Anhydrous potassium fluoride spray drying apparatus

Abstract

The utility model relates to anhydrous potassium fluoride processing technical field especially an anhydrous potassium fluoride spray drying device, including vertical collection jar, be provided with the conical flow guide portion at the bottom of vertical collection jar, the positioning disc is fixedly installed on the lower part outside wall of vertical collection jar, a plurality of ground connection columns are fixedly installed in the bottom both sides interval of positioning disc, the top opening of vertical collection jar is installed the solution vaporization unit above. The utility model discloses through the circumferential uniform arrangement of atomizing nozzle in solution vaporization unit and the stereoscopic high temperature blowing design of annular multistage dryer, cooperate the horizontal setting of high temperature nozzle and the oblique downward setting of atomizing nozzle, greatly increase the contact area and contact time of potassium fluoride solution atomization droplet and high temperature airflow, effectively promote the water liquid vaporization efficiency, ensure that potassium fluoride crude product dries fully.

Description

Technical Field

[0001] This utility model relates to the field of anhydrous potassium fluoride treatment technology, and in particular to an anhydrous potassium fluoride spray drying device. Background Technology

[0002] Anhydrous potassium fluoride, as an important chemical raw material, has wide applications in many fields, such as etching in glass processing, serving as an electrolyte additive in the electroplating industry, and acting as a catalyst in organic synthesis reactions. Spray drying is a crucial step in its preparation process, aiming to remove moisture from the potassium fluoride solution to obtain anhydrous potassium fluoride products that meet the purity and particle size requirements.

[0003] For example, a device and method for improving the spray drying quality of potassium fluoride disclosed in patent publication number CN118304666B mainly includes a reaction tank, a filling assembly, and a stirring column. Multiple stirring plates are fixed on the stirring column, and pressure nozzles are connected to the stirring plates. The stirring plates are threadedly connected to a reciprocating screw. A filling assembly is provided on the stirring column, and the filling assembly is connected to the reciprocating screw through a through hole. The lower end of the filling assembly is connected to an air inlet box through a vent pipe. The vent pipe is fixed on the reaction tank, and the air inlet box is connected to a hot air blower. A filter plate is provided inside the air inlet box. A cleaning assembly is provided on the stirring column. The reaction tank is connected to a cyclone separator through a discharge pipe. The lower end of the cyclone separator is connected to a collection box. A steam pipe is fixed on the cyclone separator, and the steam pipe is connected to a steam box, etc.

[0004] It can be seen that when the above-mentioned device processes anhydrous potassium fluoride solution, it mainly uses a stirring column to drive a stirring plate to stir the solution, while simultaneously using pressure nozzles to atomize the solution, combined with hot air input from the air inlet box to achieve drying, and then a cyclone separator to separate and collect the product. However, its actual processing technology has the following problems: First, the hot air enters the reaction vessel through a single channel via the ventilation pipe, resulting in a limited and uneven contact area with the atomized potassium fluoride droplets. Some droplets cannot fully exchange heat with the hot air, leading to low drying efficiency and potentially incomplete drying in certain areas, which affects product purity.

[0005] Secondly, the filter plate in the device is only installed in the air inlet box, which can only perform preliminary filtration of the incoming hot air. During long-term operation, the atomized potassium fluoride droplets inside the reaction tank may adhere to the surface of components such as the stirring column and stirring plate and form deposits. If these deposits fall off, they will mix into the product. Moreover, the existing cleaning components are only for specific components, and the cleaning range is limited, making it difficult to effectively avoid the impact of deposits on product purity.

[0006] Based on this, it is necessary to design an anhydrous potassium fluoride spray drying device that can achieve full and uniform contact between hot air and atomized droplets, and at the same time thoroughly clean the accumulated material inside the device to ensure product purity. Utility Model Content

[0007] To solve one of the aforementioned technical problems, the present invention provides a spray drying device for anhydrous potassium fluoride. This device is installed on an anhydrous potassium fluoride production line and is used to achieve the drying process at the front end of the potassium fluoride solution. The device includes a vertical collecting tank with a conical guide section at the bottom. The bottom outlet of the conical guide section is connected to a downstream pumping pipeline to transport the dried potassium fluoride concentrate to the downstream deep drying process. A positioning plate is fixedly installed on the lower outer wall of the vertical collecting tank. Several ground-connecting columns are fixedly installed at intervals on both sides of the bottom of the positioning plate. A solution vaporization unit is installed above the top opening of the vertical collecting tank. The solution vaporization unit is used to vaporize the potassium fluoride solution by blowing it with high-temperature hot air, causing the vaporized solution to overflow upwards. Both ends of the solution vaporization unit are fixedly supported above the collecting tank by vertical support members on both sides.

[0008] Based on any of the above technical solutions, a further optimization is made as follows: the solution vaporization unit includes a vertically and fixedly installed collection tank. Several atomizing nozzles are evenly spaced along the circumference of the bottom of the collection tank. Each atomizing nozzle is used to spray atomized potassium fluoride solution downwards at an angle. A flexible inlet tube is connected to the top inlet of the collection tank. A pressure pump is configured upstream of the flexible inlet tube and is used to connect to the potassium fluoride solution supply end. A ring-shaped multi-stage dryer is coaxially installed below the collection tank. The ring-shaped multi-stage dryer is used to blow the potassium fluoride solution sprayed from the atomizing nozzles above it at high temperature. The vaporized water at high temperature moves upwards and overflows along the top of the vertical collection tank. The dried potassium fluoride crystals fall downwards into the collection chamber of the vertical collection tank.

[0009] Based on any of the above technical solutions, the following optimization is made: a connecting plate is coaxially fixed on the upper outer wall of the liquid collection tank, and synchronous lifting cylinders are respectively fixed above the left and right sides of the connecting plate. The top of the cylinder bodies of the two synchronous lifting cylinders are fixed on the vertical support, and the two synchronous lifting cylinders are in a synchronous lifting state when working. The extent to which the solution vaporization unit enters the collection chamber can be controlled by adjusting the extension and retraction states of the two synchronous lifting cylinders.

[0010] Based on any of the above technical solutions, a further optimization is made as follows: the vertical support includes two top fixing seats that are symmetrically fixed on the upper outer side wall of the vertical collection tank. A support column is fixedly installed on the top of each of the two top fixing seats. A horizontal seat is fixed on the top of each support column. The bottom of the inner end of each horizontal seat is fixedly connected to the top of the cylinder body of the synchronous lifting cylinder at its corresponding position.

[0011] Based on any of the above technical solutions, a further optimization is made as follows: the annular multi-stage dryer includes several annular air pipes spaced apart from top to bottom. Adjacent annular air pipes are connected by vertical air pipes. The top annular air pipe is fixed to the outer wall of the liquid collection tank through several connecting brackets. Each annular air pipe is coaxially arranged with the liquid collection tank. A high-temperature air intake pipe is fixedly connected to the top left side of the topmost annular air pipe. The high-temperature air intake pipe is connected to an external high-temperature fan. Several high-temperature nozzles are fixedly installed at even intervals along the circumference on the inner side wall of each annular air pipe. Each high-temperature nozzle is used to spray high-temperature airflow outward and vaporize the atomized potassium fluoride solution at high temperature.

[0012] Based on any of the above technical solutions, a further optimization is made: all the high-temperature nozzles are set horizontally.

[0013] Based on any of the above technical solutions, a further optimization is made: all the atomizing nozzles are set at an angle downwards.

[0014] Based on any of the above technical solutions, the following further optimization is made: the top and bottom of each of the annular air tubes are horizontal planes, and the outer sidewalls of each of the annular air tubes abut against the inner sidewall of the collection chamber. When each of the synchronous lifting cylinders extends downwards, it causes the outer wall of each of the annular air pipes to abut against the inner wall of the collection chamber and scrape the material from its inner wall.

[0015] Based on any of the above technical solutions, a further optimization is made: both of the synchronous lifting cylinders adopt multi-stage telescopic hydraulic cylinders with synchronous control, and each of the hydraulic cylinders is controlled by an externally configured hydraulic system.

[0016] Based on any of the above technical solutions, a further optimization is made as follows: an electric heating tube is spirally wound around the periphery of the vertical collection tank, and a heat insulation sleeve is provided around the electric heating tube.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model, through the circumferentially uniform arrangement of atomizing nozzles in the solution vaporization unit and the three-dimensional high-temperature blowing design of the annular multi-stage dryer, combined with the horizontal setting of the high-temperature nozzles and the downward tilting setting of the atomizing nozzles, significantly increases the contact area and contact time between the potassium fluoride solution atomized droplets and the high-temperature airflow, effectively improving the vaporization efficiency of the water solution, ensuring sufficient drying of the initial potassium fluoride product, and significantly optimizing the processing effect and processing rate of the front-end drying process of the anhydrous potassium fluoride production line.

[0018] 2. This utility model utilizes the functional cooperation of a synchronous lifting cylinder and an annular gas pipe. When the synchronous lifting cylinder drives the solution vaporization unit to rise and fall, the outer wall of the annular gas pipe can simultaneously and quickly scrape the inner wall of the collection chamber of the vertical collection tank, eliminating the need for an additional dedicated scraping device. At the same time, the synchronous lifting cylinder can move the solution vaporization unit out of the collection chamber for maintenance, which simplifies the device structure, reduces equipment costs, and greatly improves the ease of operation and maintenance efficiency of the device.

[0019] 3. This utility model effectively reduces the residue and adhesion of potassium fluoride raw materials at the bottom and inner wall of the vertical collection tank by integrating the inclined guiding design of the conical guide section, the scraping function of the annular gas pipe, and the preheating and anti-sticking effect of the inner wall of the collection chamber. This avoids material waste, significantly improves the material recovery rate in the production process of anhydrous potassium fluoride, and reduces the production cost of enterprises.

[0020] 4. This utility model uses a synchronously controlled multi-stage telescopic hydraulic cylinder as a synchronous lifting cylinder, which can flexibly adjust the amplitude of the solution vaporization unit entering the collection chamber. Combined with the airflow regulation redundancy of the annular multi-stage dryer, it can adapt to the drying requirements of potassium fluoride solutions with different concentrations and processing volumes. At the same time, when the production line load fluctuates, the vertical collection tank can achieve material buffering, which greatly improves the adaptability and operational stability of the device to different working conditions of the anhydrous potassium fluoride production line. Attached Figure Description

[0021] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or components are generally identified by similar reference numerals. In the drawings, the elements or components are not necessarily drawn to scale.

[0022] Figure 1 This is a schematic diagram of the main structure of this utility model.

[0023] Figure 2 This is a schematic diagram of a partial internal structure of the present invention.

[0024] Figure 3 This is a partial three-dimensional structural schematic diagram of the present invention.

[0025] Figure 4 This is a schematic diagram of the solution vaporization unit structure of this utility model.

[0026] Figure 5 This is a top view of the structure of this utility model.

[0027] Figure 6 This is a three-dimensional structural schematic diagram of the solution vaporization unit of this utility model.

[0028] In the diagram, 1. Vertical collection tank; 101. Collection chamber; 2. Conical guide section; 3. Positioning plate; 4. Ground connecting column; 5. Liquid collection tank; 6. Atomizing nozzle; 7. Flexible infusion tube; 8. Connecting plate; 9. Synchronous lifting cylinder; 10. Top fixed seat; 11. Support column; 12. Horizontal seat; 13. Annular air pipe; 14. Vertical air pipe; 15. Connecting frame; 16. High-temperature air intake pipe; 17. High-temperature nozzle; 18. Electric heating tube; 19. Insulation sleeve. Detailed Implementation

[0029] The embodiments of the present utility model will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of the present utility model, and are therefore merely examples and should not be construed as limiting the scope of protection of the present utility model. The specific structure of the present utility model is as follows: Figures 1-6 As shown in the image.

[0030] Example 1: An anhydrous potassium fluoride spray drying device, the device is installed on an anhydrous potassium fluoride production line and is used to realize the drying process of the potassium fluoride solution at the front end. The device includes a vertical collection tank 1, and a conical guide section 2 is provided at the bottom of the vertical collection tank 1. The bottom outlet of the conical guide section 2 is used to connect to the downstream pumping pipeline and transport the dried potassium fluoride primary product to the downstream deep drying process. A positioning plate 3 is fixedly installed on the lower outer wall of the vertical collection tank 1. Several ground connecting columns 4 are fixedly installed at intervals on both sides of the bottom of the positioning plate 3. The solution vaporization unit is installed above the top opening of the vertical collection tank 1. The solution vaporization unit is used to vaporize the potassium fluoride solution by blowing it with high temperature hot air and then overflowing upwards. Both ends of the solution vaporization unit are fixedly supported above the collection tank by vertical support members on both sides.

[0031] The anhydrous potassium fluoride spray dryer, as the core equipment of the front-end drying process in the anhydrous potassium fluoride production line, uses a vertical collection tank 1 as its core carrier in its overall workflow. The device is fixed in place by the cooperation of the grounding column 4 and the positioning plate 3, ensuring the stability of the device during operation. The solution vaporization unit processes the input potassium fluoride solution, using high-temperature hot air to rapidly vaporize the water in the potassium fluoride solution. The vaporized water overflows upwards from the top opening of the vertical collection tank 1, completing the initial separation of water and potassium fluoride solids. Finally, the initial potassium fluoride product formed after drying accumulates in the vertical collection tank 1, and is then guided by the conical guide section 2 at the bottom, entering the downstream pumping pipeline through the bottom outlet, and finally being transported to the downstream deep drying process, realizing the connection between the front-end drying process and the subsequent processes.

[0032] The vertical collection tank 1 structure, compared to the horizontal structure, can make fuller use of gravity to achieve the natural aggregation and falling of potassium fluoride primary product, reducing the residue of potassium fluoride primary product in the tank; the design of the conical guide section 2, its inclined surface can guide the potassium fluoride primary product to converge towards the bottom outlet, avoiding the accumulation of potassium fluoride primary product at the bottom of the vertical collection tank 1, and ensuring the smoothness of material transportation.

[0033] Based on any of the above technical solutions, a further optimization is made as follows: the solution vaporization unit includes a vertically and fixedly arranged collection tank 5. A plurality of atomizing nozzles 6 are evenly spaced along the circumference of the bottom of the collection tank 5. Each atomizing nozzle 6 is used to spray the atomized potassium fluoride solution downward at an angle. A flexible inlet tube 7 is connected to the top inlet of the collection tank 5. A pressure pump is configured upstream of the flexible inlet tube 7 and is used to connect to the potassium fluoride solution supply end. A ring-shaped multi-stage dryer is coaxially arranged below the collection tank 5. The ring-shaped multi-stage dryer is used to blow the potassium fluoride solution sprayed by each atomizing nozzle 6 above it at high temperature. The vaporized water at high temperature moves upward and overflows along the top of the vertical collection tank 1. The potassium fluoride crystals precipitated after drying fall downward into the collection chamber 101 of the vertical collection tank 1.

[0034] The working process of the solution vaporization unit is centered on the collection tank 5 as the core for solution storage and distribution, as follows: First, the potassium fluoride solution from the supply end is transported to the collection tank 5 under the pressure of the pressure pump through the flexible delivery tube 7. The collection tank 5 temporarily stores the solution and achieves uniform distribution. Next, several atomizing nozzles 6 evenly spaced circumferentially at the bottom of the collection tank 5 convert the potassium fluoride solution in the collection tank 5 into an atomized state and spray it out in a downward tilting direction. At the same time, the annular multi-stage dryer, which is coaxial with the collection tank 5, is activated and sprays a high-temperature airflow into the atomized potassium fluoride solution, blowing the atomized solution at high temperature. The water in the atomized solution vaporizes rapidly under the action of high temperature. Finally, the vaporized water, because its density is less than that of air, moves upward along the internal space of the vertical collection tank 1 and eventually overflows from the top opening of the vertical collection tank 1. The potassium fluoride crystals that have been dried and precipitated fall downward into the collection chamber 101 of the vertical collection tank 1 due to their own gravity, completing the separation of water and potassium fluoride solids.

[0035] Several atomizing nozzles 6 are evenly spaced along the bottom circumference of the collection tank 5 and are inclined downward sprayed. This allows the potassium fluoride solution to be atomized and form a uniformly distributed atomized area below the collection tank 5, avoiding local accumulation of the atomized solution and ensuring the uniformity of subsequent high-temperature blowing.

[0036] The annular multi-stage dryer is coaxially arranged with the liquid collection tank 5. The high-temperature airflow it sprays can directly act on the atomized potassium fluoride solution. The annular structure can wrap the atomized area with high-temperature airflow from the circumference, increasing the contact area between the high-temperature airflow and the atomized solution. At the same time, the multi-stage design can realize the layered blowing of high-temperature airflow, further improving the heat exchange efficiency and ensuring that the water in the atomized solution is fully vaporized.

[0037] The flexible infusion tube 7 has better flexibility than rigid pipes, which can adapt to possible positional adjustments of the collection tank 5 (such as the lifting action driven by the subsequent synchronous lifting cylinder 9), and at the same time facilitates the connection and installation between the solution vaporization unit and the potassium fluoride solution supply end, reducing the difficulty of pipeline layout.

[0038] The separation of liquid water and solid potassium fluoride is achieved by high-temperature vaporization. Compared with physical filtration and other separation methods, it is more suitable for drying potassium fluoride solutions. It can effectively remove liquid water from the solution, and the potassium fluoride crystals precipitated after drying fall directly into the collection chamber 101. The separation process is simple, efficient and the separation effect is stable and reliable.

[0039] Based on any of the above technical solutions, the following further optimization is made: a connecting plate 8 is coaxially fixed on the upper outer wall of the liquid collection tank 5, and synchronous lifting cylinders 9 are respectively fixed above the left and right sides of the connecting plate 8. The top of the cylinder body of the two synchronous lifting cylinders 9 is fixed on the vertical support member, and the two synchronous lifting cylinders 9 are in a synchronous lifting state when working. By controlling the extension and retraction states of the two synchronous lifting cylinders 9, the extent to which the solution vaporization unit enters the collection chamber 101 can be controlled.

[0040] The synchronous lifting structure uses a connecting plate 8 as the connecting structure to connect the synchronous lifting cylinders 9 and the liquid collecting tank 5, thereby controlling the lifting of the solution vaporization unit. The specific working principle is as follows: First, the connecting plate 8 is coaxially fixed to the upper outer wall of the liquid collecting tank 5, forming a stable integral structure between the connecting plate 8 and the liquid collecting tank 5. Next, the tops of the cylinder bodies of the two synchronous lifting cylinders 9 are fixed to the vertical support, keeping the cylinder body position fixed, while the bottom of the piston rods of the synchronous lifting cylinders 9 are fixedly connected to the upper left and right sides of the connecting plate 8. When the device needs to adjust the amplitude of the solution vaporization unit entering the collection chamber 101 of the vertical collecting tank 1, the two synchronous lifting cylinders 9 are controlled to lift simultaneously... Synchronous Lifting Cylinder 9 extends: When the synchronous lifting cylinder 9 extends, the piston rod pushes the connecting plate 8 downward, causing the liquid collection tank 5 and the atomizing nozzle 6 and the annular multi-stage dryer associated with the liquid collection tank 5 to move downward as a whole, increasing the amplitude of the solution vaporization unit entering the collection chamber 101; when the synchronous lifting cylinder 9 shortens, the piston rod pulls the connecting plate 8 upward, causing the liquid collection tank 5 and related components to move upward as a whole, reducing the amplitude of the solution vaporization unit entering the collection chamber 101; since the two synchronous lifting cylinders 9 maintain synchronous lifting and lowering in the working state, it can ensure that the liquid collection tank 5 always remains vertical during the lifting and lowering process, avoiding the tilting of the liquid collection tank 5 due to asynchronous lifting and lowering on both sides.

[0041] By adjusting the amplitude of the solution vaporization unit entering the collection chamber 101, the distance between the atomized solution and the inner wall of the collection chamber 101, and the diffusion range of the high-temperature airflow in the collection chamber 101 can be changed, enabling the device to adapt to the drying requirements under different working conditions and improving the overall adaptability of the device.

[0042] Based on any of the above technical solutions, the following further optimization is made: the vertical support includes two top fixing seats 10 that are symmetrically fixed on the upper outer side wall of the vertical collection tank 1. A support column 11 is fixedly installed on the top of each of the two top fixing seats 10. A horizontal seat 12 is fixed on the top of each support column 11. The bottom of the inner end of each horizontal seat 12 is fixedly connected to the top of the cylinder body of the synchronous lifting cylinder 9 at the corresponding position.

[0043] The vertical support serves as the fixed carrier for the synchronous lifting cylinder 9. Its working principle revolves around providing stable support for the synchronous lifting cylinder 9, as follows: First, two top fixing seats 10 are symmetrically fixed to the upper outer wall of the vertical collection tank 1, utilizing the structural strength of the vertical collection tank 1 itself to provide a stable installation foundation for the top fixing seats 10. Next, the support column 11 is fixedly installed on the top of the top fixing seat 10, extending vertically to raise the support height to a position suitable for the installation of the synchronous lifting cylinder 9. Then, the horizontal seat 12 is fixed on the top of the support column 11, extending horizontally towards the liquid collection tank 5. Finally, the top of the cylinder body of the synchronous lifting cylinder 9 is fixed to the bottom of the inner end of the horizontal seat 12. Through the sequential connection of the top fixing seat 10, the support column 11, and the horizontal seat 12, the synchronous lifting cylinder 9 is stably supported above the vertical collection tank 1. Furthermore, due to the symmetrical arrangement of the two vertical support components, it is ensured that the two synchronous lifting cylinders 9 are in symmetrical positions after installation, providing a structural foundation for their subsequent synchronous lifting operation.

[0044] Based on any of the above technical solutions, a further optimization is made as follows: the annular multi-stage dryer includes several annular air pipes 13 spaced apart from top to bottom. Two adjacent annular air pipes 13 are connected by vertical air pipes 14. The top annular air pipe 13 is fixed to the outer wall of the liquid collection tank 5 through several connecting brackets 15. Each annular air pipe 13 is coaxially arranged with the liquid collection tank 5. A high-temperature air intake pipe 16 is fixedly connected to the top left side of the topmost annular air pipe 13. The high-temperature air intake pipe 16 is connected to an external high-temperature fan. Several high-temperature nozzles 17 are fixedly installed at even intervals along the circumference on the inner side wall of each annular air pipe 13. Each high-temperature nozzle 17 is used to spray high-temperature airflow outward and vaporize the atomized potassium fluoride solution at high temperature.

[0045] The working process of the annular multi-stage dryer is centered on the delivery and spraying of high-temperature airflow, as follows: First, the high-temperature airflow generated by the external high-temperature fan is delivered to the top annular air pipe 13 through the high-temperature air intake pipe 16; then, since adjacent annular air pipes 13 are connected by vertical air pipes 14, the high-temperature airflow flows from the top annular air pipe 13 into each of the lower annular air pipes 13 sequentially through the vertical air pipes 14, thus distributing the high-temperature airflow among several annular air pipes 13; then, high-temperature nozzles 17, evenly spaced along the circumference on the inner wall of each annular air pipe 13, spray the high-temperature airflow from the annular air pipe 13 outward; since each annular air pipe 13 is coaxially arranged with the liquid collection tank 5, and the high-temperature nozzles 17 are located on the inner wall of the annular air pipe 13, the sprayed high-temperature airflow forms an annular high-temperature airflow area centered on the liquid collection tank 5, which performs all-round, multi-layer high-temperature blowing on the atomized potassium fluoride solution sprayed from the upper atomizing nozzle 6; finally, the water in the atomized solution rapidly vaporizes under the action of the high-temperature airflow, achieving the drying effect.

[0046] Several annular air pipes 13 are spaced apart from top to bottom, and the high-temperature nozzles 17 on the inner sidewall of each annular air pipe 13 are evenly distributed along the circumference, so that the high-temperature airflow can form annular spray areas at different heights, forming a three-dimensional enveloping and blowing of the atomized solution, avoiding blind spots covered by the high-temperature airflow, and ensuring that all parts of the water in the atomized solution can be fully vaporized.

[0047] The structure of the annular air pipe 13 is adopted, and the vertical air pipe 14 is connected to the adjacent annular air pipe 13 so that the high temperature airflow can be evenly distributed in each annular air pipe 13, ensuring that the pressure and flow rate of the high temperature airflow sprayed by each high temperature nozzle 17 are basically consistent, and avoiding insufficient drying due to insufficient local airflow pressure.

[0048] The top annular air pipe 13 is fixed to the outer wall of the liquid collection tank 5 through several connecting frames 15, so that the annular multi-stage dryer and the liquid collection tank 5 form an integral structure. It can move synchronously during the lifting and lowering of the solution vaporization unit, and at the same time ensure the structural stability of the annular air pipe 13 when the reaction force generated by the high temperature air jet is generated.

[0049] Example 2: Compared with Example 1, this example also includes the following technical features: Based on any of the above technical solutions, a further optimization is made: all the high-temperature nozzles 17 are set horizontally.

[0050] After each high-temperature nozzle 17 is set horizontally, its spray direction is horizontal outward (centered on the center of the annular air pipe 13). The specific working principle is as follows: When the high-temperature airflow enters the annular air pipe 13, the horizontally set high-temperature nozzles 17 spray the high-temperature airflow out in the horizontal direction, forming an annular horizontal high-temperature airflow layer parallel to the plane where the annular air pipe 13 is located. Since the annular multi-stage dryer is set with several annular air pipes 13 at intervals from top to bottom, the horizontal high-temperature nozzles 17 of each annular air pipe 13 together form several horizontally distributed high-temperature airflow layers. The atomized potassium fluoride solution sprayed obliquely downward from the atomizing nozzle 6 will pass through these horizontal high-temperature airflow layers in sequence during the falling process, and fully contact the high-temperature airflow. The water in the atomized solution will vaporize under the blowing and heating action of the horizontal high-temperature airflow, thus achieving drying.

[0051] Based on any of the above technical solutions, a further optimization is made: all the atomizing nozzles 6 are set at an angle downwards.

[0052] After each atomizing nozzle 6 is set at an angle downwards, its spray direction forms a certain angle with the vertical direction (sloping downwards). The working principle is as follows: After the potassium fluoride solution is distributed to each atomizing nozzle 6 through the collection tank 5, the atomizing nozzle 6 atomizes the solution and sprays it out in a downward-sloping direction, so that the atomized droplets form a downward-sloping trajectory. Since multiple atomizing nozzles 6 are evenly distributed around the bottom of the collection tank 5, the downward-sloping atomized droplets form a cone-shaped atomization area below the collection tank 5 (the apex is at the bottom of the collection tank 5, spreading downwards). This cone-shaped atomization area cross-contacts with the high-temperature airflow (such as horizontal airflow) sprayed by the annular multi-stage dryer. The atomized droplets continue to interact with the high-temperature airflow during the falling process, and the water gradually vaporizes. Finally, the dried potassium fluoride crystals continue to fall into the collection chamber 101 of the vertical collection tank 1.

[0053] Based on any of the above technical solutions, the following further optimization is made: the top and bottom of each of the annular air pipes 13 are both horizontal planes, and the outer sidewall of each of the annular air pipes 13 abuts against the inner sidewall of the collection chamber 101; when each of the synchronous lifting cylinders 9 extends downward, it drives the outer sidewall of each of the annular air pipes 13 to abut against the inner wall of the collection chamber 101 and scrapes the material from its inner wall.

[0054] The top and bottom of each annular air pipe 13 are horizontal planes to ensure that they do not hook onto the inner wall of the collection chamber 101 during the lifting and lowering process. The outer wall of the annular air pipe 13 abuts against the inner wall of the collection chamber 101, forming a tight contact relationship. When it is necessary to scrape the inner wall of the collection chamber 101, the synchronous lifting cylinder 9 is controlled to extend downward, driving the liquid collection tank 5 and the connected annular multi-stage dryer to move downward as a whole. During the movement, the outer wall of the annular air pipe 13 always abuts against the inner wall of the collection chamber 101. Using the contact friction between the two, the potassium fluoride crystals attached to the inner wall of the collection chamber 101 are scraped off. The scraped crystals fall downward under the action of gravity and are transported to the downstream process through the conical guide section 2 along with other dried potassium fluoride crystals. After the scraping is completed, the synchronous lifting cylinder 9 can drive the annular air pipe 13 to return to the working position.

[0055] Based on any of the above technical solutions, a further optimization is made: both of the synchronous lifting cylinders 9 adopt multi-stage telescopic hydraulic cylinders with synchronous control, and each of the hydraulic cylinders is controlled by an externally configured hydraulic system.

[0056] The external hydraulic system controls the flow, pressure, and direction of the hydraulic oil to drive the piston rods of the two hydraulic cylinders to perform multi-stage extension and retraction movements.

[0057] Based on any of the above technical solutions, a further optimization is made as follows: an electric heating tube 18 is spirally wound around the periphery of the vertical collection tank 1, and a heat insulation sleeve 19 is provided around the electric heating tube 18.

[0058] First, the electric heating tube 18 is spirally wound around the periphery of the vertical collecting tank 1. After being energized, it generates heat, which is conducted through the tank wall to the internal collecting chamber 101. The heat creates a temperature gradient within the collecting chamber 101, maintaining a high ambient temperature inside the chamber. This provides secondary heating to the initial potassium fluoride product and incompletely vaporized atomized droplets during the descent, promoting further vaporization of residual water. Second, the heat insulation sleeve 19 surrounding the electric heating tube 18 effectively reduces heat loss to the external environment, lowering energy consumption. Simultaneously, it concentrates the heat generated by the electric heating tube 18 onto the vertical collecting tank 1, improving heat utilization efficiency. Finally, through the continuous heating of the electric heating tube 18 and the insulation effect of the heat insulation sleeve 19, combined with the high-temperature blowing of the annular multi-stage dryer, a combined drying environment of external heating and internal high-temperature blowing is formed, enhancing the overall drying effect.

[0059] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model. For those skilled in the art, any alternative improvements or transformations made to the implementation of this utility model fall within the protection scope of this utility model.

[0060] Any aspects of this utility model not described in detail are known to those skilled in the art.

Claims

1. An anhydrous potassium fluoride spray drying device, said device being installed on an anhydrous potassium fluoride production line and used to realize the drying process at the front end of the potassium fluoride solution, characterized in that: The device includes a vertical collection tank with a conical guide section at the bottom. The bottom outlet of the conical guide section is used to connect to a downstream pumping pipeline and transport the dried potassium fluoride primary product to the downstream deep drying process. A positioning plate is fixedly installed on the lower outer wall of the vertical collection tank. Several ground-connecting columns are fixedly installed at intervals on both sides of the bottom of the positioning plate. A solution vaporization unit is installed above the top opening of the vertical collection tank. The solution vaporization unit is used to vaporize the potassium fluoride solution by blowing it with high-temperature hot air and then let it overflow upwards. Both ends of the solution vaporization unit are fixedly supported above the vertical collection tank by vertical support members on both sides.

2. The anhydrous potassium fluoride spray drying apparatus according to claim 1, characterized in that: The solution vaporization unit includes a vertically and fixedly installed collection tank. Several atomizing nozzles are evenly spaced along the circumference of the bottom of the collection tank. Each atomizing nozzle is used to spray atomized potassium fluoride solution downwards at an angle. A flexible inlet tube is connected to the top inlet of the collection tank. A pressure pump is configured upstream of the flexible inlet tube and connected to the potassium fluoride solution supply end. A ring-shaped multi-stage dryer is coaxially installed below the collection tank. The ring-shaped multi-stage dryer is used to blow the potassium fluoride solution sprayed from the atomizing nozzles above it at high temperature. The vaporized water at high temperature moves upwards and overflows along the top of the vertical collection tank. The dried potassium fluoride crystals fall downwards into the collection chamber of the vertical collection tank.

3. The anhydrous potassium fluoride spray drying apparatus according to claim 2, characterized in that: A connecting plate is coaxially fixed on the upper outer wall of the liquid collection tank. Synchronous lifting cylinders are fixedly connected to the upper left and right sides of the connecting plate respectively. The top of the cylinder body of the two synchronous lifting cylinders is fixed on the vertical support. The two synchronous lifting cylinders are in a synchronous lifting state when working. The extent to which the solution vaporization unit enters the collection chamber can be controlled by adjusting the extension and retraction states of the two synchronous lifting cylinders.

4. The anhydrous potassium fluoride spray drying apparatus according to claim 3, characterized in that: The vertical support includes two top fixing seats that are symmetrically fixed on the upper outer side wall of the vertical collection tank. A support column is fixedly installed on the top of each of the two top fixing seats. A horizontal seat is fixed on the top of each support column. The bottom of the inner end of each horizontal seat is fixedly connected to the top of the cylinder body of the synchronous lifting cylinder at the corresponding position.

5. The anhydrous potassium fluoride spray drying apparatus according to claim 4, characterized in that: The annular multi-stage dryer includes several annular air pipes spaced apart from top to bottom. Adjacent annular air pipes are connected by vertical air pipes. The top annular air pipe is fixed to the outer wall of the liquid collection tank through several connecting brackets. Each annular air pipe is coaxially arranged with the liquid collection tank. A high-temperature air intake pipe is fixedly connected to the top left side of the topmost annular air pipe. The high-temperature air intake pipe is connected to an external high-temperature fan. Several high-temperature nozzles are fixedly installed at even intervals along the circumference on the inner side wall of each annular air pipe. Each high-temperature nozzle is used to spray high-temperature airflow and vaporize the atomized potassium fluoride solution at high temperature.

6. The anhydrous potassium fluoride spray drying apparatus according to claim 5, characterized in that: All of the high-temperature nozzles are horizontally positioned.

7. The anhydrous potassium fluoride spray drying apparatus according to claim 6, characterized in that: Each of the atomizing nozzles is tilted downwards.

8. The anhydrous potassium fluoride spray drying apparatus according to claim 7, characterized in that: The top and bottom of each of the annular trachea are horizontal planes, and the outer sidewall of each of the annular trachea abuts against the inner sidewall of the collection chamber. When each of the synchronous lifting cylinders extends downwards, it causes the outer wall of each of the annular air pipes to abut against the inner wall of the collection chamber and scrape the material from its inner wall.

9. The anhydrous potassium fluoride spray drying apparatus according to claim 8, characterized in that: Both of the aforementioned synchronous lifting cylinders are multi-stage telescopic hydraulic cylinders with synchronous control, and each of the aforementioned hydraulic cylinders is controlled by an externally configured hydraulic system.

10. The anhydrous potassium fluoride spray drying apparatus according to claim 9, characterized in that: An electric heating tube is spirally wound around the periphery of the vertical collection tank, and a heat insulation sleeve is provided around the electric heating tube.

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