Ultrasonic based crystallization removal device and method of use

Abstract

The application relates to the technical field of aluminum trichloride production, in particular to a crystallization removing device based on ultrasonic waves, which comprises a catcher, the inner cavity of the catcher is provided with a crystallization mechanism and a collector, the crystallization mechanism is fixed at the bottom of a cold gas suspension pipe and comprises a plurality of coaxially arranged crystallization rings, every two adjacent crystallization rings form equidistant crystallization cavities, and every crystallization ring is internally provided with an air cavity communicated with the cold gas suspension pipe, a plurality of uniformly distributed ultrasonic transducers are arranged in the hollow cavity, and a load sensor is arranged between the outer top wall of the catcher and the flange of the cold gas suspension pipe; the equidistant crystallization cavities formed between the plurality of coaxially arranged crystallization rings are used to realize the equal-thickness crystallization of aluminum trichloride, the ultrasonic transducers are used to realize the automatic removal of the crystallization, the frequency of the ultrasonic waves is constant in the working process, the power consumption of the ultrasonic transducers is greatly reduced, the crystallization removal efficiency is improved, and the collector is used to realize the quantitative automatic discharge of the crystallization.

Description

Technical Field

[0001] This invention relates to the field of aluminum trichloride production technology, and in particular to an ultrasonic crystal removal device and its usage method. Background Technology

[0002] The process of preparing anhydrous aluminum trichloride using aluminum ingots involves reacting molten aluminum with chlorine gas in a reactor. The generated aluminum trichloride gas enters a collection tank through a sublimation tube, where it condenses on the tank wall to form aluminum trichloride crystals. The thickness of the aluminum trichloride crystals varies, requiring workers to tap the outer wall of the crystallization tank to collect them. The crystals are then discharged through the bottom of the collection tank. This process is labor-intensive, inefficient, and the continuous tapping reduces the lifespan of the collection tank.

[0003] Currently, the main methods for automatically collecting aluminum trichloride crystals include the scraper method, hammer impact method, and ultrasonic removal method. The scraper method uses a cross-shaped scraper inside the collector to remove crystals; however, aluminum trichloride gas crystallizes on the scraper surface, and as the amount of crystals increases, the scraper's operating efficiency gradually decreases, resulting in insufficient effectiveness. The ultrasonic removal method is less effective because the crystallization of aluminum trichloride gas on the inner wall of the collector is irregular, and the thickness of the crystals varies at different locations. This uneven crystal thickness leads to inconsistent ultrasonic frequencies, increasing the difficulty of ultrasonic crystal removal. Summary of the Invention

[0004] The technical problem to be solved by the present invention is: in order to overcome the problems that the manual knocking removal of aluminum trichloride crystals in the prior art is labor-intensive, inefficient and the continuous knocking will reduce the service life of the collection tank, and that aluminum trichloride gas will crystallize on the scraper surface during scraping removal, causing the scraper's operating efficiency to gradually decrease, the present invention provides an ultrasonic crystal removal device and its usage method.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a crystal removal device based on ultrasound, comprising a collector, wherein the collector is provided with a sublimation gas inlet pipe and a cold gas suspension pipe communicating with its inner cavity, and the cold gas suspension pipe is slidably connected to the collector, and the cold gas suspension pipe extends to the outside of the collector and has a flange protruding radially, the flange being used to abut against the outer top wall of the collector to realize the installation of the cold gas suspension pipe, and the inner cavity of the collector is provided with:

[0006] The crystallization mechanism is fixed at the bottom of the air suspension pipe and includes several coaxially arranged crystallization rings. Two adjacent crystallization rings form equidistant crystallization cavities, and each crystallization ring has an air cavity that communicates with the air suspension pipe. Several uniformly distributed ultrasonic transducers are installed inside the hollow cavity. A load sensor is provided between the outer top wall of the trap and the flange of the air suspension pipe.

[0007] The collector, located below the crystallization mechanism, includes a resiliently arranged collection tube. The collection tube includes a tapered section and a cylindrical section distributed vertically, with the connection between the two forming a communication port. The communication port is equipped with a release controller that can open or close it. The release controller includes a blocking cone slidably disposed in the communication port and a T-shaped rod fixed to the bottom of the blocking cone. The cylindrical section has a groove, and both ends of the T-shaped rod pass through the groove and form a trigger ring at the end.

[0008] The above technical solution utilizes equidistant crystallization cavities formed between several coaxially arranged crystallization rings to achieve uniform thickness crystallization of aluminum trichloride, and uses an ultrasonic transducer to achieve automated crystal removal. This ensures that the frequency of the ultrasonic waves remains constant during operation, significantly reducing the power consumption of the ultrasonic transducer and improving the crystal removal efficiency. In addition, a collector is used to achieve quantitative and automatic discharge of crystals.

[0009] Furthermore, the crystallizing ring is a fixed crystallizing ring, and several fixed crystallizing rings are coaxially fixed to form a fixed crystallizing mechanism.

[0010] Furthermore, the crystallizing rings are sliding crystallizing rings, and several sliding crystallizing rings are slidably connected to form a sliding crystallization mechanism, which can achieve axial contraction or separation. When several sliding crystallizing rings are in the contracted state, the resulting structure is similar to a fixed crystallization mechanism. When several sliding crystallizing rings are in the separated state, their outer and inner walls can fully contact aluminum trichloride gas, and the crystallization speed of both is greater than that of the crystallizing rings in the contracted state. Moreover, the crystallization speed of the outer wall of the separated crystallizing ring is greater than that of the inner wall. After being configured as sliding crystallizing rings, they are first made to be in a separated state, which can accelerate the crystallization speed. When a certain crystallization thickness is reached, they are contracted to continue crystallization until a crystal with the same width as the crystallization cavity is formed.

[0011] Furthermore, each sliding crystal ring has several circumferentially distributed sliding ribs protruding from its inner peripheral wall, and several circumferentially distributed sliding grooves opened on its outer peripheral wall. The sliding grooves have a double-ended closed structure. The sliding ribs of two adjacent sliding crystal rings are slidably connected to the sliding grooves, and the cross-section of the sliding ribs is T-shaped or dovetail-shaped to prevent the sliding ribs from separating from the sliding grooves.

[0012] Furthermore, the sliding crystallization mechanism also includes a drive unit for driving the retraction or separation of several sliding crystallization rings. The drive unit includes a winding mechanism and a traction reset rope with one end wound around the winding mechanism. The other end of the traction reset rope is fixed to the sliding rib of the outermost sliding crystallization ring, and the top of the remaining sliding crystallization rings is provided with guide grooves for the traction reset rope to pass through. When the winding mechanism winds up, adjacent sliding crystallization rings move upward step by step and cooperate with the sliding ribs and sliding grooves until they are completely retracted to achieve the retracted state of the sliding crystallization rings. When the winding mechanism unwinds, adjacent sliding crystallization rings move downward step by step and cooperate with the sliding ribs and sliding grooves to achieve the separated state of the sliding crystallization rings.

[0013] Furthermore, a venting plate is provided between the cold air suspension pipe and the sliding crystallization ring in the sliding crystallization mechanism. The venting plate has a venting cavity for connecting the cold air suspension pipe and the hollow cavity. Several venting connectors are provided at the bottom of the venting cavity. The sliding crystallization ring is provided with a quick-connect connector that communicates with the hollow cavity. When the venting connector and the quick-connect connector are connected, the cold air in the cold air suspension pipe enters the hollow cavity through the venting cavity, the venting connector and the quick-connect connector in sequence to cool the sliding crystallization ring.

[0014] Furthermore, a sealing part is provided between the T-bar and the groove. The groove can cause crystals to leak out, so a sealing part is provided. The sealing part can be made of elastic fabric. When the T-bar moves, the sealing part undergoes elastic deformation to meet the movement of the T-bar, while preventing crystals from falling to the outside.

[0015] Furthermore, the bottom of the trap is provided with two locking devices, and the cylindrical section has two locking grooves that cooperate with the locking devices to delay sealing of the communication port.

[0016] Furthermore, the device also includes a reaction system, which includes a reactor. A sublimation pipe is connected between the reactor and the sublimation gas inlet pipe. The sublimation pipe is equipped with a vent valve. A cold air suspension pipe is connected to a refrigerator through a cold air duct, and a cold air valve is installed on the cold air duct. After aluminum ingots and chlorine gas react in the reactor, aluminum trichloride gas is generated. The aluminum trichloride gas enters the collector through the sublimation pipe and the sublimation gas inlet pipe. The cold air in the refrigerator enters the hollow cavity through the cold air duct and the cold air suspension pipe. The aluminum trichloride gas condenses upon cooling to form aluminum trichloride crystals that adhere to the crystallization cavity.

[0017] A method of using an ultrasonic-based crystal removal device includes the following steps:

[0018] S1: After aluminum ingots and chlorine react in the reactor, aluminum trichloride gas is generated. The aluminum trichloride gas enters the collector through the sublimation tube and the sublimation gas inlet tube. Cold air enters the hollow cavity through the cold air duct and the cold air suspension pipe. When the aluminum trichloride gas encounters cold sublimation, aluminum trichloride crystals are generated and adhere to the crystallization cavity.

[0019] S2: As crystals accumulate, when the weight detected by the load sensor reaches the start threshold, the PLC controller sends a signal to close the vent valve, blocking the aluminum trichloride gas from entering the collector. It also controls the ultrasonic transducer on the hollow cavity wall to vibrate at high frequency. The high-frequency ultrasonic waves on the wall cause the solid medium to oscillate, generating shear force at the interface, thereby removing the aluminum trichloride crystals. If the gravity does not exceed the set threshold, the PLC controller controls the cooler to reduce the temperature of the cold air entering the hollow cavity, thereby reducing the temperature of the crystallization mechanism and accelerating the crystallization of aluminum trichloride.

[0020] S3: The fallen aluminum trichloride crystals are collected through the collection tube. As the amount of aluminum trichloride crystals collected increases, the collection tube slides downward until the trigger ring contacts the bottom wall of the trap. The collection tube continues to descend. At this time, the T-bar drives the sealing cone to push upward, and the collection tube achieves passage. At this time, the locker and the locking groove cooperate to lock and delay the closure of the connection port until it is completely discharged.

[0021] The beneficial effects of this invention are as follows: This invention utilizes equidistant crystallization cavities formed between several coaxially arranged crystallization rings to achieve uniform thickness crystallization of aluminum trichloride, and uses an ultrasonic transducer to achieve automated crystal removal. This ensures that the frequency of the ultrasonic waves remains constant during operation, significantly reduces the power consumption of the ultrasonic transducer, and improves the crystal removal efficiency. In addition, a collector is used to achieve quantitative and automatic discharge of crystals. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] Figure 1 This is a schematic diagram of the composition of the present invention;

[0024] Figure 2 This is a schematic diagram of the structure of Embodiment 1 of the present invention;

[0025] Figure 3 This is a schematic front cross-sectional view of Embodiment 1 of the present invention;

[0026] Figure 4 This is a first-view cross-sectional schematic diagram of the cooperation between the collector and the trap in this invention;

[0027] Figure 5 This is a second-view cross-sectional schematic diagram of the cooperation between the collector and the trap in this invention;

[0028] Figure 6This is a schematic diagram of the structure of Embodiment 2 of the present invention;

[0029] Figure 7 This is a schematic diagram of the crystallization mechanism in Embodiment 2 of the present invention;

[0030] Figure 8 This is a schematic diagram of the structure of the sliding crystal ring in a separated state according to Embodiment 2 of the present invention;

[0031] Figure 9 This is a schematic diagram of the structure of the sliding crystal ring in a contracted state according to Embodiment 2 of the present invention;

[0032] In the picture:

[0033] 1. Reaction system; 11. Refrigerator; 12. Cold air valve; 13. Cold air duct; 14. Sublimation tube; 15. Vent valve; 16. Reactor;

[0034] 2. Gas trap; 21. Sublimation gas inlet pipe; 22. Exhaust gas outlet pipe;

[0035] 3. Crystallization mechanism; 31. Air conditioning suspension pipe; 32. Crystallization chamber; 33. Hollow cavity; 331. Ultrasonic transducer; 34. Fixed crystallization ring; 35. Load sensor; 36. Sliding crystallization ring; 361. Sliding rib; 362. Quick connector; 363. Sliding groove; 364. Guide groove; 37. Ventilation disc; 371. Ventilation chamber; 372. Ventilation connector; 38. Traction reset rope;

[0036] 4. Collector; 41. Fixing rod; 42. Telescopic rod; 43. Collection pipe; 431. Slide groove; 432. Enclosure; 433. Locking groove; 44. Limiting ring;

[0037] 5. Release controller; 51. Blocking cone; 52. T-bar; 53. Trigger ring;

[0038] 6. Locker. Detailed Implementation

[0039] The invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention in a schematic manner. Therefore, they only show the components relevant to the invention, and directions and references, such as up, down, left, right, etc., are only used to aid in the description of the features in the drawings. Therefore, the following specific embodiments are not intended to be restrictive, and the scope of the claimed subject matter is defined solely by the appended claims and their equivalents.

[0040] Example 1:

[0041] like Figures 1-5 As shown, the present invention is an ultrasonic-based crystal removal device, comprising a reaction system 1 and a collector 2:

[0042] The trap 2 is provided with a sublimation gas inlet pipe 21 and a cold gas suspension pipe 31 communicating with its inner cavity. The cold gas suspension pipe 31 extends to the outside of the trap 2 and has a flange protruding radially. The flange abuts against the outer top wall of the trap 2 to realize the installation of the cold gas suspension pipe 31. The bottom of the trap 2 is provided with a tail gas discharge pipe 22 communicating with the inner cavity, and the tail gas discharge pipe 22 is connected to the tail gas collection device. The inner cavity of the trap 2 is provided with:

[0043] The fixed crystallization mechanism is located at the bottom of the air suspension pipe 31 and includes several coaxial fixed crystallization rings 34. The diameter of the fixed crystallization rings 34 is increased by an equal amount so that two adjacent fixed crystallization rings 34 form equidistant crystallization cavities 32. The width of the crystallization cavity 32 is 10mm to 15mm. In order to make the crystals only adhere to the crystallization cavity 32, the other areas of the trap 2 are coated with polytetrafluoroethylene solution to make it difficult for crystals to adhere. Each fixed crystallizing ring 34 has a hollow cavity 33 connected to the cold air suspension pipe 31. Several uniformly distributed ultrasonic transducers 331 are installed inside the hollow cavity 33. A load sensor 35 is provided between the outer top wall of the collector 2 and the flange of the cold air suspension pipe 31 to detect the change in the weight of the entire crystallizing mechanism 3. After the cold air enters the hollow cavity 33 through the cold air suspension pipe 31, the temperature of the inner and outer peripheral walls of the fixed crystallizing ring 34 drops sharply. The load sensor 35 is connected to the computer, and the ultrasonic transducers 331 are controlled to turn on according to the measurement threshold of the load sensor 35. Due to the limitation of the thickness of the crystallizing cavity 32, the wall thickness generated during crystallization cannot exceed the width of the crystallizing cavity 32, thereby ensuring the uniformity of crystallization. At the same time, the structure is simple and the use is more stable.

[0044] Collector 4, located below the crystallization mechanism 3, includes four fixed rods 41 fixedly connected to the inner peripheral wall of collector 2. The fixed rods 41 are connected to a collection tube 43 via telescopic rods 42. The telescopic rods 42 have internal tension springs to achieve elastic setting of the collection tube 43. The fixed rods 41 provide fixed points for the telescopic rods 42, creating a gap between the outer peripheral wall of the collection tube 43 and the inner peripheral wall of collector 2, facilitating exhaust gas discharge. The collection tube 43 includes tapered and cylindrical sections distributed vertically, with the connection point forming a communication port. This communication port is equipped with a release controller 5 that can open or close it. The conical section is wider at the top and narrower at the bottom, while the cylindrical section extends to the outside of the trap 2 and has a radially protruding bottom forming a limiting ring 44 that matches the outer bottom wall of the trap 2. This prevents the collection tube 43 from slipping directly off and separating from the trap 2. The falling crystals fall into the inside of the collection tube 43, and the connection port is closed by the release controller 5. As the weight of the collection tube 43 increases, the tension spring inside the telescopic rod 42 undergoes elastic deformation, causing the collection tube 43 to move downwards until the release controller 5 is triggered to open the connection port, at which point the crystals are discharged through the connection port.

[0045] The release controller 5 includes a sealing cone 51 slidably disposed at the communication port and a T-shaped rod 52 fixed to the bottom of the sealing cone 51. The cylindrical section has a groove 431, and both ends of the T-shaped rod 52 pass through the groove 431 and form a trigger ring 53 at the end that cooperates with the inner bottom wall of the trap 2. When the collection tube 43 continues to descend, the trigger ring 53 will contact the inner bottom wall of the trap 2. At this time, the trigger ring 53 will slide relative to the collection tube 43 due to the limiting effect of the trap 2, and the trigger ring 53 will drive the T-shaped rod 52. As the T-shaped rod moves upward, the sealing cone 51 is pushed out and disengaged from the connecting port, allowing the crystallized particles to be quickly discharged through the collecting pipe 43. The T-shaped rod 52 needs to be fixed to the trigger ring 53 located outside the collecting pipe 43, so a groove 431 is provided. The groove 431 may cause crystals to leak out, so a sealing part 432 is provided. The sealing part 432 can be sealed with an elastic fabric. When the T-shaped rod 52 moves, the sealing part 432 undergoes elastic deformation to satisfy the movement of the T-shaped rod 52, while preventing crystals from falling to the outside.

[0046] The bottom of the collector 2 is provided with two locking devices 6. The collection tube 43 has two locking slots 433 that cooperate with the locking devices 6 for locking. The locking device 6 includes a trigger, a telescopic mechanism, an electromagnetic mechanism, and a delayed start mechanism. The trigger is located at the front end of the telescopic mechanism. When the locking slot 433 is triggered by the trigger at the front end of the telescopic mechanism, the delayed start mechanism is activated and a control countdown begins. As the collection tube 43 discharges more crystals, its weight becomes lighter. At this time, the tension spring of the telescopic rod 42 will pull the collection tube 43 upward. The telescopic mechanism adopts the form of a spring and a beveled pin. The collection tube 43 slides downward easily, but when sliding upward, it is limited by the horizontal plane. When the delayed start mechanism is triggered, the electromagnetic mechanism is energized and attracts the beveled pin of the telescopic mechanism. The locking slot 433 separates from the beveled pin, and the collection tube 43 naturally resets, completing the discharge operation.

[0047] The reaction system 1 includes a reactor 16, a sublimation pipe 14 connected between the reactor 16 and the sublimation gas inlet pipe 21, a vent valve 15 provided on the sublimation pipe 14, and a cooler 11 connected to the cold air suspension pipe 31 via a cold air duct 13, with a cold air valve 12 provided on the cold air duct 13. After aluminum ingots and chlorine react in the reactor 16, aluminum trichloride gas is generated. When the vent valve 15 is opened, the aluminum trichloride gas enters the collector 2 through the sublimation pipe 14 and the sublimation gas inlet pipe 21. During the collection process, the vent valve 15 is closed to stop the gas flow. During cooling, the cold air valve 12 is opened, and the cold air in the cooler 11 enters the hollow cavity 33 through the cold air duct 13 and the cold air suspension pipe 31. The surface temperature of the crystallization mechanism 3 decreases, thereby cooperating with the sublimation gas to crystallize in the crystallization cavity 32 of the crystallization mechanism 3.

[0048] Example 2:

[0049] Example 2 provides a method for using an ultrasonic-based crystallization removal device, applicable to the fixed crystallization mechanism used in Example 1, comprising the following steps:

[0050] S1: After aluminum ingot and chlorine react in the reactor 16, aluminum trichloride gas is generated. The aluminum trichloride gas enters the collector 2 through the sublimation pipe 14 and the sublimation gas inlet pipe 21. Cold air enters the hollow cavity 33 through the cold air pipe 13 and the cold air suspension pipe 31. The aluminum trichloride gas condenses upon cooling to form aluminum trichloride crystals that adhere to the crystallization cavity 32.

[0051] S2. As crystallization increases, when the load sensor 35 detects that the weight has reached the start threshold, the PLC controller sends a signal to close the vent valve 15, blocking the aluminum trichloride gas from entering the collector 2. It controls the ultrasonic transducer 331 on the wall of the hollow cavity 33 to vibrate at high frequency. The high-frequency ultrasonic waves on the wall will cause the solid medium to oscillate, generating shear force at the interface, thereby removing the aluminum trichloride crystals. If the gravity does not exceed the set threshold, the PLC controller controls the cooler 11 to reduce the temperature of the cold air entering the hollow cavity 33, thereby reducing the temperature of the crystallization mechanism 3 and accelerating the crystallization speed of aluminum trichloride.

[0052] S3: The fallen aluminum trichloride crystals are collected through the collection tube 43. As the amount of aluminum trichloride crystals collected increases, the collection tube 43 slides downward until the trigger ring 53 contacts the inner bottom wall of the trap 2. The collection tube 43 continues to descend. At this time, the T-shaped rod 52 drives the sealing cone 51 to push upward, and the collection tube 43 achieves passage. At this time, the locking device 6 and the locking groove 433 cooperate to lock. The timer controls the locking device 6 to delay closing until it is completely discharged.

[0053] Example 3:

[0054] like Figures 6-9 As shown, the difference between Embodiment 3 and Embodiment 1 is that: the crystallizing ring is a sliding crystallizing ring 36, and several sliding crystallizing rings 36 are slidably connected to form a sliding crystallizing mechanism, which can realize axial contraction or separation. Each sliding crystallizing ring 36 has several circumferentially distributed sliding ribs 361 protruding from its inner peripheral wall, and several circumferentially distributed sliding grooves 363 are opened on its outer peripheral wall. The sliding grooves 363 have a double-end closed structure. The sliding ribs 361 of two adjacent sliding crystallizing rings 36 are slidably connected to the sliding grooves 363, and the cross section of the sliding ribs 361 is T-shaped or dovetail-shaped to prevent the sliding ribs 361 from separating from the sliding grooves 363.

[0055] The sliding crystallization mechanism 3 further includes a drive unit for driving the retraction or separation of several sliding crystallization rings 36 and a vent plate 37 disposed between the air suspension pipe 31 and the sliding crystallization rings 36. The innermost sliding crystallization ring 36 is fixed to the vent plate 37. The drive unit includes a winding mechanism and a traction reset rope 38 with one end wound around the winding mechanism. The other end of the traction reset rope 38 is fixed to the sliding rib 361 of the outermost sliding crystallization ring 36, and the tops of the remaining sliding crystallization rings 36 are provided with guide grooves 364 for passing through the traction reset rope 38. The vent plate 37 has a vent cavity 371 communicating with the air suspension pipe 31. The bottom of the vent cavity 371 is provided with several vent connectors 372. The sliding crystallization ring 36 is provided with a quick-connect connector 362 communicating with the hollow cavity 33. When the vent connector 372 is connected to the quick-connect connector 362, the air suspension pipe 31 is filled with air. The cold air enters the hollow cavity 33 sequentially through the venting cavity 371, the venting connector 372, and the quick-connect connector 362 to cool the fixed crystal ring 34. The quick-connect connector 362 can be a normal structure or a telescopic structure. If the quick-connect connector 362 is a normal structure, when the sliding crystal rings 36 are in the retracted state, the quick-connect connector 362 is connected to the venting connector 372, and the cold air passage is connected. When the sliding crystal rings 36 are in the separated state, the quick-connect connector 362 is separated from the venting connector 372, and the cold air passage is disconnected. If the quick-connect connector 362 is a telescopic structure, the cold air passage can be connected whether the sliding crystal rings 36 are in the retracted or separated state.

[0056] Example 4:

[0057] Example 4 provides a method for using an ultrasonic-based crystallization removal device, applicable to the sliding crystallization mechanism used in Example 3, comprising the following steps:

[0058] S1: After aluminum ingots and chlorine react in the reactor 16, aluminum trichloride gas is generated. The aluminum trichloride gas enters the collector 2 through the sublimation pipe 14 and the sublimation gas inlet pipe 21. At this time, several sliding crystal rings 36 are in a closed state. The quick-connect connector 362 on the sliding crystal ring 36 (the quick-connect connector 362 here is a normal structure) is connected to the vent connector 372 on the vent plate 37. The cold air valve 12 is turned on, and the cold air is output through the refrigerator 11. It enters the hollow cavity 33 through the cold air pipe 13, the cold air suspension pipe 31 and the vent cavity 371. The surface temperature of the sliding crystal ring 36 drops rapidly.

[0059] S2: Release the traction reset rope 38, causing the sliding crystallizing rings 36 to separate from each other (although the quick-connect connector 362 and the vent connector 372 are disconnected at this time, the temperature of the sliding crystallizing rings 36 has rapidly decreased in step S1 above, which can meet the requirements for subsequent crystallization). The outer wall of each sliding crystallizing ring 36 is directly subjected to aluminum trichloride gas, causing rapid surface crystallization. The crystallization speed is greater than the crystallization speed of the inner wall of the sliding crystallizing ring 36, and both speeds are greater than the crystallization speed when the sliding crystallizing ring 36 is in the closed state. When the crystallization thickness of the outer wall of the sliding crystallizing ring 36 is less than and close to the width of the crystallization cavity 32... When the thickness of the crystallization is half of the width of the crystallization cavity 32, the thickness of the crystallization on the inner wall will inevitably be less than half of the width of the crystallization cavity 32. This timing can be determined by the weight detected by the load sensor 35 (i.e., the weight detected by the load sensor 35 is less than the start threshold). At this time, the traction reset rope 38 is wound up, and the sliding rib 361 contacts and limits the top closed end of the sliding groove 363, so that the adjacent sliding crystallization ring 36 is stretched upward step by step until it is completely closed. At this time, the hollow cavity 33 continues to be circulated with cold air so that the crystallization cavity 32 continues to crystallize. The thickness of the sliding crystallization ring 36 is consistent with the width of the crystallization cavity 32, thereby achieving equal thickness crystallization of aluminum trichloride.

[0060] S3. As crystallization increases, when the weight detected by the load sensor 35 reaches the start threshold, the PLC controller sends a signal to close the vent valve 15, blocking the aluminum trichloride gas entering the collector 2. It then controls the ultrasonic transducer 331 of the hollow cavity 33 of the sliding crystallizing ring 36 to vibrate at high frequency. The high-frequency ultrasonic waves cause the solid medium to oscillate, generating shear force at the interface, thereby removing the aluminum trichloride crystals. If the gravity does not exceed the set threshold, the PLC controller controls the cooler 11 to reduce the temperature of the cold air entering the hollow cavity 33, thereby reducing the wall temperature of the sliding crystallizing ring 36 and accelerating the crystallization of aluminum trichloride.

[0061] S4: The fallen aluminum trichloride crystals are collected through the collection tube 43. As the amount of aluminum trichloride crystals collected increases, the telescopic rod 42 undergoes elastic deformation, and the collection tube 43 slides downward until the trigger ring 53 contacts the inner wall of the trap 2. The collection tube 43 continues to descend. At this time, the T-shaped rod 52 drives the sealing cone 51 to push upward, and the collection tube 43 achieves passage. At this time, the locking device 6 and the locking groove 433 cooperate to lock. The timer controls the locking device 6 to delay closing until it is completely discharged.

[0062] The above description, based on the preferred embodiments of the present invention, provides inspiration. Those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification but must be determined according to the claims.

Claims

1. A crystal removal device based on ultrasound, characterized in that: Includes a trap (2), which is provided with a sublimation gas inlet pipe (21) and a cold gas suspension pipe (31) communicating with its inner cavity, and the cold gas suspension pipe (31) is slidably connected to the trap (2). The inner cavity of the trap (2) is provided with: The crystallization mechanism (3) is located at the bottom of the cold air suspension pipe (31) and includes several coaxially arranged crystallization rings. Two adjacent crystallization rings form equidistant crystallization cavities (32) to form crystals of equal thickness inside each crystallization cavity (32). Each crystallization ring is provided with a hollow cavity (33) communicating with the cold air suspension pipe (31). An ultrasonic transducer (331) is installed inside the hollow cavity (33). A load sensor (35) for detecting the change of the self-weight of the entire crystallization mechanism (3) is provided between the outer top wall of the trap (2) and the flange of the cold air suspension pipe (31). The ultrasonic transducer (331) is controlled to open according to the measurement threshold of the load sensor (35). The collector (4) is located below the crystallization mechanism (3) and includes a collection tube (43) that is elastically arranged. The collection tube (43) includes a tapered section and a cylindrical section that are distributed vertically. The connection between the two forms a communication port. The communication port is provided with a release controller (5) that can open or close it. The release controller (5) includes a blocking cone (51) that is slidably arranged in the communication port and a T-shaped rod (52) that is fixed to the bottom of the blocking cone (51). The cylindrical section is provided with a groove (431). The two ends of the T-shaped rod (52) pass through the groove (431) and a trigger ring (53) is formed at the end for abutting against the inner bottom wall of the trap (2).

2. The crystal removal device based on ultrasound according to claim 1, characterized in that: The crystallization ring is a fixed crystallization ring (34), and several fixed crystallization rings are coaxially fixed to form a fixed crystallization mechanism.

3. The crystal removal device based on ultrasound according to claim 1, characterized in that: The crystallization ring is a sliding crystallization ring (36), and several sliding crystallization rings (36) are slidably connected to form a sliding crystallization mechanism.

4. The crystal removal device based on ultrasound according to claim 3, characterized in that: Each sliding crystal ring (36) has several circumferentially distributed sliding ribs (361) protruding from its inner peripheral wall, and several circumferentially distributed sliding grooves (363) opened on its outer peripheral wall. The sliding ribs (361) and sliding grooves (363) of two adjacent sliding crystal rings (36) are slidably connected.

5. The crystal removal device based on ultrasound according to claim 3, characterized in that: The sliding crystallization mechanism also includes a drive unit for driving several sliding crystallization rings (36) to retract or separate. The drive unit includes a winding mechanism and a traction reset rope (38) with one end wound around the winding mechanism. The other end of the traction reset rope (38) is fixed to the outermost sliding crystallization ring (36).

6. The crystal removal device based on ultrasound according to claim 3, characterized in that: A ventilation plate (37) is provided between the cold air suspension pipe (31) and the sliding crystallization ring (36) in the sliding crystallization mechanism. The ventilation plate (37) has a ventilation cavity (371) for connecting the cold air suspension pipe (31) and the hollow cavity (33).

7. The crystal removal device based on ultrasound according to claim 1, characterized in that: A sealing part (432) is provided between the T-shaped rod (52) and the slide groove (431).

8. The crystal removal device based on ultrasound according to claim 1, characterized in that: The bottom of the trap (2) is provided with a lock (6), and the cylindrical section is provided with a locking groove (433) that cooperates with the lock (6) to delay the sealing of the communication port.

9. The crystal removal device based on ultrasound according to claim 1, characterized in that: The device also includes a reaction system (1), which includes a reactor (16). A sublimation pipe (14) is connected between the reactor (16) and the sublimation gas inlet pipe (21). A vent valve (15) is provided on the sublimation pipe (14). A cooler (11) is connected to the cold air suspension pipe (31) through a cold air duct (13). A cold air valve (12) is provided on the cold air duct (13).

10. A method of using an ultrasonic-based crystal removal device according to any one of claims 1-9, characterized in that: Includes the following steps: S1: After aluminum ingots and chlorine react in the reactor (16), aluminum trichloride gas is generated. The aluminum trichloride gas enters the collector (2) through the sublimation pipe (14) and the sublimation gas inlet pipe (21). Cold air enters the hollow cavity (33) through the cold air pipe (13) and the cold air suspension pipe (31). The aluminum trichloride gas condenses upon cooling and sublimation to form aluminum trichloride crystals that adhere to the crystallization cavity (32). S2: As crystallization increases, when the weight detected by the load sensor (35) reaches the start threshold, the PLC controller sends a signal to close the ventilation valve (15), blocking the aluminum trichloride gas entering the trap (2), and controlling the ultrasonic transducer (331) on the wall of the hollow cavity (33) to vibrate at high frequency. The high frequency ultrasonic waves on the wall will cause the solid medium to oscillate, generating shear force at the interface, thereby removing the aluminum trichloride crystals. If the weight does not exceed the set threshold, the PLC controller controls the cooler (11) to reduce the temperature of the cold air entering the hollow cavity (33), reduce the temperature of the crystallization mechanism (3), and accelerate the crystallization speed of aluminum trichloride. S3: The fallen aluminum trichloride crystals are collected through the collection tube (43). As the amount of aluminum trichloride crystals collected increases, the collection tube (43) slides downward until the trigger ring (53) contacts the bottom wall of the trap (2). The collection tube (43) continues to descend. At this time, the T-shaped rod (52) drives the sealing cone (51) to push upward, and the collection tube (43) achieves passage, and the crystals are discharged.

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