A novel urea raw material purification device and method

Abstract

This invention relates to the field of urea raw material purification technology, specifically a novel urea raw material purification device and method. The device includes an upper shell, a cleaning mechanism, a washing and drying mechanism, and a circulating filtration mechanism. A lower shell is fixedly connected to the bottom of the upper shell, and a feed inlet is connected to one end of the upper shell. The cleaning mechanism is located inside the upper shell for cleaning the screening plate. The washing and drying mechanism is located inside the lower shell for washing and drying the urea raw material. The circulating filtration mechanism is located inside the lower shell for filtering and circulating the clean water after washing the urea raw material. This device is not only simple and convenient to operate, but also can fully screen and wash the urea raw material, thereby improving the purity of the urea raw material and thus improving the purity of the produced urea. This eliminates the need for users to perform further purification work, thereby reducing the user's production cycle and production costs.

Description

Technical Field

[0001] This invention relates to the field of urea raw material purification technology, specifically to a novel urea raw material purification device and method. Background Technology

[0002] During the initial raw material acquisition process for urea production, solid impurities may be present. For example, when producing urea from coal, the syngas produced after coal combustion or gasification may carry solid particles such as coal slag. If these solid particles are not effectively purified, they will enter the subsequent urea synthesis process. When producing urea from natural gas, although natural gas itself is gaseous, a small amount of solid impurities, such as rust and dust from pipelines, may be mixed in during its transportation and pretreatment. These impurities will enter the urea synthesis unit along with the raw gas. In addition, some auxiliary raw materials used in the urea production process, such as catalyst supports, may be in solid form. If these solid substances are broken or worn during the reaction, they may also exist in the raw materials as solid impurities. In some urea production processes, solid urea may be used as a raw material for further processing. For example, when producing high-purity automotive urea, industrial-grade solid urea may be used for purification. In this case, solid urea, as the main raw material, needs to undergo a series of operations such as dissolution and purification to remove impurities and meet the quality requirements of automotive urea.

[0003] Currently, some existing urea raw material purification devices are not achieving ideal purification results, leading to lower purity of urea produced subsequently. This necessitates multiple purification processes, resulting in longer production cycles and increased costs for users. Summary of the Invention

[0004] The purpose of this invention is to provide a novel urea raw material purification device and method to solve the problem mentioned in the background art that some existing urea raw material purification devices do not achieve ideal purification results, leading to low purity of subsequently produced urea and requiring multiple purification processes, resulting in longer production cycles and increased costs for users. This solution is not only simple and convenient to operate, but also can fully screen and clean urea raw materials, thereby improving the purity of urea raw materials and thus improving the purity of produced urea. This eliminates the need for users to perform further purification work, thereby reducing the user's production cycle and production costs.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a novel urea raw material purification device and method, the device comprising an upper shell, a cleaning mechanism, a washing and drying mechanism, and a circulating filtration mechanism. A lower shell is fixedly connected to the bottom of the upper shell. An inlet is connected to one end of the upper shell. A screening box is installed inside the upper shell, and the screening box is inclined. Two sets of screening plates are uniformly fixedly connected inside the screening box. Three sets of discharge nozzles are connected to the bottom of the screening box, and all discharge nozzles are inclined. The upper end of the screening box is connected to the inlet via a rubber ring. The bottom end of the screening box... The upper housing is equipped with a vibration motor. Guide sleeves are uniformly fixedly connected to the inner wall of the upper housing. Guide rods are uniformly fixedly connected to both sides of the screening box, and one end of each guide rod is slidably connected to the guide sleeve. A spring is fixedly connected to one end of each guide rod, and one end of each spring is fixedly connected to the inside of the screening box. A cleaning mechanism is provided inside the upper housing for cleaning the screening plate. A washing and drying mechanism is provided inside the lower housing for washing and drying the urea raw material. A circulating filtration mechanism is provided inside the lower housing for filtering and circulating the clean water after washing the urea raw material.

[0006] Preferably, the cleaning mechanism includes a high-pressure blower, a sealing plate, a connecting rod, and an electric actuator. The high-pressure blower is located at the bottom of the upper housing, and its output end is connected to the bottom of the screening box via a flexible hose. One end of each discharge nozzle is connected to a sealing plate via a rotating shaft, and one end of each sealing plate is fixedly connected to a connecting rod. One end of each discharge nozzle is connected to an electric actuator via a rotating shaft, and the output end of each electric actuator is connected to one end of a connecting rod via a rotating shaft. This facilitates cleaning of the screening plate, avoids reducing the screening effect of the screening plate, and ensures that impurities in the raw materials are removed.

[0007] Preferably, the control terminals of the vibration motor, high-pressure fan, and electric actuator are all electrically connected to an external power source via an external switch, which facilitates the operation of the device.

[0008] Preferably, the cleaning and drying mechanism includes a guide pipe, a cleaning box, a lifting bucket, a spiral pusher, a first motor, a stirring plate, a second motor, a drying box, a hot air blower, a hot air duct, a baffle plate, and a discharge plate. The cleaning box is fixedly connected to one end of the lower housing. The guide pipe is connected to the top of the cleaning box, and the top of the guide pipe is connected to the upper housing. One end of the discharge nozzle is located inside the guide pipe. The lifting bucket is located inside the lower housing, and its bottom end is connected to the bottom end of the cleaning box. A spiral pusher is connected to the inside of the lifting bucket via a bearing. The first motor is located at one end of the lifting bucket, and its output end is fixedly connected to one end of the spiral pusher. A stirring plate is connected to the inside of the cleaning box via a bearing. A [further details about the cleaning box are missing]. The system includes a second motor, the output of which is fixedly connected to one end of a stirring plate. A drying chamber is located in the middle of the lower housing, and a hot air blower is installed at the top of the drying chamber. The output of the hot air blower is connected to three sets of hot air pipes, the bottom ends of which are all connected to the bottom of the drying chamber. Six sets of material-blocking air plates are evenly and fixedly connected inside the drying chamber, with adjacent sets of material-blocking air plates being symmetrically inclined. A material drop plate is fixedly connected to one end of the drying chamber, located on one side of the lowest set of material-blocking air plates. The material drop plate is inclined. A discharge port is opened at the top of the lifting bucket, located at the top of the drying chamber. One end of the lifting bucket is connected to the drying chamber, facilitating the user's cleaning and drying of raw materials and further improving the purity of the raw materials.

[0009] Preferably, the control terminals of the first motor, the second motor, and the hot air blower are all electrically connected to an external power source via an external switch, which facilitates the operation of this device.

[0010] Preferably, the middle part of the washing tank is a symmetrical inclined plane, and the connection between the washing tank and the lifting bucket is the lowest end of the washing tank, which facilitates the entry of the raw materials inside the washing tank into the lifting bucket. The inclination angle of the stirring plate is the same as that of one side of the washing tank, and the lifting bucket is inclined. The inclination angle and direction of the lifting bucket and the stirring plate are the same, which facilitates the transfer of materials through the lifting bucket.

[0011] Preferably, the circulating filtration mechanism includes a clean water tank, a wastewater tank, a purification tank, a drain pipe, a solenoid valve, a water supply pipe, a feeding plate, a stirrer, a first connecting pipe, a first water pump, a second connecting pipe, a second water pump, a third connecting pipe, a third water pump, and a fourth connecting pipe. The clean water tank is located inside the lower housing. A wastewater tank is located on one side of the clean water tank. A purification tank is located on one side of the lower housing, and the purification tank is located on the side of the discharge port. A drain pipe is connected to the bottom of the purification tank, with one end of the drain pipe located outside the lower housing. A solenoid valve is located in the middle of the drain pipe. A water supply pipe is connected to the top of the purification tank. A feeding plate is connected to the top of the purification tank, and the feeding plate is located above the water supply pipe. A stirrer is located inside the purification tank. The top of the device is located outside the purification tank. The top of the purification tank is connected to a first connecting pipe, and one end of the first connecting pipe is located at the bottom of the wastewater tank. A first water pump is installed in the middle of the first connecting pipe. One end of the cleaning tank is connected to a second connecting pipe, and one end of the second connecting pipe is located at the bottom of the clean water tank. A second water pump is installed in the middle of the second connecting pipe. The bottom of the lifting tank is connected to a third connecting pipe, and one end of the third connecting pipe is connected to the wastewater tank. A third water pump is installed in the middle of the third connecting pipe. The lower middle part of the purification tank is connected to a fourth connecting pipe, and one end of the fourth connecting pipe is connected to the clean water tank. A fourth water pump is installed in the middle of the fourth connecting pipe. This system can ensure the cleanliness of the raw materials and maximize the purity of the raw materials.

[0012] Preferably, the control terminals of the solenoid valve, stirrer, first water pump, second water pump, third water pump, and fourth water pump are all electrically connected to an external power supply via an external switch, which facilitates the operation of this device.

[0013] The operating method of this device is as follows:

[0014] Step 1: Screening. The raw material is poured into the feed inlet. At this time, the vibrating motor drives the screening box and screening plates to vibrate. The vibrating screening plates can screen the raw material and discharge impurities through the discharge nozzle. The upper set of screening plates can screen out large particles of impurities in the raw material, and the lower set can screen out small particles of impurities. The raw material is discharged through the discharge nozzle between the two sets of screening plates and enters the discharge nozzle through the guide pipe.

[0015] Step 2: Cleaning. After running for a period of time, some particles will clog the inside of the screening plate. At this time, the electric push rod and connecting rod can make the sealing plate block the discharge nozzle. The high-pressure blower can discharge high-pressure air to the bottom of the screening box. Under the action of air pressure, the particles that clog the screening plate can be pushed upward, thereby cleaning the screening plate.

[0016] Step 3: Cleaning. After screening, the raw materials enter the cleaning tank through the feed pipe. The second motor and the stirring plate can clean the raw materials in the cleaning tank and wash away the dust on their surface.

[0017] Step 4: Drying. After cleaning, the raw materials enter the lifting bucket and are conveyed into the drying chamber by the first motor, the screw pusher, and the discharge port. Multiple sets of inclined and symmetrical baffles slow down the passage of the raw materials. When the raw materials pass through the baffles, the high-temperature air generated by the hot air blower enters the drying chamber through the hot air pipe, thereby drying the raw materials. The raw materials continue to slide down through the baffles and are finally discharged from the device through the discharge plate.

[0018] Step 5: Circulation. The clean water from the purification tank is slowly transported to the cleaning tank via the second connecting pipe and the second water pump. Simultaneously, wastewater from the cleaning tank and the lifting tank is transported to the wastewater tank for storage via the third connecting pipe and the third water pump. The purified water from the purification tank is transported to the purification tank via the fourth connecting pipe and the fourth water pump. All wastewater from the wastewater tank is transported to the purification tank via the first connecting pipe and the first water pump. The user then adds alum and activated carbon to the purification tank via the feeding plate. The agitator thoroughly mixes these with the wastewater. After mixing, the mixture is allowed to settle, allowing small particles in the wastewater to clump together and settle to the bottom of the purification tank. When the user needs to add purified water from the purification tank to the purification tank, the solenoid valve is opened to discharge the sediment at the bottom of the purification tank through the drain pipe. The user can then replenish the purification tank with clean water via the water supply pipe.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] When the user starts the entire device and pours the raw material into the feed inlet, the vibrating motor drives the screening box to vibrate. The screening box continuously stretches and compresses the springs via guide rods, ensuring that the screening box is in a vibrating state. The vibrating screening plates can screen the raw material, discharging impurities through the discharge nozzle. The upper set of screening plates can screen out large particles of impurities, while the lower set can screen out small particles. The raw material is discharged through the discharge nozzle between the two sets of screening plates and enters the discharge nozzle through the guide pipe. After running for a period of time, some particles will clog the inside of the screening plates. At this time, the electric push rod and connecting rod can rotate the sealing plate, which can block the discharge nozzle. Then, the high-pressure blower can... High-pressure air is discharged to the bottom of the screening box, causing it to rise through the screening plate and finally exit through the feed inlet. The air pressure pushes upwards the particles clogging the screening plate, cleaning it and preventing a reduction in screening efficiency. This ensures the removal of impurities from the raw materials. The screened material enters the washing box through the guide pipe. A second motor drives a stirring plate, which agitates the water inside the washing box and simultaneously stirs the raw material. The second motor then washes the material, removing surface dust. The washed material enters the lifting hopper, where a first motor and a screw conveyor transport it to the discharge port, from which it enters the drying chamber. The material continuously slides down the baffle plate and is finally discharged from the device through the discharge plate. Multiple sets of inclined and symmetrical baffle plates slow down the material's passage time, ensuring thorough drying. As the material passes through the baffle plate, high-temperature air generated by the hot air blower enters the drying chamber through the hot air pipe, creating a high-temperature environment inside the drying chamber to dry the material. A second connecting pipe and a second water pump slowly transport clean water from the clean water tank to the washing tank. Simultaneously, wastewater from the washing tank and the lifting tank is transported to the wastewater tank for storage via a third connecting pipe and a third water pump. When the clean water tank is full, the wastewater tank is also full. A fourth connecting pipe and a fourth water pump then drain the wastewater from the clean water tank. The purified water is delivered to the purification tank. Through the first connecting pipe and the first water pump, all the wastewater in the wastewater tank is transferred to the purification tank. Then, the user adds alum and activated carbon to the purification tank via the feeding plate. A stirrer thoroughly mixes them with the wastewater. After mixing, the mixture is allowed to settle, causing small particles in the wastewater to clump together and settle to the bottom of the purification tank. When the user needs to add purified water from the purification tank to the purification tank, the solenoid valve is opened to discharge the sediment at the bottom of the purification tank through the drain pipe. The user can then replenish the purification tank with clean water through the water supply pipe, ensuring normal internal water circulation. This device is not only simple and convenient to operate, but also effectively screens and cleans urea raw materials.This improves the purity of urea raw materials, thereby increasing the purity of produced urea. Users no longer need to perform purification work, thus reducing production cycles and costs. Attached Figure Description

[0021] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0022] Figure 2 This is a cross-sectional perspective view of the present invention;

[0023] Figure 3 This is a three-dimensional cross-sectional view of the upper shell, screening box, and screening plate in this invention;

[0024] Figure 4 This is a three-dimensional schematic diagram of the connecting rod and the electric actuator in this invention;

[0025] Figure 5 This is a three-dimensional cross-sectional view of the cleaning box, the lifting tank, and the drying box in this invention;

[0026] Figure 6 This is a three-dimensional cross-sectional view of the drying oven and the baffle plate in this invention;

[0027] Figure 7 This is a three-dimensional schematic diagram of the circulating filtration mechanism in this invention.

[0028] In the diagram: 1. Upper shell; 2. Feed inlet; 3. Lower shell; 4. Screening box; 5. Screening plate; 6. Discharge nozzle; 7. Vibrating motor; 8. High-pressure blower; 9. Guide sleeve; 10. Guide rod; 11. Spring; 12. Sealing plate; 13. Connecting rod; 14. Electric actuator; 15. Feed guide pipe; 16. Cleaning box; 17. Lifting bucket; 18. Spiral pusher rod; 19. First motor; 20. Mixing plate; 21. Second motor; 22. Drying oven; 23. Heat... 24. Fan; 25. Hot air duct; 26. Material baffle plate; 27. Material discharge plate; 28. Discharge port; 29. ​​Clean water tank; 30. Wastewater tank; 31. Purification tank; 32. Sewage pipe; 33. Solenoid valve; 34. Water supply pipe; 35. Feeding plate; 36. Agitator; 37. First connecting pipe; 38. First water pump; 39. Second connecting pipe; 40. Third connecting pipe; 41. Third water pump; 42. Fourth connecting pipe; 43. Fourth water pump. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. 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.

[0030] Please see Figures 1-7 One embodiment provided by the present invention:

[0031] A novel urea raw material purification device and method are disclosed. The device includes an upper shell 1, a cleaning mechanism, a washing and drying mechanism, and a circulating filtration mechanism. A lower shell 3 is fixedly connected to the bottom of the upper shell 1. A feed inlet 2 is connected to one end of the upper shell 1. A screening box 4 is installed inside the upper shell 1, and the screening box 4 is inclined. Two sets of screening plates 5 are evenly fixedly connected inside the screening box 4. Three sets of discharge nozzles 6 are connected to the bottom of the screening box 4, and all discharge nozzles 6 are inclined. The upper end of the screening box 4 is connected to the feed inlet 2 through a rubber ring. A vibration motor 7 is installed at the bottom of the screening box 4. The inner wall of the screening box 4 is uniformly and fixedly connected with guide sleeves 9. Guide rods 10 are uniformly and fixedly connected to both sides of the screening box 4. One end of each guide rod 10 is slidably connected to the guide sleeve 9. One end of each guide rod 10 is fixedly connected to a spring 11. One end of each spring 11 is fixedly connected to the inside of the screening box 4. The upper shell 1 is equipped with a cleaning mechanism for cleaning the screening plate 5. The lower shell 3 is equipped with a cleaning and drying mechanism for cleaning and drying the urea raw material. The lower shell 3 is equipped with a circulating filtration mechanism for filtering and circulating the clean water after cleaning the urea raw material.

[0032] Please see Figures 2-4 In this embodiment, the cleaning mechanism includes a high-pressure blower 8, a sealing plate 12, a connecting rod 13, and an electric pusher 14. The high-pressure blower 8 is located at the bottom of the upper housing 1, and its output end is connected to the bottom of the screening box 4 via a flexible hose. One end of each discharge nozzle 6 is connected to the sealing plate 12 via a rotating shaft, and one end of each sealing plate 12 is fixedly connected to the connecting rod 13. One end of each discharge nozzle 6 is connected to the electric pusher 14 via a rotating shaft, and the output end of each electric pusher 14 is connected to one end of the connecting rod 13 via a rotating shaft. After running for a period of time, some particles will clog the inside of the screening plate 5. At this time... The sealing plate 12 can be rotated by the electric actuator 14 and the connecting rod 13, which can block the discharge nozzle 6. At this time, the high-pressure blower 8 can discharge high-pressure air to the bottom of the screening box 4, so that the air is discharged upward through the screening plate 5 and finally discharged through the feed port 2. Under the action of air pressure, the particles blocked by the screening plate 5 can be pushed upward, thereby cleaning the screening plate 5, avoiding reducing the screening effect of the screening plate 5, ensuring that impurities in the raw materials are removed, and facilitating the cleaning of the screening plate 5.

[0033] Please see Figure 2 , Figure 5 and Figure 6In this embodiment, the cleaning and drying mechanism includes a guide pipe 15, a cleaning box 16, a lifting bucket 17, a spiral pusher 18, a first motor 19, a stirring plate 20, a second motor 21, a drying box 22, a hot air blower 23, a hot air pipe 24, a baffle plate 25, and a discharge plate 26. The cleaning box 16 is fixedly connected to one end of the lower housing 3. The guide pipe 15 is connected to the top of the cleaning box 16, and the top of the guide pipe 15 is connected to the upper housing 1. One end of the discharge nozzle 6 is located inside the guide pipe 15. The lifting bucket 17 is located inside the lower housing 3, and the bottom of the lifting bucket 17 is connected to the bottom of the cleaning box 16. The spiral pusher 18 is connected to the inside of the lifting bucket 17 via bearings. A first motor 19 is installed at one end of the lifting hopper 17, and the output end of the first motor 19 is fixedly connected to one end of the spiral push rod 18. A stirring plate 20 is connected to the inside of the washing tank 16 via bearings. A second motor 21 is installed on one side of the washing tank 16, and the output end of the second motor 21 is fixedly connected to one end of the stirring plate 20. A drying chamber 22 is installed in the middle of the lower shell 3. A hot air blower 23 is installed at the top of the drying chamber 22. The output end of the hot air blower 23 is connected to three sets of hot air pipes 24, and the bottom ends of all the hot air pipes 24 are connected to the bottom of the drying chamber 22. Six sets of material-blocking air plates 25 are evenly fixedly connected inside the drying chamber 22, and adjacent sets of material-blocking air plates 25 are all opposite to each other. The drying chamber 22 is tilted, and a discharge plate 26 is fixedly connected to one end of the drying chamber 22. The discharge plate 26 is located on one side of the lowest set of material-blocking air plates 25. The discharge plate 26 is tilted. The top of the lifting bucket 17 has a discharge port 27, which is located at the top of the drying chamber 22. One end of the lifting bucket 17 is connected to the drying chamber 22. After screening, the raw materials enter the washing chamber 16 through the guide pipe 15. The second motor 21 drives the stirring plate 20 to rotate, which stirs the clean water inside the washing chamber 16 and also stirs the raw materials. Thus, the second motor 21 can clean the raw materials in the washing chamber 16, washing away the dust on their surface. After cleaning... The raw material enters the lifting bucket 17, and is conveyed to the discharge port 27 by the first motor 19 and the spiral pusher 18. It then enters the drying chamber 22 through the discharge port 27. The raw material slides down through the baffle plate 25 and is finally discharged from the device through the drop plate 26. The multiple sets of inclined and symmetrical baffle plates 25 can delay the passage time of the raw material and ensure that the raw material is fully dried. When the raw material passes through the baffle plate 25, the high temperature air generated by the hot air blower 23 enters the drying chamber 22 through the hot air pipe 24, thereby making the interior of the drying chamber 22 high temperature, which can dry the raw material. This makes it convenient for users to clean and dry the raw material and further improve the purity of the raw material.

[0034] Please see Figure 2 , Figure 5 and Figure 7In this embodiment, the circulating filtration mechanism includes a clean water tank 28, a wastewater tank 29, a purification tank 30, a drain pipe 31, a solenoid valve 32, a water supply pipe 33, a feeding plate 34, a stirrer 35, a first connecting pipe 36, a first water pump 37, a second connecting pipe 38, a second water pump 39, a third connecting pipe 40, a third water pump 41, and a fourth connecting pipe 42. The clean water tank 28 is located inside the lower housing 3. A wastewater tank 29 is located on one side of the clean water tank 28. A purification tank 30 is located on one side of the lower housing 3, and the purification tank 30 is located on one side of the discharge port 27. The bottom of the purification tank 30 is connected to the drain pipe 31, and one end of the drain pipe 31 is located outside the lower housing 3. A solenoid valve 32 is located in the middle of the drain pipe 31. The top of the purification tank 30 is connected to a water supply pipe 35. A water pipe 33 and a purification tank 30 are connected to a feeding plate 34 at the top, with the feeding plate 34 located at the top of the water supply pipe 33. A stirrer 35 is installed inside the purification tank 30, with its top located on the outside of the purification tank 30. A first connecting pipe 36 is connected to the top of the purification tank 30, with one end of the first connecting pipe 36 located at the bottom of the wastewater tank 29. A first water pump 37 is installed in the middle of the first connecting pipe 36. A second connecting pipe 38 is connected to one end of the cleaning tank 16, with one end of the second connecting pipe 38 located at the bottom of the clean water tank 28. A second water pump 39 is installed in the middle of the second connecting pipe 38. A third connecting pipe 40 is connected to the bottom of the lifting tank 17, with one end of the third connecting pipe 40 connected to the wastewater tank 29. The third connecting pipe 40... The unit is equipped with a third water pump 41. A fourth connecting pipe 42 is connected to the lower middle part of the purification tank 30, and one end of the fourth connecting pipe 42 is connected to the clean water tank 28. A fourth water pump 43 is installed in the middle of the fourth connecting pipe 42. Through the second connecting pipe 38 and the second water pump 39, the clean water inside the clean water tank 28 can be slowly transported to the inside of the cleaning tank 16. At the same time, the sewage inside the cleaning tank 16 and the lifting tank 17 can be transported to the inside of the sewage tank 29 for storage through the third connecting pipe 40 and the third water pump 41. When the clean water inside the clean water tank 28 has been transported out, the clean water inside the sewage tank 29 is also full. Through the fourth connecting pipe 42 and the fourth water pump 43, the purified clean water inside the purification tank 30 can be transported to the inside of the clean water tank 28. The wastewater inside the wastewater tank 29 can be completely transported to the purification tank 30 through the first connecting pipe 36 and the first water pump 37. Then, the user adds alum and activated carbon to the purification tank 30 through the feeding plate 34. The agitator 35 can fully mix them with the wastewater. After mixing, the mixture is allowed to stand, causing small particles in the wastewater to clump together and finally settle to the bottom of the purification tank 30. When the user needs to input the purified water from the purification tank 30 into the clean water tank 28, the solenoid valve 32 is first opened to discharge the impurities settled at the bottom of the purification tank 30 through the drain pipe 31. The user can then replenish clean water into the purification tank 30 through the water supply pipe 33 to ensure the normal internal circulation water volume and guarantee the cleanliness of the raw materials.To maximize the purity of raw materials;

[0035] It should be noted that the control terminals of the vibration motor 7, high-pressure blower 8, and electric actuator 14 are all electrically connected to an external power supply via external switches to facilitate the operation of this device. The control terminals of the first motor 19, second motor 21, and hot air blower 23 are also electrically connected to an external power supply via external switches to facilitate the operation of this device. The middle part of the cleaning tank 16 is symmetrically inclined, and the connection point between the cleaning tank 16 and the lifting bucket 17 is the lowest end of the cleaning tank 16, which facilitates the entry of the raw materials inside the cleaning tank 16 into the lifting bucket 17. The tilt angle of the stirring plate 20 is the same as that of one side of the cleaning tank 16. The lifting bucket 17 is tilted, and the tilt angle and direction of the lifting bucket 17 and the stirring plate 20 are the same, which facilitates the transfer of materials through the lifting bucket 17. The control terminals of the solenoid valve 32, stirrer 35, first water pump 37, second water pump 39, third water pump 41, and fourth water pump 43 are all electrically connected to an external power supply via external switches to facilitate the operation of this device.

[0036] The device operates as follows:

[0037] Step 1: Screening. The raw material is poured into the feed inlet 2. At this time, the vibrating motor 7 drives the screening box 4 and the screening plate 5 to vibrate. The vibrating screening plate 5 can screen the raw material and discharge impurities through the discharge nozzle 6. The upper set of screening plates 5 can screen out large particles of impurities in the raw material, and the lower set can screen out small particles of impurities. The raw material is discharged through the discharge nozzle 6 between the two sets of screening plates 5 and enters the interior of the discharge nozzle 6 through the guide pipe 15.

[0038] Step 2: Cleaning. After running for a period of time, some particles will clog the inside of the screening plate 5. At this time, the electric push rod 14 and the connecting rod 13 can make the sealing plate 12 block the discharge nozzle 6. The high-pressure blower 8 can discharge high-pressure air to the bottom of the screening box 4. Under the action of air pressure, the particles that clog the screening plate 5 can be pushed upward, thereby cleaning the screening plate 5.

[0039] Step 3: Cleaning. After screening, the raw materials enter the cleaning tank 16 through the feed pipe 15. The second motor 21 and the stirring plate 20 can clean the raw materials in the cleaning tank 16 and wash away the dust on their surface.

[0040] Step 4: Drying. The cleaned raw materials enter the lifting tank 17 and are conveyed to the inside of the drying chamber 22 by the first motor 19, the spiral pusher 18 and the discharge port 27. Multiple sets of inclined and symmetrical baffles 25 can delay the passage time of the raw materials. When the raw materials pass through the baffles 25, the high temperature air generated by the hot air blower 23 enters the inside of the drying chamber 22 through the hot air pipe 24, thereby drying the raw materials. The raw materials continue to slide down through the baffles 25 and are finally discharged from the device through the discharge plate 26.

[0041] Step 5: Circulation. Clean water from the purified water tank 28 is slowly transported to the cleaning tank 16 via the second connecting pipe 38 and the second water pump 39. Simultaneously, wastewater from the cleaning tank 16 and the lifting tank 17 is transported to the wastewater tank 29 for storage via the third connecting pipe 40 and the third water pump 41. Purified water from the purification tank 30 is transported to the purified water tank 28 via the fourth connecting pipe 42 and the fourth water pump 43. All wastewater from the wastewater tank 29 is transported to the purified water tank 28 via the first connecting pipe 36 and the first water pump 37. Inside the purification tank 30, the user adds alum and activated carbon through the feeding plate 34. The stirrer 35 can fully mix them with the sewage. After mixing, the mixture is left to stand, allowing the small particles in the sewage to clump together and finally settle to the bottom of the purification tank 30. When the user needs to input the purified water from the purification tank 30 into the water purification tank 28, the solenoid valve 32 is opened to discharge the impurities settled at the bottom of the purification tank 30 through the drain pipe 31. The user can then replenish the purification tank 30 with clean water through the water supply pipe 33.

[0042] When the user starts the entire device and pours the raw material into the feed inlet 2, the vibrating motor 7 drives the screening box 4 to vibrate. The screening box 4 continuously stretches and compresses the spring 11 through the guide rod 10, thereby preventing the screening box 4 from impacting the inner wall of the upper shell 1. At the same time, the spring 11's own rebound force limits the movement distance of the screening box 4, thus ensuring that the screening box 4 is in a vibrating state. The vibrating screening plates 5 can screen the raw material, and the impurities are discharged through the discharge nozzle 6. The upper set of screening plates 5 can screen out large particles of impurities in the raw material, and the lower set can screen out small particles of impurities. The raw material is discharged through the discharge nozzle 6 between the two sets of screening plates 5 and enters the interior of the discharge nozzle 6 through the guide pipe 15. After running for a period of time, some particles will become clogged inside the screening plate 5. At this time, the electric push rod 14 and connecting rod 13 can rotate the sealing plate 12, which can block the discharge nozzle 6. The high-pressure blower 8 can then discharge high-pressure air to the bottom of the screening box 4, allowing the air to be discharged upward through the screening plate 5 and finally discharged through the feed inlet 2. Under the action of air pressure, the particles clogged in the screening plate 5 can be pushed upward, thereby cleaning the screening plate 5, avoiding a reduction in the screening effect of the screening plate 5, and ensuring that impurities in the raw materials are removed. After screening, the raw materials enter the washing box 16 through the guide pipe 15. The second motor 21 drives the stirring plate 20 to rotate, and the stirring plate 20 stirs the clean water inside the washing box 16. Simultaneously, the raw materials can be stirred, and the second motor 21 can clean the raw materials in the cleaning tank 16, removing surface dust. The cleaned raw materials enter the lifting tank 17, and are conveyed to the discharge port 27 by the first motor 19 and the spiral pusher 18. Through the discharge port 27, the raw materials enter the interior of the drying chamber 22. The raw materials continuously slide down through the baffle plate 25 and are finally discharged from the device through the drop plate 26. The multiple sets of inclined and symmetrical baffle plates 25 can delay the passage time of the raw materials, ensuring that the raw materials are fully dried. When the raw materials pass through the baffle plate 25, the high-temperature air generated by the hot air blower 23 enters the interior of the drying chamber 22 through the hot air pipe 24, thereby maintaining a high temperature inside the drying chamber 22 and drying the raw materials. The clean water inside the purified water tank 28 is slowly transported to the cleaning tank 16 via the second connecting pipe 38 and the second water pump 39. Simultaneously, the wastewater inside the cleaning tank 16 and the lifting tank 17 is transported to the wastewater tank 29 for storage via the third connecting pipe 40 and the third water pump 41. When the clean water in the purified water tank 28 is exhausted, the wastewater tank 29 is also full. The purified water inside the purification tank 30 is then transported to the purified water tank 28 via the fourth connecting pipe 42 and the fourth water pump 43. All the wastewater inside the wastewater tank 29 is transported to the purification tank 30 via the first connecting pipe 36 and the first water pump 37. Finally, the user adds alum and activated carbon to the purification tank 30 via the feeding plate 34.The agitator 35 thoroughly mixes the wastewater with the urea, allowing it to settle and clump together, eventually settling at the bottom of the purification tank 30. When the user needs to transfer the purified water from the purification tank 30 to the clean water tank 28, the solenoid valve 32 is opened to discharge the sediment at the bottom of the purification tank 30 through the drain pipe 31. The user can then replenish the purification tank 30 with clean water through the water supply pipe 33, ensuring normal internal circulation. This device is not only simple and convenient to operate, but also effectively screens and cleans urea raw materials, improving their purity and thus increasing the purity of the produced urea. This eliminates the need for further purification work, reducing the user's production cycle and costs.

[0043] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A novel urea raw material purification device, characterized in that, The system includes an upper housing (1), a cleaning mechanism, a washing and drying mechanism, and a circulating filtration mechanism. The bottom of the upper housing (1) is fixedly connected to a lower housing (3). One end of the upper housing (1) is connected to a feed inlet (2). A screening box (4) is installed inside the upper housing (1), and the screening box (4) is inclined. Two sets of screening plates (5) are evenly fixedly connected inside the screening box (4). Three sets of discharge nozzles (6) are connected to the bottom of the screening box (4), and all the discharge nozzles (6) are inclined. The high end of the screening box (4) is connected to the feed inlet (2) through a rubber ring. A vibration motor (7) is installed at the bottom of the screening box (4). The upper housing (1) has a lower housing (3) fixedly connected to the bottom of the lower housing (3). The wall is uniformly fixedly connected with guide sleeves (9), and both sides of the screening box (4) are uniformly fixedly connected with guide rods (10), and one end of each guide rod (10) is slidably connected to the guide sleeve (9). One end of each guide rod (10) is fixedly connected with a spring (11), and one end of each spring (11) is fixedly connected inside the screening box (4). The upper shell (1) is provided with a cleaning mechanism for cleaning the screening plate (5). The lower shell (3) is provided with a cleaning and drying mechanism for cleaning and drying the urea raw material. The lower shell (3) is provided with a circulating filtration mechanism for filtering and circulating the clean water after cleaning the urea raw material. The cleaning mechanism includes a high-pressure blower (8), a sealing plate (12), a connecting rod (13), and an electric push rod (14). The bottom end of the upper housing (1) is provided with a high-pressure blower (8), and the output end of the high-pressure blower (8) is connected to the bottom end of the screening box (4) through a hose. One end of each of the discharge nozzles (6) is connected to a sealing plate (12) through a rotating shaft. One end of each of the sealing plates (12) is fixedly connected to a connecting rod (13). One end of each of the discharge nozzles (6) is connected to an electric push rod (14) through a rotating shaft, and the output end of each electric push rod (14) is connected to one end of the connecting rod (13) through a rotating shaft. The cleaning and drying mechanism includes a guide pipe (15) and a cleaning tank (16). The cleaning tank (16) is fixedly connected to one end of the lower housing (3), and the guide pipe (15) is connected to the top of the cleaning tank (16). A lifting bucket (17) is provided inside the lower housing (3). A spiral push rod (18) is connected to the inside of the lifting bucket (17) through a bearing. A first motor (19) is provided at one end of the lifting bucket (17), and the output end of the first motor (19) is fixedly connected to one end of the spiral push rod (18). The inside of the cleaning tank (16) is... A stirring plate (20) is connected to the bearing. A second motor (21) is provided on one side of the cleaning box (16), and the output end of the second motor (21) is fixedly connected to one end of the stirring plate (20). A drying box (22) is provided in the middle of the lower shell (3). A hot air blower (23) is provided at the top of the drying box (22). Three sets of hot air pipes (24) are connected to the output end of the hot air blower (23). Six sets of material blocking air plates (25) are evenly fixedly connected inside the drying box (22). A material dropping plate (26) is fixedly connected to one end of the drying box (22).

2. The novel urea raw material purification device according to claim 1, characterized in that: The control terminals of the vibration motor (7), high-pressure fan (8) and electric actuator (14) are all electrically connected to an external power source via an external switch.

3. The novel urea raw material purification device according to claim 1, characterized in that: The cleaning and drying mechanism also includes a lifting tank (17), a spiral pusher (18), a first motor (19), a stirring plate (20), a second motor (21), a drying box (22), a hot air blower (23), a hot air pipe (24), a baffle plate (25), and a discharge plate (26). The top end of the guide pipe (15) is connected to the upper shell (1), one end of the discharge nozzle (6) is located inside the guide pipe (15), and the bottom end of the lifting tank (17) is connected to the cleaning box (16). The bottom ends are connected, and the bottom ends of the hot air pipes (24) are all connected to the bottom of the drying box (22). The two adjacent sets of material blocking air plates (25) are symmetrically inclined. The material dropping plate (26) is located on one side of the lowest set of material blocking air plates (25). The material dropping plate (26) is inclined. The top of the lifting bucket (17) is provided with a discharge port (27), and the discharge port (27) is located at the top of the drying box (22). One end of the lifting bucket (17) is connected to the drying box (22).

4. The novel urea raw material purification device according to claim 3, characterized in that: The control terminals of the first motor (19), the second motor (21), and the hot air blower (23) are all electrically connected to an external power source via an external switch.

5. A novel urea raw material purification device according to claim 3, characterized in that: The middle part of the cleaning tank (16) is a symmetrical inclined plane. The connection between the cleaning tank (16) and the lifting bucket (17) is the lowest end of the cleaning tank (16). The tilt angle of the stirring plate (20) is the same as that of one side of the cleaning tank (16). The lifting bucket (17) is tilted. The tilt angle and direction of the lifting bucket (17) and the stirring plate (20) are the same.

6. The novel urea raw material purification device according to claim 3, characterized in that: The circulating filtration mechanism includes a clean water tank (28), a wastewater tank (29), a purification tank (30), a drain pipe (31), a solenoid valve (32), a water supply pipe (33), a feeding plate (34), a stirrer (35), a first connecting pipe (36), a first water pump (37), a second connecting pipe (38), a second water pump (39), a third connecting pipe (40), a third water pump (41), and a fourth connecting pipe (42). The clean water tank (28) is installed inside the lower housing (3), and a wastewater tank is installed on one side of the clean water tank (28). A water bucket (29) is provided with a purification bucket (30) on one side of the lower shell (3), and the purification bucket (30) is located on one side of the discharge port (27). The bottom end of the purification bucket (30) is connected to a drain pipe (31), and one end of the drain pipe (31) is located on the outside of the lower shell (3). A solenoid valve (32) is provided in the middle of the drain pipe (31). A water supply pipe (33) is connected to the top of the purification bucket (30). A feeding plate (34) is connected to the top of the purification bucket (30), and the feeding plate (34) is located on the water supply pipe (37). 3) At the top, a stirrer (35) is provided inside the purification tank (30), and the top of the stirrer (35) is located outside the purification tank (30). The top of the purification tank (30) is connected to a first connecting pipe (36), and one end of the first connecting pipe (36) is located at the bottom of the sewage tank (29). A first water pump (37) is provided in the middle of the first connecting pipe (36). One end of the cleaning tank (16) is connected to a second connecting pipe (38), and one end of the second connecting pipe (38) is located at the bottom of the clean water tank (28). A second water pump (39) is provided in the middle of the second connecting pipe (38), a third connecting pipe (40) is connected to the bottom of the lifting bucket (17), and one end of the third connecting pipe (40) is connected to the sewage bucket (29). A third water pump (41) is provided in the middle of the third connecting pipe (40), a fourth connecting pipe (42) is connected to the lower middle part of the purification bucket (30), and one end of the fourth connecting pipe (42) is connected to the clean water bucket (28). A fourth water pump (43) is provided in the middle of the fourth connecting pipe (42).

7. A novel urea raw material purification device according to claim 6, characterized in that: The control terminals of the solenoid valve (32), stirrer (35), first water pump (37), second water pump (39), third water pump (41) and fourth water pump (43) are all electrically connected to an external power source through an external switch.

8. A method for operating a novel urea raw material purification device according to any one of claims 1-7, characterized in that: Step 1: Screening. The raw material is poured into the feed inlet (2). At this time, the vibration motor (7) drives the screening box (4) and the screening plate (5) to vibrate. The vibrating screening plate (5) can screen the raw material and discharge impurities through the discharge nozzle (6). The upper set of screening plates (5) can screen out large particles of impurities in the raw material, and the lower set can screen out small particles of impurities. The raw material is discharged through the discharge nozzle (6) between the two sets of screening plates (5) and enters the discharge nozzle (6) through the guide pipe (15). Step 2: Cleaning. After running for a period of time, some particles will block the inside of the screening plate (5). At this time, the electric push rod (14) and the connecting rod (13) can block the discharge nozzle (6) with the sealing plate (12). The high-pressure blower (8) can discharge high-pressure air to the bottom of the screening box (4). Under the action of air pressure, the particles blocked in the screening plate (5) can be pushed upward, thereby cleaning the screening plate (5). Step 3: Cleaning. After screening, the raw materials enter the cleaning tank (16) through the feed pipe (15). The second motor (21) and the stirring plate (20) can clean the raw materials in the cleaning tank (16) and wash away the dust on their surface. Step 4: Drying. The cleaned raw material enters the lifting bucket (17), and is transported to the inside of the drying chamber (22) by the first motor (19), the spiral push rod (18) and the discharge port (27). The material passage time can be delayed by multiple sets of inclined and symmetrical baffles (25). When the raw material passes through the baffles (25), the high temperature air generated by the hot air blower (23) enters the inside of the drying chamber (22) through the hot air pipe (24), thereby drying the raw material. The raw material slides down through the baffles (25) and is finally discharged from the device through the discharge plate (26). Step 5: Circulation. Through the second connecting pipe (38) and the second water pump (39), the clean water inside the purified water tank (28) can be slowly transported to the inside of the cleaning tank (16). At the same time, the sewage inside the cleaning tank (16) and the lifting tank (17) can be transported to the inside of the sewage tank (29) for storage through the third connecting pipe (40) and the third water pump (41). Through the fourth connecting pipe (42) and the fourth water pump (43), the purified water inside the purification tank (30) can be transported to the inside of the purified water tank (28). Through the first connecting pipe (36) and the first water pump (37), all the sewage inside the sewage tank (29) can be circulated. The wastewater is transported to the inside of the purification tank (30). Then, the user adds alum and activated carbon to the inside of the purification tank (30) through the feeding plate (34). The agitator (35) can fully mix them with the wastewater. After mixing, the wastewater is left to stand, so that the small particles in the wastewater clump together and finally settle to the bottom of the purification tank (30). When the user needs to input the purified water inside the purification tank (30) into the water purification tank (28), the solenoid valve (32) is opened first to discharge the impurities settled at the bottom of the purification tank (30) through the drain pipe (31). The user can replenish the purified water in the purification tank (30) through the water replenishment pipe (33).

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