Circulating cooling high-purity arsenic crystallizer

Abstract

The utility model relates to the technical field of crystallizers, in particular to a circulating cooling high-purity arsenic crystallizer. According to the technical scheme, the reaction kettle comprises a kettle body, a first motor, a condenser, a lifting plate, a guide plate, a connecting plate and a bottom plate, the bottom plate is arranged in the lower end of the kettle body, a spiral heat exchange pipe is arranged at the upper end of the bottom plate, the condenser is arranged at the upper end of the kettle body, the first motor is arranged at the upper end of the kettle body, and a supporting ring is arranged on the inner wall of the kettle body. A lifting plate and a guide plate are arranged above the supporting ring, connecting plates are arranged on one side of the upper end of the bottom plate, a ring seat is arranged between the connecting plates, a rotating ring is rotationally installed in the ring seat, a connecting rod is arranged at the lower end of the rotating ring, and a side rod is arranged on the outer wall of the connecting rod. Through the liftable heat exchange tube and the stirring structure, crystals are prevented from being crystallized on the outer walls of the heat exchange tube and the stirring structure, later cleaning is facilitated, and the spiral heat exchange tube radiates inwards and outwards at the same time, so that materials are rapidly cooled, and the crystallization efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of crystallizer technology, and in particular to a circulating cooling high-purity arsenic crystallizer. Background Technology

[0002] High-purity arsenic refers to arsenic with extremely high purity. High-purity arsenic is a raw material for semiconductor materials, special alloys, and infrared optical materials. During the processing, it is separated by directional crystallization in a high-pressure inert gas environment using the difference in the segregation coefficients of impurities and arsenic. The sublimation stage requires heating to about 820°C, and the cooling rate during the crystallization stage is 100-300°C / h. The entire process lasts 20-40 hours.

[0003] Because the crystallization time is relatively long, crystals will also form on the outer wall of the internal stirring structure during use, making it difficult to clean the internal structure. In addition, during the cooling process, heat is radiated from the outside of the equipment to the inside, resulting in low heat exchange efficiency. Therefore, we propose a circulating cooling high-purity arsenic crystallizer to solve the existing problems. Utility Model Content

[0004] The purpose of this invention is to address the problems existing in the background technology by proposing a circulating cooling high-purity arsenic crystallizer.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a circulating cooling high-purity arsenic crystallizer, comprising a vessel body, a motor, a condenser, a lifting plate, a guide plate, a connecting plate, and a bottom plate. The bottom plate is located inside the lower end of the vessel body, and a spiral heat exchange tube is located on the upper end of the bottom plate. A condenser is located at the upper end of the vessel body, and a motor is located at the upper end of the vessel body. A support ring is located on the inner wall of the vessel body, and a lifting plate and a guide plate are located above the support ring. Symmetrically distributed connecting plates are located on one side of the upper end of the bottom plate. A threaded hole for threaded connection with a screw is opened inside the upper end of the lifting plate. The guide plate is slidably sleeved on the outer wall of a guide rod. A ring seat is located between the connecting plates, and a rotating ring is rotatably installed inside the ring seat. A gear ring is located on the upper end of the rotating ring. A second motor is located at one end of the connecting plate, and a gear meshing with the gear ring is located at the output end of the second motor. A connecting rod arranged in a ring array is located at the lower end of the rotating ring, and side rods arranged in a ring array are located on the outer wall of the connecting rod.

[0006] Preferably, the vessel body has an upper cavity and a lower cavity, with the support ring located on the upper inner wall of the lower cavity. The stirring structure and heat exchange tubes can be housed inside the upper cavity, while the lower cavity is used for material crystallization.

[0007] Preferably, a support is fitted onto the outer wall of the vessel body, and a feed pipe connected to a lower cavity and controlled by a valve is installed inside one end of the vessel body. The support supports the vessel body, and the feed pipe transports materials into the lower cavity, with the feed pipe controlled by a valve.

[0008] Preferably, a bearing seat is provided at the upper end of the support ring, and the lower end of the screw is rotatably mounted inside the bearing seat. The lower end of the screw receives rotational support through the bearing seat, thereby improving the rotational stability of the lower end of the screw.

[0009] Preferably, both ends of the heat exchange tube are provided with flexible hoses communicating with the condenser. The flexible hoses are used for the flow of the heat exchange medium and also provide bending characteristics to transport the cooling medium for the raising and lowering of the heat exchange tube.

[0010] Preferably, the upper end of the base plate is provided with a conical surface, the outer diameter of the base plate is larger than the inner diameter of the support ring, and a guide hopper is provided on the inner wall of the lower end of the vessel body. The conical surface allows the material located at the upper end of the base plate to flow outward, thus playing a guiding role. When the upper end of the base plate is in contact with the support ring, the upper cavity and the lower cavity are separated and the two cavities are not connected to each other.

[0011] Preferably, the upper end of the connecting plate is provided with a spring that connects to the lifting plate and the guide plate. Both the lifting plate and the guide plate have through holes. The upper end of the connecting plate is provided with a positioning rod that passes through the spring and is slidably inserted into the through hole. The connecting plate is elastically installed with the lifting plate and the guide plate via the spring, allowing the connecting plate to compensate for longitudinal movement when lifted. When the spring extends or retracts, the positioning rod slides within the through hole to position the spring and prevent it from shifting outwards.

[0012] Preferably, a positioning plate is provided at the upper end of the base plate, and force-bearing blocks are provided at one end of the positioning plate. A mounting bracket is provided on the inner wall of the upper end of the vessel body. A mounting shaft is rotatably mounted inside the lower end of the mounting bracket. A locking block is provided at one end of the mounting shaft. A torsion spring is sleeved on the outer side of the mounting shaft, with its two ends connected to the locking block and the mounting bracket, respectively. When the positioning plate rises with the base plate, the force-bearing block at one end of the positioning plate will squeeze the mounting shaft when it passes the locking block. When the mounting shaft rotates, it applies a torsional force to the torsion spring. At the same time, the resistance applied to the force-bearing block causes the spring to be squeezed. When the force-bearing block passes the locking block, the locking block resets through the torsion spring, and the spring also resets. The reset process causes vibration, and the material adhering to the stirring structure and the outer wall of the heat exchange tube is subjected to vibration force, causing the material to detach.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. This utility model uses a spiral heat exchange tube in conjunction with a cooler to circulate and transport the cooling medium inside the vessel. The cooling medium radiates to both the inner and outer walls simultaneously, achieving rapid cooling of the material, improving cooling efficiency, and facilitating the crystallization process of high-purity arsenic. The stirring structure is installed on the outside of the heat exchange tube to stir the material inside. After stirring, both the heat exchange tube and the stirring structure can be raised and isolated from the processing chamber, preventing crystals from adhering to the heat exchange structure and the stirring structure, and facilitating the cleaning of the inside of the vessel after use. Attached Figure Description

[0015] Figure 1 This is a front-view three-dimensional structural diagram of the present invention;

[0016] Figure 2 This is a front-view three-dimensional structural diagram of the internal structure of the vessel body of this utility model;

[0017] Figure 3 This is a top view of the support ring of this utility model.

[0018] Figure 4 This is a top-view three-dimensional structural diagram of the lifting plate of this utility model;

[0019] Figure 5 This is a top-view three-dimensional structural diagram of the guide plate of this utility model.

[0020] Reference numerals: 1. Vessel body; 2. Lower cavity; 3. Upper cavity; 4. Support; 5. Motor 1; 6. Condenser; 7. Feed pipe; 8. Hose; 9. Screw; 10. Lifting plate; 11. Guide rod; 12. Force-bearing block; 13. Guide plate; 14. Connecting plate; 15. Connecting rod; 16. Heat exchange tube; 17. Base plate; 18. Conical surface; 19. Guide bucket; 20. Side rod; 21. Support ring; 22. Screw hole; 23. Bearing seat; 24. Positioning rod; 25. Through hole; 26. Spring; 27. Motor 2; 28. Gear; 29. ​​Gear ring; 30. Rotating ring; 31. Ring seat; 32. Mounting bracket; 33. Torsion spring; 34. Mounting shaft; 35. Clamping block; 36. Positioning plate. Detailed Implementation

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

[0022] like Figures 1-5As shown, this utility model proposes a circulating cooling high-purity arsenic crystallizer, including a vessel body 1, a motor 5, a condenser 6, a lifting plate 10, a guide plate 13, a connecting plate 14, and a bottom plate 17. The bottom plate 17 is located inside the lower end of the vessel body 1, and a spiral heat exchange tube 16 is installed on the upper end of the bottom plate 17. The condenser 6 and motor 5 are located on the upper end of the vessel body 1. A support ring 21 is installed on the inner wall of the vessel body 1, and the lifting plate 10 and guide plate 13 are located above the support ring 21. Symmetrically distributed connecting plates 14 are located on one side of the upper end of the bottom plate 17. The upper end of the lifting plate 10 has a screw hole 22 for threaded connection with the screw 9. The guide plate 13 is slidably sleeved on the outer wall of the guide rod 11. A ring seat 31 is provided between the connecting plates 14. A rotating ring 30 is rotatably installed inside the ring seat 31. A gear ring 29 is provided on the upper end of the rotating ring 30. A motor 27 is provided on one end of the connecting plate 14. A gear 28 that meshes with the gear ring 29 is provided on the output end of the motor 27. A connecting rod 15 distributed in a ring array is provided on the lower end of the rotating ring 30. Side rods 20 distributed in a ring array are provided on the outer wall of the connecting rod 15.

[0023] The vessel body 1 is provided with an upper cavity 3 and a lower cavity 2, and the support ring 21 is located on the inner wall of the upper end of the lower cavity 2;

[0024] A support 4 is fitted onto the outer wall of the vessel body 1. A feed pipe 7, which is connected to a lower cavity 2 and controlled to open and close by a valve, is installed inside one end of the vessel body 1.

[0025] The upper end of the support ring 21 is provided with a bearing seat 23, and the lower end of the screw 9 is rotatably installed inside the bearing seat 23;

[0026] Both ends of the heat exchange tube 16 are equipped with flexible hoses 8 that are connected to the condenser 6;

[0027] A conical surface 18 is provided at the upper end of the bottom plate 17, the outer diameter of the bottom plate 17 is larger than the inner diameter of the support ring 21, and a guide bucket 19 is provided on the inner wall of the lower end of the vessel body 1.

[0028] The upper end of the connecting plate 14 is provided with a spring 26 that is connected to the lifting plate 10 and the guide plate 13. The lifting plate 10 and the guide plate 13 are both provided with through holes 25. The upper end of the connecting plate 14 is provided with a positioning rod 24 that passes through the spring 26 and is slidably inserted into the through hole 25.

[0029] A positioning plate 36 is provided on the upper end of the base plate 17. A force-bearing block 12 is provided at an equal distance on one end of the positioning plate 36. A mounting bracket 32 ​​is provided on the inner wall of the upper end of the vessel body 1. A mounting shaft 34 is rotatably mounted inside the lower end of the mounting bracket. A locking block 35 is provided on one end of the mounting shaft 34. A torsion spring 33 is sleeved on the outside of the mounting shaft 34, with both ends connected to the locking block 35 and the mounting bracket 32 ​​respectively.

[0030] Implementation steps based on Example 1: Usage method and technical principles

[0031] When in use, first securely support the equipment with bracket 4, then turn on the condenser 6 to allow the cooling medium to circulate through the hose 8 in the spiral heat exchange tube 16. The refrigerant cooling medium, such as Freon or ammonia, is pressurized by the compressor and enters the condenser 6 shell in a high-temperature, high-pressure gaseous form. When the gaseous medium flows in the pipes of the condenser 6, it exchanges heat with the outside air or cooling water through the heat sink of the shell. The temperature drops below the dew point, and a phase change occurs, condensing into a liquid state. The condensed liquid cooling medium is then transported through the pipe to the inlet of the heat exchange tube 16 to complete the cooling cycle. The heat exchange tube 16 is connected to the condenser 6 in a closed loop through a parallel structure of double hoses 8. The condenser 6 is equipped with two dedicated interfaces, including a liquid medium outlet and a gaseous medium inlet, connecting the liquid outlet of the condenser 6 to the inlet of the heat exchange tube 16. The corrugated metal hose 8 is used, with an inner layer of PTFE material, allowing the liquid medium to flow in a wide temperature range from -40℃ to 260℃.

[0032] High-purity arsenic raw material is injected into the lower cavity 2 through the valve of the feed pipe 7. During this process, the motor 27 drives the gear 28 to rotate the rotating ring 30. The connecting rod 15 and the side rod 20 of the ring array stir the molten arsenic in multiple dimensions. With the bidirectional radiation cooling medium of the spiral heat exchange tube 16, heat is transferred to the material through the inner wall of the tube and radiated to the upper cavity 3 through the outer wall of the tube, forming a highly efficient heat exchange mechanism with internal and external coordination. Subsequently, the motor 5 is started to drive the lifting plate 10 to descend along the guide rod 11, so that the bottom plate 17 and the support ring 21 are sealed and fitted. At this time, the upper cavity 3 and the lower cavity 2 are completely isolated. After the material in the lower cavity 2 completes sublimation at a high temperature of 820℃, it enters the directional crystallization stage. When the crystallization is completed and cooling is required, the control system adjusts the temperature at a rate of 100-300℃ / h. The spiral structure of the spiral heat exchange tube 16 extends the cooling path. With the continuous circulation of the condenser 6, the cooling efficiency is improved.

[0033] After cooling to a safe temperature, motor 5 reverses and lifts the lifting plate 10, causing the bottom plate 17 and heat exchange tube 16 to rise as a whole to the upper cavity 3 of the vessel body 1. At this time, the connecting plate 14 maintains longitudinal movement through the elastic compensation of the spring 26, and the positioning rod 24 slides in the through hole 25 to ensure structural stability. When the bottom plate 17 is lifted, its conical surface 18 design allows the residual material to flow naturally to the periphery of the lower cavity 2. When the force block 12 on the positioning plate 36 passes through the locking block 35 at the mounting bracket 32, it triggers the vibration mechanism driven by the torsion spring 33, generating vibration, causing the arsenic crystals adhering to the stirring rod and the outer wall of the heat exchange tube 16 to fall off during the vibration.

[0034] Traditional crystallizers dissipate heat only through unidirectional radiation from the outer wall of the equipment. In this device, the spiral heat exchange tube 16 simultaneously achieves internal heat conduction and external radiation, thereby improving heat exchange efficiency and shortening the crystallization cycle. The lifting plate 10 achieves physical isolation between the processing chamber and the cooling system, improving the efficiency and cleanliness issues in the high-purity arsenic crystallization process.

[0035] The above specific embodiments are merely several preferred embodiments of this utility model. Based on the technical solution of this utility model and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

[0036] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A circulating cooling high-purity arsenic crystallizer, comprising a vessel body (1), a motor (5), a condenser (6), a lifting plate (10), a guide plate (13), a connecting plate (14), and a bottom plate (17), characterized in that: The lower end of the vessel body (1) is provided with a bottom plate (17), the upper end of the bottom plate (17) is provided with a spiral heat exchange tube (16), the upper end of the vessel body (1) is provided with a condenser (6), the upper end of the vessel body (1) is provided with a motor (5), the inner wall of the vessel body (1) is provided with a support ring (21), the upper part of the support ring (21) is provided with a lifting plate (10) and a guide plate (13), the upper end of the bottom plate (17) is provided with symmetrically distributed connecting plates (14), the upper end of the lifting plate (10) is provided with a screw hole (22) for threaded connection with the screw (9), and so on. The guide plate (13) is slidably sleeved on the outer wall of the guide rod (11). A ring seat (31) is provided between the connecting plates (14). A rotating ring (30) is rotatably installed inside the ring seat (31). A gear ring (29) is provided at the upper end of the rotating ring (30). A motor (27) is provided at one end of the connecting plate (14). A gear (28) that meshes with the gear ring (29) is provided at the output end of the motor (27). A connecting rod (15) arranged in a ring array is provided at the lower end of the rotating ring (30). A side rod (20) arranged in a ring array is provided on the outer wall of the connecting rod (15).

2. The circulating cooling high-purity arsenic crystallizer according to claim 1, characterized in that: The vessel body (1) is provided with an upper cavity (3) and a lower cavity (2), and the support ring (21) is located on the inner wall of the upper end of the lower cavity (2).

3. The circulating cooling high-purity arsenic crystallizer according to claim 1, characterized in that: The outer wall of the vessel body (1) is fitted with a bracket (4), and one end of the vessel body (1) is connected to a lower cavity (2) and a feed pipe (7) that is controlled by a valve.

4. The circulating cooling high-purity arsenic crystallizer according to claim 1, characterized in that: The upper end of the support ring (21) is provided with a bearing seat (23), and the lower end of the screw (9) is rotatably installed inside the bearing seat (23).

5. A circulating cooling high-purity arsenic crystallizer according to claim 1, characterized in that: Both ends of the heat exchange tube (16) are provided with flexible hoses (8) that communicate with the condenser (6).

6. The circulating cooling high-purity arsenic crystallizer according to claim 1, characterized in that: The bottom plate (17) has a conical surface (18) at its upper end. The outer diameter of the bottom plate (17) is larger than the inner diameter of the support ring (21). The inner wall of the lower end of the vessel body (1) is provided with a guide bucket (19).

7. The circulating cooling high-purity arsenic crystallizer according to claim 1, characterized in that: The upper end of the connecting plate (14) is provided with a spring (26) that is connected to the lifting plate (10) and the guide plate (13). The lifting plate (10) and the guide plate (13) are both provided with through holes (25). The upper end of the connecting plate (14) is provided with a positioning rod (24) that passes through the spring (26) and is slidably inserted into the through hole (25).

8. A circulating cooling high-purity arsenic crystallizer according to claim 1, characterized in that: A positioning plate (36) is provided on the upper end of the base plate (17). A force-bearing block (12) is provided at one end of the positioning plate (36). A mounting bracket (32) is provided on the inner wall of the upper end of the vessel body (1). A mounting shaft (34) is rotatably mounted inside the lower end of the mounting bracket. A locking block (35) is provided on one end of the mounting shaft (34). A torsion spring (33) is sleeved on the outer side of the mounting shaft (34) and its two ends are respectively connected to the locking block (35) and the mounting bracket (32).

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