A drying apparatus and method for the production of potassium fluoborate

Abstract

The application belongs to the technical field of solid drying equipment, and particularly relates to a drying equipment and method for potassium fluoborate production, which comprises a drying cylinder, a heat conduction assembly and a stirring assembly, the heat conduction assembly and the stirring assembly are arranged on the inner side of the drying cylinder, the top end of the drying cylinder is provided with a feeding pipe, and the bottom end of the drying cylinder is provided with a discharging pipe. Compared with the existing vertically arranged cylindrical air duct, the heat conduction assembly greatly increases the contact area between the heat conduction assembly and the powder, and the heat conduction ring and the heat conduction disc can effectively increase the contact time between the heat conduction ring and the heat conduction disc and the powder, form a snakelike material passing channel, and make the powder reciprocally roll and slide along the radius of the heat conduction ring and the heat conduction disc during the downward flow of the powder, so that the travel path of the powder on the heat conduction assembly is optimized and prolonged, and the powder and the heat conduction assembly are fully contacted.

Description

Technical Field

[0001] This invention relates to the field of solid drying equipment technology, and in particular to a drying equipment and method for the production of potassium fluoroborate. Background Technology

[0002] Potassium fluoroborate is a white powder or gel-like crystal, slightly soluble in water and hot ethanol, but insoluble in cold ethanol. It is used as a flux in welding, and also in the metallurgical industry and in the production of boron trifluoride and other fluoride salt raw materials. When preparing potassium fluoroborate, the finished product prepared by salting out needs to be dried before subsequent packaging, which requires the use of drying equipment.

[0003] Chinese invention document CN209877582U discloses a drying device for potassium acetate production. Heated air is introduced to heat the drying cylinder, causing the potassium acetate inside to evaporate. A first stirring rod and a second stirring rod can stir the granular powder. A filter screen is provided on the top, which can quickly blow out the heated and evaporated water vapor through the air duct, thereby achieving uniform heating and preventing agglomeration.

[0004] However, during the drying process, a large amount of powder material accumulates in the annular space between the drying drum and the air duct. Only the material near the air duct can be directly heated. Due to uneven heating of the material in the air duct, and the horizontally arranged smooth cylindrical stirring rods, when rotating, cannot efficiently move the material closer to or away from the air duct. This uneven heating can easily lead to overheating and caking of the inner powder, while insufficient heating of the outer powder results in a significant increase in drying time. To address these issues, we propose a drying equipment and method for the production of potassium fluoroborate. Summary of the Invention

[0005] The purpose of this invention is to solve the problems existing in the prior art by providing a drying equipment and method for the production of potassium fluoroborate.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A drying device for the production of potassium fluoroborate includes a drying cylinder, a heat-conducting component, and a stirring component. The heat-conducting component and the stirring component are located inside the drying cylinder. A feed pipe is provided at the top of the drying cylinder, and a discharge pipe is provided at the bottom of the drying cylinder. The heat-conducting component includes at least one heat-conducting plate and a heat-conducting ring. The heat-conducting plate and the heat-conducting ring provide heat to the internal space of the drying cylinder. The heat-conducting plate and the heat-conducting ring are arranged horizontally. A material passage ring gap is provided between the heat-conducting plate and the vertical inner wall of the drying cylinder. A guide ring is provided between the heat-conducting ring and the vertical inner wall of the drying cylinder. A material passage port is opened in the middle of the heat-conducting ring. The drying cylinder, the heat-conducting plate, and the heat-conducting ring form a serpentine material passage channel. The stirring component includes a vertical rotating shaft. A relay component is installed on the outside of the rotating shaft between the heat-conducting plate and the heat-conducting ring. Multiple horizontally arranged rotating rods are installed on the relay component. Scrapers are installed on the lower side of the rotating rods. The scrapers are positioned vertically and horizontally. The scraper is twisted at a fixed angle. The downward-sloping end face of the scraper is the pressing surface, and the upward-sloping end face of the scraper is the pushing surface. The pushing surface of the scraper above the heat-conducting plate is arranged away from the direction of the rotating shaft, and the pushing surface of the scraper above the heat-conducting ring is arranged towards the direction of the rotating shaft. An exhaust assembly is installed on the drying cylinder. The exhaust assembly includes an air inlet pipe and an exhaust pipe. The rotating shaft and the rotating rod are hollow. The lower part of the rotating shaft is rotatably connected to the air inlet pipe. The rotating rod has interconnected insertion holes. The rotating shaft has a through hole at the position of the relay. The relay has a built-in communication port. End rods are installed at both ends of the rotating rod. The middle of the end rod has a communication hole that communicates with the communication port. The air inlet pipe supplies air to the inside of the drying cylinder through the series channel formed by the rotating shaft, through hole, communication port, communication hole, rotating rod and insertion hole. The exhaust pipe is installed through the vertical side wall of the drying cylinder.

[0008] In the preparation of potassium fluoroborate, the finished product prepared by salting out has a high moisture content and needs to be dried before further processing. To dry the moist potassium fluoroborate, the powder enters the drying cylinder through the feed pipe, and the potassium fluoroborate powder falls directly onto the uppermost heat-conducting plate. The heat-conducting plate and heat-conducting ring have the required temperature for drying, providing heat for heating and drying the potassium fluoroborate powder. When the rotating shaft and rod rotate, the inclined scrapers, according to their own angle arrangement, push, tumble, and crush the potassium fluoroborate powder through the upper pushing surface and the lower pressing surface, ensuring that the potassium fluoroborate powder passes through a serpentine process. While moving through the material channel, the potassium fluoroborate that has agglomerated due to drying is crushed and pulverized a second time. The serpentine material passage can fully extend the movement path of the powder and increase the sufficient drying contact time. The external air pump will blow high-pressure air from the air inlet pipe into the hollow rotating shaft, and flow into each rotating rod position through the layered through holes and connecting ports. Finally, it will be sprayed into each cavity between the heat-conducting plate and the heat-conducting ring through the insertion hole, and the volatile moisture will be carried out from the exhaust pipe of the drying cylinder. The potassium fluoroborate powder will be discharged from the bottom discharge pipe of the drying cylinder, completing the drying and dehydration to obtain dry potassium fluoroborate powder.

[0009] Preferably, the top sidewall of the heat-conducting disk is configured as an upwardly convex end face that is high in the middle and low around the edges, and the top sidewall of the heat-conducting ring is configured as an inwardly recessed end face that is low in the middle and high around the edges, and the top sidewall of the guide ring is high around the edges and low in the middle.

[0010] The top sidewall of the heat-conducting plate is designed with a convex end face that is high in the middle and low around the edges, so that the potassium fluoroborate powder on the convex end face slides to the edges under the action of gravity. The concave end face that is low in the middle and high around the edges is designed to allow the potassium fluoroborate powder on the concave end face to slide to the middle under the action of gravity. The auxiliary scraper discharges the material and prevents the powder from staying in the drying cylinder for a long time.

[0011] Preferably, the heat-conducting plate and heat-conducting ring have a built-in water passage cavity, and the inlet and outlet of the water passage cavity extend to the outside of the drying cylinder and are connected to a water passage pipe;

[0012] The water passage cavity makes the entire heat conduction plate and heat conduction ring hollow. There are two water passage pipes, one on the left and one on the right. One pipe fills the water passage cavity with hot water, and the other pipe discharges the water after heat exchange, providing continuous heat.

[0013] Preferably, the bottom sidewall of the scraper is in sliding contact with the top sidewall of the heat-conducting plate and the heat-conducting ring. The top sidewall of the heat-conducting plate and the heat-conducting ring is provided with an arc groove. Two adjacent scrapers are not parallel to each other. Two scrapers separated by one scraper are parallel to each other. Scrapers at the same distance from the rotating shaft are parallel to each other.

[0014] The bottom end of the scraper overlaps the top of the heat-conducting plate and the heat-conducting ring, which can push and crush the powder. The arc groove increases the roughness of the top sidewall of the heat-conducting plate and the heat-conducting ring, which can improve the efficiency of crushing, dispersing and passing the powder when crushing agglomerated potassium fluoroborate powder. The two adjacent scrapers are not parallel to each other, and the two scrapers separated by one scraper are parallel to each other. On the same rotating rod, one scraper crushes while the other pushes. The scrapers at the same distance from the rotating shaft are parallel to each other, which can ensure that the powder at the same distance from the rotating shaft will be pushed away from or towards the rotating shaft immediately after being crushed by one scraper, and continuously pushed to avoid stagnation. After each push and flip, it will be crushed and pulverized, which improves the efficiency of pushing and crushing.

[0015] Preferably, a centrifugal disc is installed at the lower part of the rotating shaft at the discharge pipe position, and the relay component includes a fixed ring and two semi-ring seats. A plug-in ring is provided on the outer wall of the semi-ring seat. The plug-in ring is assembled and connected to the end of the rotating rod, and the fixed ring is assembled and connected to the two semi-ring seats respectively.

[0016] The centrifugal discs are fixed on the lower outer wall of the rotating shaft. As the shaft rotates, the dried potassium fluoroborate that has fallen into the discharge pipe can be pushed out of the discharge pipe for active discharge to prevent easy blockage. The two separate semi-ring seats are combined into a whole. The semi-ring seat is divided into a semi-ring structure, which allows the rotating rod and relay to be disassembled separately without disassembling the rotating shaft and heat conduction components, which facilitates later maintenance.

[0017] Preferably, a support plate is installed at the top of the semi-ring seat, a socket is provided on the fixing ring to be inserted into the support plate, a liner is installed at the top of the fixing ring, and the liner and the support plate are connected by bolts.

[0018] The support plate is welded and fixedly installed on the top of the semi-ring seat, so that the semi-ring seat can be inserted into the socket from bottom to top and locked by bolts and liner plates to complete the locking and fixing. At this time, the semi-ring seat can rotate synchronously with the fixed ring. The locking method of upper and lower insertion combined with horizontal bolt fixing is tight and easy to disassemble.

[0019] Preferably, a plug block is inserted into the socket, a retaining plate is installed at one end of the plug block on the outside of the socket, a magnetic block is hinged to the end of the retaining plate, a sliding sleeve is rotatably installed on the outer wall of the middle part of the retaining plate, a vertical rod is installed on the scraper in the middle of the upper push surface, a rectangular through-hole is opened in the middle of the vertical rod, a thread is installed in the rectangular through-hole, and the thread is screwed to the vertical inner wall of the sliding sleeve by a thread.

[0020] The insert block is horizontally inserted into the socket, and with the two clamping plates pressing against the outer wall of the rotating rod from both sides, and the magnetic block adsorbs the metal rotating rod, the scraper below can be quickly clamped and fixed. When disassembling, simply pull horizontally along the axis of the rotating rod, and the insert block will detach from the socket. The convenient disassembly and assembly operation can shorten the installation time when arranging the angle and position of the scraper one by one. After loosening the thread, the vertical rod can slide up and down in the sliding sleeve, so the height of the scraper can be adjusted without changing the position of the clamping plate. This allows for flexible adaptation to the top side wall of the heat conduction plate and heat conduction ring with gradually changing heights, reducing the difficulty of installation.

[0021] Preferably, the exhaust pipe is provided with multiple air inlets, the number of air inlets being the same as the number of heat-conducting plates and heat-conducting rings, and the air inlets being located between the heat-conducting plates and heat-conducting rings;

[0022] The air inlets are arranged horizontally and integrally formed on the exhaust pipe. The number of air inlets is the same as the number of heat-conducting plates and rings. This allows the air blown between each pair of heat-conducting plates and rings to be directly discharged in the same layer. Air carrying water vapor will not shuttle up and down between the heat-conducting plates and rings, reducing the coexistence time between water vapor and powder, improving the timeliness of dehumidification, and preventing water vapor from contacting low-temperature powder and causing secondary condensation.

[0023] Preferably, a heat exchange tube is installed at the top of the exhaust pipe, the heat exchange tube is arranged to pass through the middle of the feed pipe, and equidistant fins are installed on the outside of the heat exchange tube inside the feed pipe.

[0024] The heat exchange tube is fixed to the top opening of the exhaust pipe by flange and bolts. There are openings in the middle of the vertical side walls of the feed pipe. The heat exchange tube passes through the feed pipe through the openings. The fins are welded between the outer wall of the heat exchange tube and the inner wall of the feed pipe. When the powder and high-temperature exhaust gas pass through the feed pipe and the heat exchange tube, non-contact heat exchange will occur on the fins. The heat of the high-temperature exhaust gas is transferred to the powder to preheat the powder and increase the temperature of the powder entering the drying cylinder, thus shortening the drying time.

[0025] Preferably, a method for drying and dehydrating potassium fluoroborate using a drying device includes the following steps:

[0026] S1. Moist potassium fluoroborate powder enters the drying cylinder from the feed pipe and is supported by the top side wall of the heat-conducting plate and heat-conducting ring. The heat-conducting plate and heat-conducting ring provide heat to the internal space of the drying cylinder, providing heat for heating and drying the potassium fluoroborate powder.

[0027] S2. The rotating shaft is driven to rotate, which drives multiple rotating rods installed on the relay to rotate synchronously, and then pushes the potassium fluoroborate powder at the top of the heat-conducting plate and heat-conducting ring to move through the scraper.

[0028] S3. When the potassium fluoroborate powder rotates, the inclined scraper, with its upward pushing surface facing the powder, pushes the powder upward and tumbles it while its downward pressing surface faces the powder and squeezes it downward. Together with the heat-conducting plate and the top side wall of the heat-conducting ring, the scraper crushes the powder that has clumped together. The number of scrapers in these two states is the same, and they are distributed at different installation positions on the rotating rod to ensure that all the powder is pushed upward and pressed downward at least once in one rotation.

[0029] S4. The scraper above the heat-conducting plate will gradually push the potassium fluoroborate powder towards the material passing ring gap, causing it to fall onto the guide ring below. The guide ring causes the powder to slide to the outer edge of the heat-conducting ring. The scraper above the heat-conducting plate will gradually push the powder towards the material passing port, causing it to fall onto the heat-conducting plate below. In this way, the material is pushed back and forth on the heat-conducting plate and heat-conducting ring during the falling process, which fully extends the movement path of the powder.

[0030] S5. During drying, the air inlet pipe provides airflow to the hollow rotating shaft from the bottom. The air flows from the through hole to the connecting port at the relay position, and then flows into the hollow rotating rod through the connecting hole at the end of the rotating rod. Finally, it is sprayed into the cavity between the heat-conducting plate and the heat-conducting ring through the insertion hole on the side wall of the rotating rod to air dry the powder. The evaporated moisture is carried out from the exhaust pipe and discharged from the drying cylinder, while the powder is discharged from the discharge pipe at the bottom, completing the drying process.

[0031] Compared with existing technologies, the advantages of this drying equipment and method for the production of potassium fluoroborate are as follows:

[0032] 1. By setting up a heat-conducting component, which includes stacked heat-conducting rings and heat-conducting discs, compared to the existing vertically arranged cylindrical air duct, the contact area can be significantly increased when in contact with moist potassium fluoroborate. The outer walls of the top of the heat-conducting rings and heat-conducting discs can support the potassium fluoroborate powder. Compared to the powder on the outside of the vertical air duct, which can only be pushed and slid across its surface, this effectively increases the contact time between the powder and the material. Furthermore, the top side walls of the heat-conducting rings and heat-conducting discs are set with inclined end faces, allowing the powder to slide downwards under gravity without affecting the automatic material feeding from top to bottom. The heat-conducting rings are high around the edges and low in the middle, while the heat-conducting discs are high in the middle and low around the edges, forming a serpentine feeding channel. During the downward flow of the powder, the powder can roll and slide back and forth along the radius of the heat-conducting rings and heat-conducting discs. By optimizing and extending the travel path of the powder on the heat-conducting component, full contact between the powder and the heat-conducting component is ensured.

[0033] 2. By setting up the stirring component, which includes a rotating shaft, a rotating rod, and scrapers, compared with the existing horizontally arranged smooth cylindrical stirring rod, the potassium fluoroborate powder can be horizontally pushed by the scrapers on the rotating rod when the shaft rotates, allowing the powder to move laterally on the heat-conducting component. By controlling the rotation speed of the stirring component, the residence time of the powder in the heat-conducting component can be controlled, effectively controlling the drying residence time. Furthermore, the scrapers can be staggered in terms of inclination angle and extension direction, and while horizontally pushing, they can also push and lift the powder upwards and crush it downwards. Pushing and lifting can cause the powder to roll and change position on the heat-conducting component, improving the uniformity of contact between the powder surface and the upper surface of the heat-conducting component. The crushing downwards is achieved by the scrapers working with the upper surface of the heat-conducting component to crush and disperse the clumps of potassium fluoroborate, ensuring that the potassium fluoroborate is loose.

[0034] 3. The exhaust system, primarily composed of the shaft and rods of the mixing component, utilizes the hollow design of these components to simultaneously blow air into the drying drum while performing its mixing function. This eliminates the need for a single-function blower structure within the drying drum, improving space utilization. The shaft runs vertically through the heat-conducting components, and the layered rods evenly distribute airflow within the interlayered space of the heat-conducting components. Combined with vertically multi-inlet exhaust pipes, compared to the existing top-mounted unified exhaust method, this system promptly removes moisture evaporating from each layer of powder within the drying drum, preventing interference with the drying of other layers and further improving drying efficiency. Furthermore, the exhaust gas, at the inlet, contacts and exchanges heat with the newly entering powder through fins, preheating the powder and fully utilizing the heat from the exhaust gas, thus shortening the drying time required for the powder within the drying drum. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the left side of the present invention;

[0036] Figure 2 This is a cross-sectional view of the present invention;

[0037] Figure 3 This is a schematic diagram of the structure between the heat-conducting component and the stirring component of the present invention;

[0038] Figure 4 This is a cross-sectional view of the heat-conducting component and the stirring component of the present invention;

[0039] Figure 5 This is a schematic diagram showing the disassembled stirring assembly of the present invention;

[0040] Figure 6 This is a rear view diagram of the present invention;

[0041] Figure 7 This is a schematic diagram showing the location of the exhaust assembly of the present invention;

[0042] Figure 8 This is a cross-sectional view of the rotating shaft, relay, and rotating rod of the present invention.

[0043] In the diagram: 1. Drying cylinder; 11. Feed pipe; 12. Discharge pipe; 2. Heat-conducting assembly; 21. Heat-conducting plate; 211. Material passage ring gap; 212. Upper convex end face; 213. Water passage cavity; 22. Water passage pipe; 23. Heat-conducting ring; 231. Material passage port; 232. Guide ring; 233. Concave end face; 24. Arc groove; 3. Stirring assembly; 31. Rotating shaft; 32. Centrifugal disc; 33. Rotating rod; 331. Clamping plate; 332. Insertion hole; 333. Sliding sleeve; 334 335. Magnetic block; 336. Insert block; 337. Connecting hole; 34. End rod; 35. Scraper; 36. Vertical rod; 37. Lower pressing surface; 38. Upper pushing surface; 39. Intermediate component; 30. Semi-ring seat; 31. Insert ring; 32. Support plate; 33. Fixing ring; 34. Liner plate; 35. Insertion port; 40. Exhaust assembly; 41. Inlet pipe; 42. Exhaust pipe; 43. Heat exchange tube; 44. Fin plate; 45. Through hole; 46. Connecting port. Detailed Implementation

[0044] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0045] Example 1

[0046] Reference Figure 1-3A drying device for the production of potassium fluoroborate includes a drying cylinder 1, a heat-conducting component 2, and a stirring component 3. The heat-conducting component 2 and the stirring component 3 are located inside the drying cylinder 1. A feed pipe 11 is provided at the top of the drying cylinder 1, and a discharge pipe 12 is provided at the bottom of the drying cylinder 1. The heat-conducting component 2 includes at least one heat-conducting plate 21 and a heat-conducting ring 23. The heat-conducting plate 21 and the heat-conducting ring 23 provide heat to the internal space of the drying cylinder 1. The heat-conducting plate 21 and the heat-conducting ring 23 are arranged horizontally. A material passage ring gap is provided between the heat-conducting plate 21 and the vertical inner wall of the drying cylinder 1. 211. A guide ring 232 is provided between the heat-conducting ring 23 and the vertical inner wall of the drying cylinder 1. A material passage 231 is opened in the middle of the heat-conducting ring 23. The drying cylinder 1, the heat-conducting plate 21, and the heat-conducting ring 23 form a serpentine material passage channel. The stirring assembly 3 includes a vertical rotating shaft 31. A relay component 35 is installed on the outside of the rotating shaft 31 between the heat-conducting plate 21 and the heat-conducting ring 23. Multiple horizontally arranged rotating rods 33 are installed on the relay component 35. A scraper 34 is installed on the lower side of the rotating rod 33. The scraper 34 has a fixed angle of torsion in the vertical and horizontal directions. The downward-sloping end face of scraper 34 is the downward-pressing surface 342, and the upward-sloping end face of scraper 34 is the upward-pushing surface 343. The upward-pushing surface 343 of scraper 34 located above heat-conducting plate 21 is arranged away from the direction of rotating shaft 31, while the upward-pushing surface 343 of scraper 34 located above heat-conducting ring 23 is arranged towards the direction of rotating shaft 31. An exhaust assembly 4 is installed on drying cylinder 1. The exhaust assembly 4 includes an air inlet pipe 41 and an exhaust pipe 42. The rotating shaft 31 and rotating rod 33 are configured as hollow structures. The lower part of the rotating shaft 31 is rotatably connected to the air inlet pipe 41. The rod 33 has interconnected insertion holes 332. The rotating shaft 31 has a through hole 45 at the position of the relay 35. The relay 35 has a connecting port 451 inside. The two ends of the rotating rod 33 are respectively installed with end rods 337. The middle of the end rod 337 is provided with a connecting hole 336 that communicates with the connecting port 451. The air inlet pipe 41 supplies air to the inside of the drying cylinder 1 through the series channel formed by the rotating shaft 31, the through hole 45, the connecting port 451, the connecting hole 336, the rotating rod 33 and the insertion hole 332. The exhaust pipe 42 is installed through the vertical side wall of the drying cylinder 1.

[0047] In the preparation of potassium fluoroborate, the potassium fluoroborate solid produced by salting out has a relatively high overall moisture content. The damp potassium fluoroborate powder needs to be dried before proceeding with subsequent production processes. During powder drying, the damp potassium fluoroborate powder is first fed into the drying cylinder 1 through the feed pipe 11. The powder then falls directly onto the uppermost heat-conducting plate 21. The heat-conducting plate 21 and heat-conducting ring 23 have the required drying temperature, providing heat for the potassium fluoroborate powder to dry. When the rotating shaft 31 and rotating rod 33 rotate, the inclined scraper 34, according to its own angle arrangement, pushes, flips, and presses the potassium fluoroborate powder through the upper pushing surface 343 and the lower pressing surface 342. The powder is crushed and crushed to prevent clumping while moving through the serpentine material passage. The serpentine material passage can extend the powder's movement path and increase the sufficient drying contact time. An external air pump blows high-pressure air from the air inlet pipe 41 into the hollow rotating shaft 31, and flows into each rotating rod 33 position through the layered through holes 45 and connecting ports 451. Finally, it is sprayed into each cavity between the heat-conducting plate 21 and the heat-conducting ring 23 through the insertion hole 332, and carries the evaporated moisture out of the drying cylinder 1 from the exhaust pipe 42. The powder is discharged from the drying cylinder 1 from the discharge pipe 12 at the bottom, completing the drying and dehydration to obtain dry potassium fluoroborate powder.

[0048] Example 2

[0049] Reference Figure 1-5 A drying device for the production of potassium fluoroborate, wherein the top sidewall of the heat-conducting plate 21 is configured as an upwardly convex end face 212 with a high center and low periphery, the top sidewall of the heat-conducting ring 23 is configured as an inwardly recessed end face 233 with a low center and high periphery, and the top sidewall of the guide ring 232 is high periphery and low center.

[0050] Specifically, the heat-conducting plate 21 and the heat-conducting ring 23 have a built-in water passage cavity 213, and the inlet and outlet of the water passage cavity 213 extend to the outside of the drying cylinder 1 and are connected to the water passage pipe 22.

[0051] The top sidewall of the heat-conducting plate 21 is designed as an upwardly convex end face 212 with a high center and low periphery, so that the powder on the upwardly convex end face 212 slides to the periphery under the action of gravity. The inwardly recessed end face 233 with a low center and high periphery is designed to make the powder on the inwardly recessed end face 233 slide to the center under the action of gravity. The auxiliary scraper 34 discharges the powder to prevent the powder from staying in the drying cylinder 1 for a long time. The water passage cavity 213 makes the entire heat-conducting plate 21 and heat-conducting ring 23 hollow. There are two water passage pipes 22, one of which fills the water passage cavity 213 with hot water, and the other discharges the water after heat exchange, providing continuous heat.

[0052] Example 3

[0053] Reference Figure 1-6A drying device for the production of potassium fluoroborate, wherein the bottom sidewall of scraper 34 slides in contact with the top sidewall of heat-conducting plate 21 and heat-conducting ring 23, and the top sidewall of heat-conducting plate 21 and heat-conducting ring 23 is provided with arc groove 24, two adjacent scrapers 34 are not parallel to each other, two scrapers 34 separated by one scraper 34 are parallel to each other, and scrapers 34 at the same distance from the rotating shaft 31 are parallel to each other.

[0054] Specifically, a centrifugal disc 32 is installed at the lower part of the rotating shaft 31 at the position of the discharge pipe 12. The relay component 35 includes a fixed ring 354 and two semi-ring seats 351. A plug-in ring 352 is provided on the outer wall of the semi-ring seat 351. The plug-in ring 352 is assembled and connected to the end of the rotating rod 33. The fixed ring 354 is assembled and connected to the two semi-ring seats 351 respectively.

[0055] It is worth noting that a support plate 353 is installed at the top of the semi-ring seat 351, and a socket 356 is provided on the fixing ring 354 to be inserted into the support plate 353. A liner 355 is installed at the top of the fixing ring 354, and the liner 355 and the support plate 353 are connected by bolts.

[0056] It is worth noting that a plug block 335 is inserted into the socket 332. A retaining plate 331 is installed at one end of the plug block 335 located outside the socket 332. A magnetic block 334 is hinged to the end of the retaining plate 331. A sliding sleeve 333 is rotatably installed on the outer wall of the middle part of the retaining plate 331. A vertical rod 341 is installed on the scraper 34 located in the middle of the upper push surface 343. A rectangular through-hole is opened in the middle of the vertical rod 341. A thread is installed in the rectangular through-hole. The thread is screwed to the vertical inner wall of the sliding sleeve 333 by a thread.

[0057] The bottom end of the scraper 34 overlaps the top of the heat-conducting plate 21 and the heat-conducting ring 23, allowing for the pushing and crushing of powder. The arc groove 24 increases the roughness of the top sidewalls of the heat-conducting plate 21 and the heat-conducting ring 23, improving the efficiency of crushing and dispersing powder when crushing agglomerated powder. Adjacent scrapers 34 are not parallel to each other, while scrapers 34 separated by one space are parallel to each other. On the same rotating rod 33, one scraper 34 crushes while the other pushes. Scrapers 34 at the same distance from the rotating shaft 31 are parallel to each other, ensuring that powder at the same distance from the rotating shaft 31 is crushed. After being crushed by a scraper 34, the material is immediately pushed away from or towards the rotating shaft 31 for continuous pushing to avoid stagnation. Each push and tumbling is followed by a crushing and pulverizing process, improving pushing and pulverizing efficiency. The centrifugal blades 32 are fixed to the lower outer wall of the rotating shaft 31. As the rotating shaft 31 rotates, they push the material falling into the discharge pipe 12 out of the discharge pipe 12 for active discharge to prevent blockage. The two separate semi-ring seats 351 are assembled into a single unit. The semi-ring structure of the semi-ring seats 351 can be used without disassembling the rotating shaft 31 and the heat-conducting component 2. The rotating rod 33 and the relay component 35 are disassembled separately for easy maintenance. The support plate 353 is welded and fixedly installed on the top of the semi-ring seat 351, allowing the semi-ring seat 351 to be inserted into the socket 356 from bottom to top. It is then locked in place by bolts and the liner plate 355. At this point, the semi-ring seat 351 can rotate synchronously with the fixed ring 354. The combination of vertical insertion and horizontal bolt fixing provides a tight fit and easy disassembly. The insert block 335 is horizontally inserted into the socket 332, and with the help of two clamping plates 331, it makes contact with the outer wall of the rotating rod 33 from both sides. The magnetic block 334 is used to hold the rod in place. The metal rotating rod 33 can be used to quickly snap and fix the scraper 34 below. When disassembling, simply pull horizontally along the axis of the rotating rod 33, and the insert 335 will disengage from the insertion hole 332. The convenient disassembly and assembly operation can shorten the installation time when arranging the angle and position of the scraper 34 one by one. After loosening the thread, the vertical rod 341 can slide up and down in the sliding sleeve 333, so the height of the scraper 34 can be adjusted without changing the position of the clamping plate 331. This allows for flexible adaptation to the top sidewall of the heat conduction plate 21 and heat conduction ring 23, which have gradually changing heights, thus reducing the difficulty of installation.

[0058] Example 4

[0059] Reference Figure 5-8 A drying device for the production of potassium fluoroborate, wherein the exhaust pipe 42 is provided with multiple air inlets, the number of which is the same as the number of heat-conducting plates 21 and heat-conducting rings 23, and the air inlets are located between the heat-conducting plates 21 and heat-conducting rings 23.

[0060] Specifically, a heat exchange tube 43 is installed at the top of the exhaust pipe 42. The heat exchange tube 43 runs through the middle of the feed pipe 11. Equally spaced fins 44 are installed on the outside of the heat exchange tube 43 inside the feed pipe 11.

[0061] The air inlets are arranged horizontally and integrally formed on the exhaust pipe 42. The number of air inlets is the same as the number of heat-conducting plates 21 and heat-conducting rings 23, allowing the air blown between each pair of heat-conducting plates 21 and heat-conducting rings 23 to be directly discharged at the same layer. Air carrying water vapor will not shuttle up and down between the heat-conducting plates 21 and heat-conducting rings 23, reducing the coexistence time between water vapor and powder, improving the timeliness of dehumidification, and preventing secondary condensation of water vapor upon contact with low-temperature powder. The heat exchange tube 43 passes through a... The flange and bolts are fixed to the top opening of the exhaust pipe 42. The feed pipe 11 has an opening in the middle of the front and rear vertical side walls. The heat exchange pipe 43 passes through the feed pipe 11 through the opening. The fin 44 is welded between the outer wall of the heat exchange pipe 43 and the inner wall of the feed pipe 11. When the powder and high-temperature exhaust gas pass through the feed pipe 11 and the heat exchange pipe 43, non-contact heat exchange will be carried out on the fin 44 to transfer the heat of the high-temperature exhaust gas to the powder, preheat the powder, increase the temperature of the powder entering the drying cylinder 1, and shorten the drying time.

[0062] Example 5

[0063] According to the aforementioned drying equipment and assembly for the production of potassium fluoroborate, the potassium fluoroborate drying and dehydration operation includes the following steps:

[0064] S1. Moist potassium fluoroborate powder enters the drying cylinder 1 from the feed pipe 11 and is supported by the top side wall of the heat-conducting plate 21 and the heat-conducting ring 23. The heat-conducting plate 21 and the heat-conducting ring 23 provide heat to the internal space of the drying cylinder 1 and provide heat for heating and drying the powder.

[0065] S2, the rotating shaft 31 is driven to rotate, which drives the multiple rotating rods 33 installed on the relay 35 to rotate synchronously, and then pushes the powder at the top of the heat-conducting plate 21 and the heat-conducting ring 23 to move through the scraper 34;

[0066] S3. When the powder rotates, the inclined scraper 34, in the rotating state, has its upper pushing surface 343 facing the powder scraper 34, which pushes the powder upward and rolls it, while its lower pressing surface 342 facing the powder scraper 34, which squeezes the powder downward. Together with the top sidewall of the heat-conducting plate 21 and the heat-conducting ring 23, the scraper 34 in both states is the same in number and is distributed at different installation positions of the rotating rod 33, ensuring that all the powder is pushed upward and pressed downward at least once in one rotation.

[0067] S4. The scraper 34 above the heat-conducting plate 21 will gradually push the powder towards the material passage gap 211, so that it falls onto the guide ring 232 below. The guide ring 232 makes the powder slide to the outer edge of the heat-conducting ring 23. The scraper 34 above the heat-conducting plate 21 will gradually push the powder towards the material passage 231, so that it falls onto the heat-conducting plate 21 below. In this way, the material is pushed back and forth on the heat-conducting plate 21 and the heat-conducting ring 23 during the falling process, which fully extends the movement path of the powder.

[0068] S5. During drying, the air inlet pipe 41 provides flowing air to the hollow rotating shaft 31 from the lower end. The air flows from the through hole 45 to the connecting port 451 at the position of the relay 35, and flows into the hollow rotating rod 33 through the connecting hole 336 at the end of the rotating rod 33. Finally, it is sprayed into the cavity between the heat-conducting plate 21 and the heat-conducting ring 23 through the insertion hole 332 on the side wall of the rotating rod 33 to air dry the powder. The evaporated moisture is carried out from the position of the exhaust pipe 42 and discharged from the drying cylinder 1, while the powder is discharged from the discharge pipe 12 at the bottom, completing the drying process.

[0069] S6. The high-temperature gas is guided by the heat exchange tube 43 into the feed tube 11. When the powder and the high-temperature exhaust gas meet through the feed tube 11 and the heat exchange tube 43, they will exchange heat in a non-direct contact manner on the fin plate 44. The heat of the high-temperature exhaust gas is transferred to the powder to preheat the powder and increase the temperature of the powder entering the drying cylinder 1, thus shortening the drying time.

[0070] The automated equipment involved in the embodiments uses pre-made products provided by the manufacturer. Its supporting control system, electromagnetic switches and circuits can also be provided by the manufacturer. In addition, the power supply module, circuits and electronic components and control module involved in this invention are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated. The content protected by this invention does not involve improvements to the internal structure and method.

[0071] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A drying device for the production of potassium fluoborate, comprising a drying cylinder (1), a heat conduction assembly (2) and a stirring assembly (3), the heat conduction assembly (2) and the stirring assembly (3) being arranged inside the drying cylinder (1), the top end of the drying cylinder (1) being provided with a feeding pipe (11), and the bottom end of the drying cylinder (1) being provided with a discharging pipe (12), characterized in that the heat conduction assembly (2) comprises at least one heat conduction disc (21) and one heat conduction ring (23), the heat conduction disc (21) and the heat conduction ring (23) providing heat for the internal space of the drying cylinder (1), the heat conduction disc (21) and the heat conduction ring (23) being arranged horizontally, a material passing annular gap (211) being arranged between the heat conduction disc (21) and the vertical inner wall of the drying cylinder (1), a guide ring (232) being arranged between the heat conduction ring (23) and the vertical inner wall of the drying cylinder (1), a material passing opening (231) being formed in the middle of the heat conduction ring (23), and the drying cylinder (1), the heat conduction disc (21) and the heat conduction ring (23) forming a serpentine material passing channel; the stirring assembly (3) comprising a vertical rotating shaft (31), a relay (35) being arranged outside the rotating shaft (31) between the heat conduction disc (21) and the heat conduction ring (23), a plurality of rotating rods (33) being arranged horizontally on the relay (35), a scraper (34) being arranged at the lower side of the rotating rod (33), the scraper (34) being twisted at a fixed angle in the vertical direction and the horizontal direction, the lower side end surface of the scraper (34) being a downward pressing surface (342), the upper side end surface of the scraper (34) being an upward pushing surface (343), the upward pushing surface (343) of the scraper (34) above the heat conduction disc (21) being arranged in the direction opposite to the rotating shaft (31), and the upward pushing surface (343) of the scraper (34) above the heat conduction ring (23) being arranged in the direction of the rotating shaft (31); an air exhaust assembly (4) being arranged on the drying cylinder (1), the air exhaust assembly (4) comprising an air inlet pipe (41) and an air exhaust pipe (42), the rotating shaft (31) and the rotating rod (33) being arranged in a hollow structure, the lower part of the rotating shaft (31) being rotatably and conductively connected with the air inlet pipe (41), a plurality of insertion holes (332) being formed in the rotating rod (33) and being in communication with each other, a through hole (45) being formed in the rotating shaft (31) at the position of the relay (35), a communication port (451) being arranged in the relay (35), end rods (337) being arranged at the two ends of the rotating rod (33), a communication hole (336) being arranged in the middle of the end rod (337) and being in communication with the communication port (451), the air inlet pipe (41) supplying air to the inside of the drying cylinder (1) through a serial connection channel formed by the rotating shaft (31), the through hole (45), the communication port (451), the communication hole (336), the rotating rod (33) and the insertion hole (332), and the air exhaust pipe (42) being arranged in the vertical side wall of the drying cylinder (1). ​ The bottom end side wall of the scraper (34) is in sliding contact with the top end side wall of the heat-conducting disc (21) and the heat-conducting ring (23), the top end side wall of the heat-conducting disc (21) and the heat-conducting ring (23) is provided with an arc groove (24), the two adjacent scrapers (34) on the same rotating rod (33) are not parallel to each other, the two scrapers (34) on the same rotating rod (33) are parallel to each other and are separated by one scraper (34) interval, and the scrapers (34) at the same distance from the rotating shaft (31) are parallel to each other. The lower part of the rotating shaft (31) is provided with a centrifugal piece (32) at the position of the discharge pipe (12), the relay piece (35) comprises a fixed ring (354) and two half ring seats (351), the outer wall of the half ring seat (351) is provided with a plug-in ring (352), the plug-in ring (352) is assembled and connected with the end of the rotating rod (33), and the fixed ring (354) is assembled and connected with the two half ring seats (351) respectively.

2. The drying apparatus for producing potassium fluoborate according to claim 1, characterized by The top end side wall of the heat-conducting disc (21) is provided with an upper convex end face (212) which is high in the middle and low at the periphery, the top end side wall of the heat-conducting ring (23) is provided with an inwardly recessed end face (233) which is low in the middle and high at the periphery, and the top end side wall of the heat-conducting ring (232) is high in the middle and low at the periphery.

3. The drying apparatus for producing potassium fluoborate according to claim 2, characterized by The heat-conducting disc (21) and the heat-conducting ring (23) are internally provided with a water passing cavity (213), and the water inlet and outlet of the water passing cavity (213) extends to the outside of the drying cylinder (1) and is connected with a water passing pipe (22).

4. The drying apparatus for producing potassium fluoborate according to claim 1, characterized by The top end of the half ring seat (351) is provided with a support plate (353), the fixed ring (354) is provided with a socket (356) which is matched with the support plate (353) for plug-in connection, the top end of the fixed ring (354) is provided with a lining plate (355), and the lining plate (355) and the support plate (353) are connected by bolts.

5. The drying apparatus for producing potassium fluoborate according to claim 4, characterized by The plug-in hole (332) is provided with a plug-in block (335), one end of the plug-in block (335) located outside the plug-in hole (332) is provided with a clamping plate (331), the end of the clamping plate (331) is hingedly provided with a magnetic block (334), the middle part of the clamping plate (331) is rotatably provided with a sliding sleeve (333), the scraper (34) is provided with a vertical rod (341) in the middle of the pushing surface (343), the middle part of the vertical rod (341) is provided with a rectangular through hole, the rectangular through hole is provided with a wire, and the wire is threadedly rotatably connected with the vertical inner wall of the sliding sleeve (333).

6. The drying apparatus for producing potassium fluoborate according to claim 1, characterized by The air exhaust pipe (42) is provided with a plurality of air inlets, the number of the air inlets is consistent with the number of the heat-conducting disc (21) and the heat-conducting ring (23), and the air inlets are arranged between the heat-conducting disc (21) and the heat-conducting ring (23).

7. The drying apparatus for producing potassium fluoborate according to claim 6, characterized by The top end of the air exhaust pipe (42) is provided with a heat exchange pipe (43), the heat exchange pipe (43) penetrates through the middle part of the feeding pipe (11) from front to back, and the heat exchange pipe (43) is provided with equally spaced fin plates (44) inside the feeding pipe (11).

8. A method of drying and dehydrating by using the drying apparatus for producing potassium fluoborate according to claim 1, characterized by, The method comprises the following steps: S1, after the preparation of moist potassium fluoride powder by salting out, the high humidity powder enters the drying cylinder (1) from the feeding pipe (11), is carried by the top side wall of the heat conduction disc (21) and the heat conduction ring (23), and the heat conduction disc (21) and the heat conduction ring (23) provide heat for the internal space of the drying cylinder (1) and provide heat for the heating and drying of the powder; S2, the rotating shaft (31) is driven to rotate, driving the multiple rotating rods (33) installed on the relay (35) to rotate synchronously, and then pushing the powder at the top end of the heat conduction disc (21) and the heat conduction ring (23) through the scraper (34); S3, when the powder rotates, the scraper (34) is arranged obliquely, the pushing surface (343) of the scraper (34) facing the powder will push and tumble the powder upward through the pushing surface (343), and the pressing surface (342) of the scraper (34) facing the powder will press and crush the powder downward through the pressing surface (342), which will crush the agglomerated powder at the top end of the heat conduction disc (21) and the heat conduction ring (23), the number of the scraper (34) in the two states is the same, and they are dispersedly arranged at different installation positions of the rotating rod (33), so that all the powder will be pushed and pressed at least once when the rotating rod (33) rotates one round; S4, the scraper (34) above the heat conduction disc (21) will gradually push the powder to the material passing annular gap (211), so that it falls to the guide ring (232) below, and the guide ring (232) makes the powder slide to the outer edge position of the heat conduction ring (23), the scraper (34) above the heat conduction disc (21) will gradually push the powder to the material passing port (231), so that it falls to the heat conduction disc (21) below, and then the material is pushed back and forth on the heat conduction disc (21) and the heat conduction ring (23) during the falling process, so as to sufficiently prolong the movement path of the powder; S5, in the drying process, the air inlet pipe (41) provides flowing air from the lower end of the hollow rotating shaft (31), the air flows from the through hole (45) to the communication port (451) at the position of the relay (35), and then flows into the hollow rotating rod (33) through the communication hole (336) at the end of the rotating rod (33), and finally is sprayed into the cavity between the heat conduction disc (21) and the heat conduction ring (23) through the insertion hole (332) in the side wall of the rotating rod (33), so as to dry the powder, and the volatilized moisture is carried out from the air outlet pipe (42) position of the drying cylinder (1), while the powder is discharged from the bottom outlet pipe (12), and the drying process is completed.

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