical hopper 9 positioned on the right side of the coating machine 6, a monitoring mechanism 10 and a dust collection mechanism 15 installed on the side wall of the conical hopper 9, a finished product hopper 11 positioned corresponding to the discharge port on the lower surface of the conical hopper 9, and a drying mechanism 12 positioned at the lower edge of the side wall of the finished product hopper 11.

[0023] like Figure 2 As shown, in some embodiments, the diversion mechanism 2 includes a chute 201, a corrugated pipe 202, a rectangular opening 203, a guide plate 204, and a vibration motor 205. The upper and lower ends of the chute 201 are both fixedly installed with corrugated pipes 202, and the upper and lower corrugated pipes 202 are respectively connected to the right side wall of the guide bucket 1 and the upper side wall of the buffer bin 3. A rectangular opening 203 is opened on the right side wall of the guide bucket 1 corresponding to the chute 201. A guide plate 204 is fixedly installed between the front and rear inner walls of the guide bucket 1 corresponding to the lower side wall of the rectangular opening 203. A vibration motor 205 is fixedly installed on both the front and rear sides of the chute 201.

[0024] In this embodiment, the guide plate 204 guides the urea particles falling into the guide hopper 1 to flow into the chute 201 through the rectangular opening 203, and then into the buffer bin 3 through the chute 201. When the chute 201 is full, the urea particles flow out along the original route. In use, the upper and lower corrugated pipes 202 increase the extensibility of the middle chute 201. The front and rear vibration motors 205 can drive the chute 201 to vibrate, so that the urea particles in the chute 201 are not easy to condense, bridge or block, ensuring smooth urea flow.

[0025] like Figure 2 As shown, in some embodiments, the tilt angle of the guide plate 204 is 45-60 degrees, and the left and right lengths of the guide plate 204 are two-thirds of the left and right lengths of the guide bucket 1.

[0026] In this embodiment, the guide plate 204 can guide most of the urea particles to ensure that the urea particles can flow to the chute 201.

[0027] like Figure 1As shown, in some embodiments, the conveying mechanism 5 includes a metering belt scale 501, an elevator 502, and a belt conveyor 503. The metering belt scale 501 is arranged below the discharge valve 4. The elevator 502 is arranged on the right side of the metering belt scale 501. The belt conveyor 503 is arranged at the right outlet of the elevator 502, and the right outlet of the belt conveyor 503 is corresponding to the feed inlet of the coating machine 6.

[0028] In this embodiment, the metering belt scale 501 weighs the urea particles flowing into the buffer bin 3 through the discharge valve 4, and after weighing, the urea particles are conveyed to the elevator 502, and then conveyed to the belt conveyor 503, and then conveyed into the coating machine 6.

[0029] like Figure 1 and Figure 3 As shown, in some embodiments, the spraying mechanism 8 includes a liquid storage tank 801, a steam heat exchange component 802, a conduit 803, a pump body 804, an electric flow meter 805, an atomizing nozzle assembly 806, and a temperature control component 807. The liquid storage tank 801 is equipped with the steam heat exchange component 802 and the temperature control component 807. The conduit 803 is installed at the outlet of the liquid storage tank 801, and the pump body 804 and the electric flow meter 805 are connected in series in the conduit 803. The atomizing nozzle assembly 806 is installed at the outlet of the conduit 803, and the atomizing nozzle assembly 806 is disposed inside the coating machine 6.

[0030] In this embodiment, the steam heat exchange component 802 and the temperature control component 807 regulate the temperature of the liquid agent in the storage tank 801, and then the liquid agent is drawn into the atomizing nozzle component 806 through the pump body 804 and the conduit 803. The liquid agent is evenly sprayed into the coating machine 6 through the atomizing nozzle component 806, and the electric flow meter 805 monitors the flow rate and metering of the liquid agent.

[0031] like Figure 4 As shown, in some embodiments, the monitoring mechanism 10 includes a controller 101, an alarm 102, and a hyperspectral imaging detector 103. The controller 101 is installed on the right side of the conical bucket 9, and the alarm 102 is installed on the controller 101. The hyperspectral imaging detector 103 is installed on the upper inner wall of the conical bucket 9, and the hyperspectral imaging detector 103 is correspondingly set to the outlet of the coating machine 6.

[0032] In this implementation scheme, the hyperspectral imaging detector 103 photographs the urea particles that have completed coating as they flow into the conical hopper 9 from the coating machine 6, and feeds the information back to the controller 101 to analyze the content and distribution uniformity of the surface synergistic components. If the processing module inside the controller 101 detects that the coating effect is not good, the controller 101 will trigger the alarm 102 to alert the on-site staff. Alternatively, the controller 101 can feed the information back to the back-end server through the internal wireless communication module to remind the back-end supervisors.

[0033] like Figure 5 As shown, in some embodiments, the drying mechanism 12 includes an air distribution pipe 121, a branch pipe 122, and a one-way air outlet 123. The air distribution pipe 121 is fixedly installed on the lower right side of the finished product hopper 11. The branch pipe 122 is evenly installed on the front and back of the left side of the air distribution pipe 121, and the branch pipe 122 is inserted into the finished product hopper 11. The one-way air outlet 123 is evenly distributed on the front and back sides of the branch pipe 122.

[0034] In this embodiment, a large amount of low-grade waste heat generated during the urea granulation process (such as humid hot air at 40-60°C recovered from the top of the granulation tower or the tail gas) is used. After the recovered waste heat is purified by a filter, it is blown into the air distribution pipe 121 at a low speed and in a uniform manner. Then, it flows into the branch pipe 122 through the air distribution pipe 121 and is blown into the finished product silo 11 through the one-way air outlet 123 on the branch pipe 122. This system can accurately control the hot air temperature and flow rate, and can quickly evaporate the moisture in the agent on the surface of the granules or promote the chemical reaction to form a film without causing the urea granules to melt (the melting point of urea is about 143°C).

[0035] like Figure 5 As shown, in some embodiments, the front-to-back spacing of the branch pipe 122 is 5-10 cm.

[0036] In this implementation scheme, adjacent branch pipes 122 are less likely to cause urea particles to bridge or become blocked.

[0037] like Figure 5 and Figure 7As shown, in some embodiments, the surface treatment mechanism 14 includes a plasma electrode 141, a gas distribution box 142, an air inlet pipe 143, a drive motor 144, a transmission pipe 145, a mechanical seal 146, an air inlet 147, a stirring pipe 148, and an air outlet 149. The plasma electrode 141 is embedded in the upper side wall of the guide groove 13. The gas distribution box 142 is fixedly installed on the rear side of the guide groove 13. The air inlet pipe 143 is fixedly installed on the left side of the gas distribution box 142, and the rear side of the gas distribution box 142 is fixedly installed on the left side. A transmission pipe 145 is fixedly installed on the front of the output shaft of the drive motor 144. The transmission pipe 145 is inserted into the guide groove 13, and mechanical seals 146 are provided on the front and rear side walls of the air distribution box 142 corresponding to the transmission pipe 145. An air inlet 147 is opened on the side wall of the transmission pipe 145 located in the air distribution box 142. A stirring pipe 148 is evenly installed on the outer surface of the transmission pipe 145 located in the guide groove 13. An air outlet 149 is evenly opened on the stirring pipe 148.

[0038] In this embodiment, the plasma electrode 141 discharges, and external oxygen-argon gas flows into the gas distribution box 142 through the gas inlet pipe 143. The gas in the gas distribution box 142 flows into the transmission pipe 145 through the gas inlet hole 147, and then into the stirring pipe 148 through the transmission pipe 145. Finally, it is blown out through the gas outlet hole 149 on the stirring pipe 148. The external oxygen-argon gas mixes and contacts the discharge plasma, performing a short-term treatment of 1-3 seconds on the surface of the urea particles. High-energy particle bombardment removes residual impurities on the surface, while introducing polar functional groups such as hydroxyl and carboxyl groups on the surface and constructing a nanoscale micro-rough structure. The output shaft of the drive motor 144 drives the transmission pipe 145 to rotate, which in turn drives the stirring pipe 148 to rotate, breaking up the urea particles and ensuring uniform gas distribution, thus preventing condensed urea particles from flowing into the coating machine 6.

[0039] like Figure 4 As shown, in some embodiments, the dust collection mechanism 15 includes an air filter 151, a dust collection pipe 152, a dust collection hood 153, and a fan 154. The air filter 151 is installed on the right side of the conical hopper 9. The dust collection pipe 152 is installed on the air inlet of the air filter 151, and the dust collection pipe 152 passes through the conical hopper 9 and is inserted into the coating machine 6. The dust collection hood 153 is evenly installed on the lower surface of the dust collection pipe 152, and the fan 154 is installed on the air outlet of the air filter 151.

[0040] In this embodiment, the fan 154 draws air from the air filter 151, which in turn draws air from the dust collection pipe 152, which in turn draws air from the dust collection hood 153. The dust collection hood 153 draws the dust from the coating machine 6 and the conical hopper 9 into the air filter 151, effectively preventing dust from scattering and making the work site cleaner.

[0041] A method for achieving enhanced urea production includes the following steps: S1. Material Distribution and Buffering: A guide hopper 1 is installed at the end of the conveyor belt of the original urea granule production line, where a granule curtain is formed. A diversion mechanism 2 is inserted into the right side wall of the guide hopper 1. The chute 201 uses the weight of the urea granules to naturally receive a portion of the falling granules and guide them to an independently set buffer bin 3. The capacity of the buffer bin 3 is preferably 2 tons to ensure the stability of subsequent metering. When the buffer bin 3 is full, the granule flow guided in the diversion mechanism 2 is in a full state, and subsequent granules can no longer enter the diversion mechanism 2, thus automatically overflowing and falling back to the original urea granule packaging line. When the buffer bin 3 needs to be replenished, the granules automatically flow in through the diversion mechanism 2. This process is achieved entirely by the gravity and flow characteristics of the material, without the need for any valve switching or power equipment. Furthermore, the vibration function of the diversion mechanism 2 is added to make it less likely for urea granules to bridge, agglomerate, or block in the chute 201. S2, Metering and conveying: Metering belt scale 501 is connected to the discharge valve 4 below the buffer bin 3. According to the precise feeding amount required for the production ratio of enhanced urea, the urea granules are conveyed to the elevator 502, and then sent into the surface treatment mechanism 14 via the belt conveyor 503. S3. Surface treatment: Urea particles fall into the guide channel 13 and are broken by the surface treatment mechanism 14 to prevent them from clumping in the coating machine 6. The surface treatment mechanism 14 also activates the outer surface of the urea particles to improve the adhesion of the outer surface of the urea particles, making it difficult for solid or liquid agents to fall off the urea particles. S4. Mixing and coating: In the coating machine 6, the urea particles from step 2 are fully mixed with the additive. The additive is in liquid form and is precisely added to the coating machine 6 through the spraying mechanism 8; or it can be a powdered solid additive, which is quantitatively added to the coating machine 6 through the powder screw conveyor 7. The coating machine 6 stirs the urea particles to make the surface of the additive uniformly coated. S5. Detection and collection: The urea particles coated by the coating machine 6 are scanned by the monitoring mechanism 10. The content and distribution uniformity of the surface synergistic components of each batch of urea particles are analyzed. The analysis data is transmitted to the control system in real time and then collected by the finished product silo 11. The urea particles in the finished product silo 11 are dried by the drying mechanism 12. Without causing the urea particles to melt, the moisture in the agent on the surface of the urea particles is quickly evaporated or the chemical reaction is promoted to form a film. S6. Finished Product Packaging: After the coating is completed, the enhanced urea granules are sent into the enhanced urea finished product silo 11 via the conveyor belt on the lower side of the finished product silo 11 for weighing and packaging.

[0042] The working principle and usage process of this invention are as follows: A guide bucket 1 is installed at the end of the conveyor belt of the original urea granule production line, where a granule curtain is formed. A diversion mechanism 2 is inserted into the right side wall of the guide bucket 1. Utilizing the weight of the urea granules, the guide plate 204 guides the urea granules falling into the guide bucket 1 through the rectangular opening 203 into the chute 201, and then into the buffer bin 3. When the chute 201 is full, the urea granules flow out along the original route. During use, the upper and lower corrugated pipes 202 increase the extensibility of the middle chute 201. The front and rear vibration motors 205 can drive the chute 201 to vibrate, thereby preventing the urea granules in the chute 201 from agglomerating, bridging, or clogging, ensuring smooth urea flow. When the buffer bin 3 is full, the granule flow guided by the diversion mechanism 2 reaches a full state, and subsequent granules can no longer enter the diversion mechanism 2, thus automatically overflowing and falling back. In the original urea granule packaging line, when the buffer bin 3 needs replenishment, the granules automatically flow in through the diversion mechanism 2. This process relies entirely on the material's gravity and flow characteristics, requiring no valve switching or power equipment. The discharge valve 4 below the buffer bin 3 is connected to the conveying mechanism 5, which allows the metering belt scale 501 to convey the urea granules to the elevator 502 according to the precise feeding amount required for the urea production ratio. Then, the urea granules are sent to the surface treatment mechanism 14 via the belt conveyor 503. In the surface treatment mechanism 14, the plasma electrode 141 discharges through the surface treatment mechanism 14. External oxygen-argon gas flows into the gas distribution box 142 through the gas inlet pipe 143. The gas in the gas distribution box 142 flows into the transmission pipe 145 through the gas inlet 147, and then into the stirring pipe 148 through the transmission pipe 145. Finally, it is blown out through the gas outlet 149 on the stirring pipe 148. The external oxygen-argon gas mixes and contacts the discharge plasma, performing 1-3 treatments on the surface of the urea granules. The process involves a short time of seconds, during which high-energy particles bombard the surface to remove residual impurities. Simultaneously, polar functional groups such as hydroxyl and carboxyl groups are introduced onto the surface, constructing a nanoscale micro-rough structure. The output shaft of the drive motor 144 rotates the transmission tube 145, which in turn rotates the stirring tube 148, breaking down the urea particles and ensuring uniform gas distribution. This prevents condensed urea particles from flowing into the coating machine 6. The urea particles flow into the coating machine 6 through the guide channel 13. The urea particles from step 2 are thoroughly mixed with the additive, which is in liquid form. The temperature of the liquid agent in the storage tank 801 is adjusted by the steam heat exchange component 802 and the temperature control component 807 in the spraying mechanism 8. The liquid agent is then pumped into the atomizing nozzle assembly 806 via the pump body 804 and the conduit 803. The liquid agent is then evenly sprayed into the coating machine 6 through the atomizing nozzle assembly 806.Alternatively, a powdered solid additive can be added quantitatively to the coating machine 6 via a powder-coating screw conveyor 7. The coating machine 6 stirs the urea particles to uniformly coat them with the additive. The coated urea particles then flow into a conical hopper 9. A hyperspectral imaging detector 103 in the monitoring mechanism 10 captures images of the coated urea particles flowing into the conical hopper 9 and sends the information back to the controller 101 to analyze the content and uniformity of the surface-enhancing components. If the processing module in the controller 101 detects poor coating results, it triggers an alarm 102 to alert on-site personnel. Alternatively, the controller 101 can send feedback to the back-end server via its internal wireless communication module to remind back-end supervisors. During this process, a fan 154 in the dust collection mechanism 15 draws air from the air filter 151, which in turn draws air from the dust collection pipe 152, which in turn draws air from the dust collection hood 153. The dust collection hood 153 then connects the coating machine 6 with the dust collection pipe 152. Dust inside the conical hopper 9 is drawn into the air filter 151, effectively preventing dust dispersion and making the work site cleaner. Urea particles inside the conical hopper 9 flow into the finished product silo 11 for collection. Utilizing the large amount of low-grade waste heat generated during urea granulation (such as 40-60℃ humid hot air recovered from the top of the granulation tower or the tail gas), the recovered waste heat is purified by the filter and then blown into the air distribution pipe 121 in the drying mechanism 12 at a low speed and uniformly. It then flows into the branch pipe 122 through the air distribution pipe 121 and into the finished product silo 11 through the one-way air outlet 123 on the branch pipe 122. This system can precisely control the hot air temperature and flow rate, and without causing the urea particles to melt (urea melting point is about 143℃), it can quickly evaporate the moisture in the agent on the particle surface or promote the chemical reaction to form a film. It has high production flexibility. On the other hand, it creatively utilizes the physical properties of urea particles, which have good fluidity, saving the investment cost of adding trousers and belt conveyors. It also saves the space occupied by the equipment layout and in the process of diversion. ;

[0043] In summary, this method for improving urea production efficiency allows for the addition of both solid and liquid additives, offering high production flexibility. Furthermore, it creatively utilizes the physical properties of urea granules, which exhibit good flowability. The diversion mechanism 2 distributes the urea, and when the buffer bin 3 is full, the urea granules overflow through the diversion mechanism 2 back to the original system for conventional urea packaging. When the buffer bin 3 is low, the urea granules are automatically replenished via the chute 201, saving on investment costs associated with adding conveyor belts and other equipment, as well as reducing the space required for equipment layout. It also enhances the activation function on the urea granule surface, improving the adhesion between the urea granules and the additive, and adds a crushing function to the urea granules entering the coating machine 6, ensuring uniform coating. The coating detection function facilitates timely problem identification, and the drying function after coating allows for rapid curing of the coating film, preventing moisture absorption and clumping, thus improving usability.

[0044] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A method for achieving enhanced urea production, characterized in that: Includes the following steps: S1, Material Distribution and Buffering: A guide bucket (1) is set at the end of the granule curtain formed by the material discharge at the end of the belt conveyor of the original urea granule production line. A diversion mechanism (2) is inserted into the right side wall of the guide bucket (1). The chute (201) uses the weight of the urea granules to naturally receive a portion of the falling granules and guide them to an independently set buffer bin (3). The capacity of the buffer bin (3) is preferably 2 tons to ensure the stability of subsequent metering. When the buffer bin (3) is full, the granule flow guided in the diversion mechanism (2) forms a full state, and subsequent granules cannot enter the diversion mechanism (2) again, so they automatically overflow and fall back to the original urea granule packaging line. When the buffer bin (3) needs to be replenished, the granules automatically flow in through the diversion mechanism (2). This process is achieved entirely by the gravity and flow characteristics of the material, without any valve switching or power equipment. In addition, the vibration function of the diversion mechanism (2) is increased, so that the urea granules are not easy to bridge, condense or block in the chute (201). S2, Metering and conveying: Metering belt scale (501) is connected to the discharge valve (4) below the buffer bin (3). According to the precise feeding amount required for the production ratio of enhanced urea, the urea particles are conveyed to the elevator (502) and then sent to the surface treatment mechanism (14) via the belt conveyor (503). S3, Surface treatment: Urea particles fall into the guide channel (13) and are broken by the surface treatment mechanism (14) to prevent the urea particles from clumping in the coating machine (6). The surface treatment mechanism (14) also activates the outer surface of the urea particles to improve the adhesion of the outer surface of the urea particles, making it difficult for solid or liquid agents to fall off the urea particles. S4, Mixed coating: In the coating machine (6), the urea particles from step 2 are fully mixed with the additive. The additive is in liquid form and is precisely added to the coating machine (6) through the spraying mechanism (8); or it can be a powdered solid additive, which is quantitatively added to the coating machine (6) through the powder screw conveyor (7). The coating machine (6) stirs the urea particles to make the surface of the additive uniformly coated. S5. Detection and collection: The urea particles coated by the coating machine (6) are scanned by the monitoring agency (10). The content and distribution uniformity of the surface enhancement components of each batch of urea particles are analyzed. The analysis data is transmitted to the control system in real time and then collected by the finished product warehouse (11). The urea particles in the finished product warehouse (11) are dried by the drying agency (12). Without causing the urea particles to melt, the moisture in the agent on the surface of the urea particles is quickly evaporated or the chemical reaction is promoted to form a film. In addition, the dust in the coating machine (6) is collected by the dust collection agency (15) during the process, so that the on-site environment is cleaner. S6. Finished product packaging: After the coating is completed, the enhanced urea granules are sent to the enhanced urea finished product warehouse (11) through the conveyor belt on the lower side of the finished product warehouse (11) for weighing and packaging.

2. The method for achieving enhanced urea production according to claim 1, characterized in that: A diversion mechanism (2) is installed on the right side of the diversion hopper (1). A buffer chamber (3) is set at the corresponding position of the lower port of the diversion mechanism (2). A discharge valve (4) is set on the lower surface of the buffer chamber (3). A conveying mechanism (5) is set on the lower side of the discharge valve (4). A surface treatment mechanism (14) is set at the lower position of the right end of the conveying mechanism (5). The discharge port of the surface treatment mechanism (14) is set in correspondence with the inlet of the coating machine (6). A powder-spraying screw conveyor (7) is set at the corresponding position on the upper side of the conveying mechanism (5). A spraying mechanism (8) is set on the coating machine (6). A conical hopper (9) is set on the right side of the coating machine (6). A monitoring mechanism (10) and a dust collection mechanism (15) are installed on the side wall of the conical hopper (9). A finished product hopper (11) is set at the corresponding position of the discharge port on the lower surface of the conical hopper (9). A drying mechanism (12) is set at the lower edge of the side wall of the finished product hopper (11).

3. The method for achieving enhanced urea production according to claim 2, characterized in that: The diversion mechanism (2) includes a chute (201), a corrugated pipe (202), a rectangular opening (203), a guide plate (204), and a vibration motor (205). The upper and lower ends of the chute (201) are fixedly installed with corrugated pipes (202), and the upper and lower corrugated pipes (202) are respectively connected to the right side wall of the guide bucket (1) and the upper side wall of the buffer chamber (3). A rectangular opening (203) is opened on the right side wall of the guide bucket (1) corresponding to the chute (201). A guide plate (204) is fixedly installed between the front and rear inner walls of the guide bucket (1) corresponding to the lower side wall of the rectangular opening (203). A vibration motor (205) is fixedly installed on the front and rear sides of the chute (201). The inclination angle of the guide plate (204) is 45-60 degrees, and the left and right length of the guide plate (204) is two-thirds of the left and right length of the guide bucket (1).

4. The method for achieving enhanced urea production according to claim 2, characterized in that: The conveying mechanism (5) includes a metering belt scale (501), an elevator (502) and a belt conveyor (503). The metering belt scale (501) is located below the discharge valve (4). The elevator (502) is located on the right side of the metering belt scale (501). The belt conveyor (503) is located at the right outlet of the elevator (502). The right outlet of the belt conveyor (503) is located corresponding to the feed inlet of the coating machine (6).

5. The method for achieving enhanced urea production according to claim 2, characterized in that: The spraying mechanism (8) includes a liquid storage tank (801), a steam heat exchange component (802), a conduit (803), a pump body (804), an electric flow meter (805), an atomizing nozzle assembly (806), and a temperature control component (807). The liquid storage tank (801) is equipped with a steam heat exchange component (802) and a temperature control component (807). A conduit (803) is installed on the outlet of the liquid storage tank (801), and the pump body (804) and the electric flow meter (805) are connected in series in the conduit (803). An atomizing nozzle assembly (806) is installed on the outlet of the conduit (803), and the atomizing nozzle assembly (806) is located inside the coating machine (6).

6. The method for achieving enhanced urea production according to claim 2, characterized in that: The monitoring mechanism (10) includes a controller (101), an alarm (102) and a hyperspectral imaging detector (103). The controller (101) is installed on the right side of the conical bucket (9), and the alarm (102) is installed on the controller (101). The hyperspectral imaging detector (103) is installed on the upper inner wall of the conical bucket (9), and the hyperspectral imaging detector (103) is set in a corresponding manner to the outlet of the coating machine (6).

7. A method for achieving enhanced urea production according to claim 2, characterized in that: The drying mechanism (12) includes an air distribution pipe (121), a branch pipe (122), and a one-way air outlet (123). The air distribution pipe (121) is fixedly installed on the lower right side of the finished product silo (11). The branch pipe (122) is evenly installed on the front and back of the left side of the air distribution pipe (121), and the branch pipe (122) is inserted into the finished product silo (11). The one-way air outlet (123) is evenly distributed on the front and back sides of the branch pipe (122).

8. A method for achieving enhanced urea production according to claim 7, characterized in that: The front-to-back spacing of the branch pipe (122) is 5-10cm.

9. A method for achieving enhanced urea production according to claim 2, characterized in that: The surface treatment mechanism (14) includes a plasma electrode (141), an air distribution box (142), an air inlet pipe (143), a drive motor (144), a transmission pipe (145), a mechanical seal (146), an air inlet (147), a stirring pipe (148), and an air outlet (149). The plasma electrode (141) is embedded in the upper side wall of the guide groove (13). The air distribution box (142) is fixedly installed on the rear side of the guide groove (13). The air inlet pipe (143) is fixedly installed on the left side of the air distribution box (142). The rear side of the air distribution box (142) is fixedly installed on the upper side wall of the guide groove (13). A drive motor (144) is provided with a transmission pipe (145) fixedly installed in front of the output shaft of the drive motor (144). The transmission pipe (145) is inserted into the guide groove (13), and mechanical seals (146) are provided on the front and rear side walls of the air distribution box (142) corresponding to the transmission pipe (145). An air inlet (147) is provided on the side wall of the transmission pipe (145) located in the air distribution box (142). A stirring pipe (148) is uniformly installed on the outer surface of the transmission pipe (145) located in the guide groove (13). An air outlet (149) is uniformly provided on the stirring pipe (148).

10. A method for achieving enhanced urea production according to claim 2, characterized in that: The dust collection mechanism (15) includes an air filter (151), a dust collection pipe (152), a dust collection hood (153), and a fan (154). The air filter (151) is installed on the right side of the conical bucket (9). The air inlet of the air filter (151) is equipped with a dust collection pipe (152), and the dust collection pipe (152) passes through the conical bucket (9) and is inserted into the coating machine (6). The lower surface of the dust collection pipe (152) is uniformly equipped with a dust collection hood (153), and the air outlet of the air filter (151) is equipped with a fan (154).

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