Flash dryer for battery grade nickel protoxide

Abstract

The invention discloses a flash dryer for battery-grade nickel protoxide, which is ingenious in structural design and good in adaptability in a battery-grade nickel protoxide drying process, and effectively solves the problems that materials are easy to bond and a transmission mechanism is easy to lock and stop through the cooperation of a crushing rod, two shaftless spiral bodies and auxiliary blades. The continuous operation of production is realized, full fluidization and rapid dehydration of materials are realized through the scattering blades, the fluidization blades and the material distributor, and the advantages that the water content of the materials is adjustable and the control precision is higher are realized through the design of the centrifugal separation wheel and the application of variable frequency speed regulation.

Description

Technical Field

[0001] The invention relates to the processing field of raw materials for positive electrodes of sodium ion batteries, and in particular to a flash drying machine for battery-grade nickelous oxide. Background Art

[0002] The current popular applications of new energy vehicle power batteries are mainly ternary batteries and lithium iron phosphate batteries. Compared with the above batteries, sodium-ion batteries have low rare metal content and significant cost advantages; high reserves of major metal elements and strong sustainable development; at the same time, sodium-ion batteries also have obvious advantages in application in low temperature environments and the number of cycles of charge and discharge. In view of the above advantages, the industry chooses sodium-ion batteries as one of the future trends in the development of power batteries. Nickelous oxide is the raw material for the positive electrode of sodium-ion batteries. The traditional dryer produces nickelous oxide, and the product moisture content, tap density, magnetic foreign matter content and other indicators cannot meet the requirements of the downstream battery industry, and the equipment failure rate is high. Therefore, in order to seize market opportunities, the development of drying equipment that meets the production of battery-grade nickelous oxide has broad prospects and is imminent.

[0003] Since nickelous oxide wet material is easy to agglomerate into blocks, if a traditional flash dryer is used, the material will form a bridge and blockage at the bottom of the feeding bin when it is transported to the vulcanizing bin (drying bin) through an auger conveyor. In addition, the nickelous oxide wet material is easy to adhere to the inner wall of the outer shell tube of the auger conveyor, causing the screw to lock and stop. Therefore, it cannot be used directly to transport nickelous oxide wet material. In addition, after the nickelous oxide wet material enters the vulcanizing bin (drying bin) for drying, the separation of the fully dried material and the material that has not been fully dried depends on the centrifugal force provided by the static classifying ring. However, the centrifugal force provided by the device is a fixed value, resulting in the material moisture content being unadjustable, and the moisture content of the output material cannot be controlled more accurately. Summary of the invention

[0004] (1) Technical problem to be solved: When drying wet nickel oxide, conventional flash dryers may cause bridging blockage at the bottom of the feeding bin of the auger conveyor, material adhesion to the inner wall of the outer shell tube of the auger conveyor causing the screw to lock and stop, and the moisture content of the output material cannot be controlled and adjusted. The above factors make it impossible to dry the wet nickel oxide to obtain a qualified product. Therefore, the present invention provides a flash dryer for battery-grade nickel oxide that can solve the above problems.

[0005] (2) The technical solution adopted by the present invention is as follows: a flash dryer for battery-grade nickelous oxide, comprising an equipment support, a vulcanization bin is arranged on the equipment support, a hot air inlet is arranged at the lower part of the side of the vulcanization bin, a feed port is arranged at the upper part of the side of the vulcanization bin, a scrambling shaft is arranged in the vulcanization bin, a fluidizing blade and a scrambling blade are arranged on the scrambling shaft, the lower end of the scrambling shaft extends out of the vulcanization bin and is rotatably connected thereto, the lower end of the scrambling shaft is connected to the output shaft of the fluidizing motor, a conveyor is arranged at the feed port, the conveyor comprises a conveying pipe, a driving device and two screw conveyors, the screw conveyor comprises a shaftless screw body and auxiliary blades evenly distributed on the shaftless screw body, a driving shaft is fixed at the end of the shaftless screw body, the driving shaft passes through the conveying pipe and is rotatably connected thereto, the driving device is connected to the driving shafts of the two shaftless screw bodies to drive the shaftless screw bodies to rotate, the discharge port of the conveying pipe is connected to the feed port of the vulcanization bin, and the top of the conveying pipe is connected There is a feeding bin, which is connected with the inside of the conveying pipe, a crushing shaft is arranged inside the feeding bin, a crushing rod is arranged on the crushing shaft, the upper end of the crushing shaft passes through the feeding bin and is connected with the output shaft of the bin motor, a feeding port is arranged on the upper part of the feeding bin, a sorting bin is arranged above the vulcanization bin, the sorting bin is connected with the vulcanization bin, a collecting bin is arranged above the sorting bin, a discharge port is arranged on the side of the collecting bin, the sorting bin and the collecting bin are connected with each other through the feeding port, a centrifugal sorting wheel is arranged on the top of the sorting bin, the inner diameter of the centrifugal sorting wheel is larger than the feeding port, the centrifugal sorting wheel is coaxially connected with the transmission shaft, the upper end of the transmission shaft is connected with the output shaft of the sorting motor, the centrifugal sorting wheel comprises an upper support ring, a lower support ring and a plurality of blades connected between the upper support ring and the lower support ring, the plurality of blades are distributed along the circumferential direction, the transmission shaft is fixed to the upper support ring, the end of the centrifugal sorting wheel away from the feeding port is closed, and the end of the centrifugal sorting wheel close to the feeding port is open.

[0006] A further technical solution is that a conical distributor is arranged inside the sorting bin below the centrifugal sorting wheel, the diameter of the lower end of the conical distributor is smaller than the diameter of the upper end, and the conical distributor is fixed to the sorting bin.

[0007] A further technical solution is that the auxiliary leaves are in a petal-like structure.

[0008] A further technical solution is that the blades are "S" shaped, the upper end surface of the blades forms an angle of 45° with the radial direction of the centrifugal sorting wheel, and are arranged in an axial array with the axis of the transmission shaft as the center, and the blade spacing is 5mm to 8mm.

[0009] A further technical solution is that the crushing rod is in a mace-shaped structure, and twelve crushing rods are arranged on the crushing shaft. The twelve crushing rods are divided into three layers, with four in each layer.

[0010] A further technical solution is that the spiral directions of the shaftless spiral bodies of the two screw conveyors are opposite, and the center distance between the two shaftless spiral bodies is less than the sum of the spiral radii.

[0011] A further technical solution is that the fluidizing blades include four, which are arranged along the circumferential direction of the scattering axis, and the horizontal plane of the fluidizing blades forms an angle of 45°. The scattering blades include twelve, and the twelve scattering blades are divided into three layers, with four blades in each layer.

[0012] A further technical solution is that the fluidizing blades, scattering blades, centrifugal separation wheels and crushing rods are all made of zirconium oxide full ceramics.

[0013] (3) Due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. The device structure of the present invention is ingeniously designed and has good adaptability in the drying process of battery-grade nickelous oxide.

[0014] 2. The crushing rod can be used to break up the agglomerated materials before entering the conveyor. The shaftless screw body and the petal-shaped auxiliary blades can effectively solve the problem that the materials are easy to stick to the inner wall of the conveying pipe of the conveyor, causing the transmission mechanism to lock and stop, thus achieving continuous production operation.

[0015] 3. The materials are fully fluidized and quickly dehydrated through the scattering blades, fluidizing blades and distributors. The moisture content of the materials can be adjusted through the design of the centrifugal sorting wheel and the application of variable frequency speed regulation, which has the advantage of higher control accuracy.

[0016] 4. The present invention can adjust the moisture content of the material by setting a centrifugal sorting wheel and rationally arranging the position of the centrifugal sorting wheel and controlling the rotation speed of the centrifugal sorting wheel. In addition, by cooperating with an optimized conveyor, it can adapt to the characteristics of wet nickel oxide and meet the requirements of drying battery-grade nickel oxide and controlling the moisture content. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 A schematic structural diagram of the conveyor of the present invention; Figure 3 It is a schematic structural diagram of the shaftless helicoid of the present invention; Figure 4 The structure of the centrifugal separation wheel of the present invention is shown in FIG. Figure 1 ; Figure 5 The structure of the centrifugal separation wheel of the present invention is shown in FIG. Figure 2 ; Figure 6 It is a cross-sectional view of the assembly of the sorting bin, the aggregate bin, and the centrifugal sorting wheel. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0019] like Figure 1-Figure 6 A flash dryer for battery-grade nickelous oxide, comprising an equipment support 2, a vulcanizing bin 6 is arranged on the equipment support 2, a hot air inlet 4 is arranged at the lower part of the side of the vulcanizing bin 6, a feed port 21 is arranged at the upper part of the side of the vulcanizing bin 6, a disintegration shaft 22 is arranged in the vulcanizing bin 6, a fluidizing blade 3 and a disintegration blade 5 are arranged on the disintegration shaft 22, the lower end of the disintegration shaft 22 extends out of the vulcanizing bin 6 and is sealed and rotatably connected thereto, the lower end of the disintegration shaft 22 is connected to the output shaft of the fluidizing motor 1, a conveyor is arranged at the feed port 21, the conveyor comprises a conveying pipe 19, a driving device and two screw conveyors, the screw conveyor comprises a shaftless screw body 20 and attached blades 23 evenly distributed on the shaftless screw body 20, A driving shaft 24 is fixed to the end of the shaftless spiral body 20, and the driving shaft 24 passes through the conveying pipe 19 and is sealed and rotatably connected thereto. The driving device connects the driving shafts 24 of the two shaftless spiral bodies 20 to drive the shaftless spiral bodies 20 to rotate. The discharge port of the conveying pipe 19 is connected to the feed port 21 of the vulcanization bin 6. The top of the conveying pipe 19 is connected to the feeding bin 14, and the feeding bin 14 is communicated with the inside of the conveying pipe 19. A crushing shaft 25 is arranged inside the feeding bin 14, and a crushing rod 16 is arranged on the crushing shaft 25. The upper end of the crushing shaft 25 passes through the feeding bin 14 and is connected to the output shaft of the bin motor 13. The crushing shaft 25 is rotatably connected to the feeding bin 14, and a feeding port 15 is arranged on the upper part of the feeding bin 14. A sorting bin 9 is arranged above the vulcanization bin 6, and the sorting bin 9 is connected with the vulcanization bin 6. A collecting bin 10 is arranged above the sorting bin 9, and a discharge port 11 is arranged on the side of the collecting bin 10. The sorting bin 9 and the collecting bin 10 are connected through a feed port 26. A centrifugal sorting wheel 8 is arranged on the top of the sorting bin 9. The inner diameter of the centrifugal sorting wheel 8 is larger than the feed port 26. The centrifugal sorting wheel 8 is coaxially connected to the transmission shaft 27. The upper end of the transmission shaft 27 is connected to the output shaft of the sorting motor 12. The centrifugal sorting wheel 8 includes an upper support ring 28, a lower support ring 29 and a plurality of blades 30 connected between the upper support ring 28 and the lower support ring 29. The plurality of blades 30 are distributed along the circumferential direction. The transmission shaft 27 is fixed to the upper support ring 28. The end of the centrifugal sorting wheel 8 away from the feed port 26 is closed, and the end of the centrifugal sorting wheel 8 close to the feed port 26 is open. A conical distributor 7 is arranged inside the sorting bin 9 below the centrifugal sorting wheel 8 . The diameter of the lower end of the conical distributor 7 is smaller than the diameter of the upper end. The conical distributor 7 is fixed to the sorting bin 9 .

[0020] The auxiliary blades 23 are in a petal-like structure.

[0021] During use, the nickel oxide wet material after centrifugation enters the feeding bin 14 from the feeding port 15. Since the nickel oxide wet material is easy to agglomerate into blocks, the material will bridge and block at the bottom of the feeding bin 14. Therefore, the block agglomerated material is broken by the breaking rod 16, and the breaking shaft 25 is driven by the silo motor 13 to rotate and drive the breaking rod 16 to run. The broken material enters the conveying pipe 19 of the conveyor and is conveyed by two shaftless screws 20. Since the material is viscous, it is easy to adhere to the inner wall of the spiral conveying pipe 19, causing the spiral to lock and stop. At this time, the petal-shaped auxiliary blades 23 break the bonded material to solve the problem of transmission mechanism locking and realize continuous conveying. The shaftless screw 20 feeds the material into the vulcanizing bin 6. After the material enters the vulcanizing bin, it is scattered by the scattering blades 30, and at the same time, the hot air inlet 4 blows in high-temperature air to fully fluidize the material. The fluidized gas-solid mixed phase rises under the action of high-temperature positive pressure air and is dried in the vulcanizing bin 6 and the sorting bin 9. When the gas-solid mixed phase rises to the distributor, it is evenly distributed. After the distribution is completed, the mixture enters the flow field of the centrifugal sorting wheel 8. At this time, the centrifugal sorting wheel 8 rotates at a high speed. Here, the nickelous oxide is subjected to the centrifugal force of the centrifugal sorting wheel 8, the induced draft negative pressure force of the discharge port, and the high-temperature positive pressure air force blown in by the hot air inlet 4. The specific gravity of the fully dried material is low, and the centrifugal force of the centrifugal sorting wheel 8 is ≤ the sum of the induced draft negative pressure force of the discharge port and the high-temperature positive pressure air force blown in by the hot air inlet 4. Therefore, the fully dried material enters the inside of the sorting wheel through the gap between the blades 30 of the centrifugal sorting wheel 8, and then enters the collecting bin 10 through the outlet on the upper end face of the centrifugal sorting wheel 8. Then it enters the bag dust collector from the discharge port for collection. The material that is not fully dried has a high moisture content and a large specific gravity, and the centrifugal force of the centrifugal sorting wheel 8 is ≥ the sum of the induced draft negative pressure force of the discharge port and the high-temperature positive pressure air force blown in by the hot air inlet 4. Therefore, the insufficiently dried materials fall into the vulcanizing bin 6 and the sorting bin 9 to continue drying. The materials with high moisture content and large specific gravity or the block materials that are not fully scattered at the bottom of the vulcanizing bin 6 are further stirred, crushed and fluidized by the fluidizing blade 3, and then the drying and sorting processes are continued.

[0022] If the process requires that the moisture content of the material be further reduced, the frequency of the sorting motor 12 can be increased, thereby increasing the rotation speed of the centrifugal sorting wheel 8. At this time, the centrifugal force on the material increases year-on-year. For the material that is fully dried before adjustment, the force it is subjected to changes from "the centrifugal force of the centrifugal sorting wheel 8 ≤ the sum of the induced draft negative pressure force at the discharge port and the high-temperature positive pressure air force blown in by the hot air inlet 4" to "the centrifugal force of the centrifugal sorting wheel 8 ≥ the sum of the induced draft negative pressure force at the discharge port and the high-temperature positive pressure air force blown in by the hot air inlet 4". As a result, the material falls into the vulcanizing bin 6 and the sorting bin 9 to continue drying, further reducing the moisture content. And vice versa. The moisture content of the material can be adjusted at any time.

[0023] The blades 30 are in an "S" shape, with the upper end surface of the blades 30 forming an angle of 45° with the radial direction of the centrifugal separation wheel 8, and are arranged in an axial array with the axis of the transmission shaft 27 as the center, and the spacing between the blades 30 is 5mm to 8mm.

[0024] The crushing rod 16 is in a mace-shaped structure, and twelve crushing rods 16 are arranged on the crushing shaft 25. The twelve crushing rods 16 are divided into three layers, with four in each layer, so as to break the material agglomerates.

[0025] The spiral directions of the shaftless screw bodies 20 of the two screw conveyors are opposite, and the center distance between the two shaftless screw bodies 20 is less than the sum of the spiral radii. The shaftless screw bodies 20 are further prevented from locking, ensuring that the materials are smoothly transported to the vulcanizing bin 6. The driving device includes a screw motor 18 and a gear 17. The housing of the screw motor 18 is fixed to the equipment bracket 2. The output shaft of the screw motor 18 is coaxially fixed to the drive shaft 24 corresponding to one of the shaftless screw bodies 20. The drive shafts 24 corresponding to the two shaftless screw bodies 20 are both provided with gears 17, and the transmission is through the gear 17.

[0026] The fluidizing blades 3 include four, which are arranged in the circumferential direction of the scattering axis 22, and the horizontal plane of the fluidizing blades forms an angle of 45 degrees. The scattering blades 30 include twelve, and the twelve scattering blades 30 are divided into three layers, with four blades in each layer.

[0027] The fluidizing blade 3, the scattering blade 30, the centrifugal separation wheel 8, and the crushing rod 16 are all made of zirconium oxide full ceramic.

[0028] The materials of the vulcanizing bin 6, the conical distributor 7, the sorting bin 9, the collecting bin 10 and the feeding bin 14 are all 304 lined alumina ceramics.

[0029] The shaftless spiral body 20 and the attached blades 23 are made of 304 lined PTFE.

[0030] The design principle of the present invention is: First, after the material is fluidized, the gas-solid mixture enters the flow field of the centrifugal sorting wheel 88. At this time, the centrifugal sorting wheel 8 rotates at a high speed. Here, nickelous oxide is subjected to the centrifugal force of the centrifugal sorting wheel 8, the induced draft negative pressure force of the discharge port, and the high-temperature positive pressure air force blown in by the hot air inlet 4. The specific gravity of the fully dried material is low, and the centrifugal force of the centrifugal sorting wheel 8 is ≤ the sum of the induced draft negative pressure force of the discharge port 11 and the high-temperature positive pressure air force blown in by the hot air inlet 4. Therefore, the fully dried material enters the inside of the sorting wheel through the gap between the blades 30 of the centrifugal sorting wheel 8, and then enters the collection bin 10 through the outlet on the upper end face of the sorting wheel. The insufficiently dried material has a high moisture content and a large specific gravity, and the centrifugal force of the centrifugal sorting wheel 8 is ≥ the sum of the induced draft negative pressure force of the discharge port and the high-temperature positive pressure air force blown in by the hot air inlet 4. Therefore, the insufficiently dried material falls into the vulcanization bin 6 and the sorting bin 9 to continue drying.

[0031] Secondly, if the process requires that the moisture content of the material be further reduced, the frequency of the sorting motor 12 can be increased, thereby increasing the rotation speed of the centrifugal sorting wheel 8. At this time, the centrifugal force on the material increases year-on-year. For the material that is fully dried before adjustment, the force it is subjected to changes from "the centrifugal force of the centrifugal sorting wheel 8 ≤ the sum of the induced draft negative pressure force at the discharge port and the high-temperature positive pressure air force blown in by the hot air inlet 4" to "the centrifugal force of the centrifugal sorting wheel 8 ≥ the sum of the induced draft negative pressure force at the discharge port and the high-temperature positive pressure air force blown in by the hot air inlet 4". Therefore, the material falls into the vulcanizing bin 6 and the sorting bin 9 to continue drying, thereby further reducing the moisture content. And vice versa.

[0032] Third, the centrifugal sorting wheel 8 is a rotating component. If the top of the sorting bin 9 is open, the feed port 26 is opened on the bottom wall of the aggregate bin 10. In order to prevent it from rubbing against the lower section of the bottom wall of the aggregate bin 10, the distance between the upper end face of the centrifugal sorting wheel 8 and the lower end face of the aggregate bin 10 is designed to be ≤2mm during assembly. However, this design will cause insufficiently dried materials to enter the aggregate bin 10 through the assembly gap between the two, resulting in uncontrollable moisture content of the material. Therefore, the blades 30 of the centrifugal sorting wheel 8 are designed to be S-shaped. The purpose is that when the material is at the upper end of the S-shaped blades 30, the direction of the centrifugal force it is subjected to is at a certain angle to the horizontal plane and is downward, so the direction of the force on the material can be decomposed into toward the shell of the sorting bin 9 and vertically downward. The moisture content of the material can be precisely controlled.

[0033] Fourth, the blades 30 are in an "S" shape, with the upper end surface of the blades 30 forming an angle of 45° with the radial direction of the centrifugal sorting wheel 8, and an axial array is formed with the axis of the transmission shaft 27 as the center, and the spacing between the blades 30 is 5mm to 8mm. The design purpose is that when the material rises into the flow field of the centrifugal sorting wheel 8 in the state of gas-solid mixture, the inclined blades 30 block the path for the unsorted material to directly enter the inside of the sorting wheel. At the same time, if the spacing between the blades 30 is too small, it will cause material blockage, and if it is too large, it will cause the unsorted material to directly enter the inside of the centrifugal sorting wheel 8. The above measures are used to achieve precise control of the moisture content of the material.

[0034] The above are only preferred embodiments of the present invention.

Claims

1. A flash dryer for battery-grade nickelous oxide, comprising an equipment support (2), a sulfurizing chamber (6) being arranged on the equipment support (2), a hot air inlet (4) being arranged at the lower part of the side of the sulfurizing chamber (6), and a feed port (21) being arranged at the upper part of the side of the sulfurizing chamber (6), characterized in that: The vulcanizing bin (6) is provided with a scattering shaft (22), and a fluidizing blade (3) and a scattering blade (5) are provided on the scattering shaft (22). The lower end of the scattering shaft (22) extends out of the vulcanizing bin (6) and is rotatably connected thereto. The lower end of the scattering shaft (22) is connected to the output shaft of the fluidizing motor (1). A conveyor is provided at the feed port (21), the conveyor comprising a conveying pipe (19), a driving device and two screw conveyors, the screw conveyors comprising a shaftless screw (20) and attached blades (23) evenly distributed on the shaftless screw (20), a driving shaft (24) being fixed to the end of the shaftless screw (20), the driving shaft (24) passing through the conveying pipe (19) and being rotatably connected thereto, the driving device being connected to the driving shafts (24) of the two shaftless screws (20) for driving the shaftless screws (20) to rotate, The discharge port of the conveying pipe (19) is connected to the feed port (21) of the vulcanizing bin (6); the top of the conveying pipe (19) is connected to the feeding bin (14); the feeding bin (14) is connected to the inside of the conveying pipe (19); a crushing shaft (25) is provided inside the feeding bin (14); a crushing rod (16) is provided on the crushing shaft (25); the upper end of the crushing shaft (25) passes through the feeding bin (14) and is connected to the output shaft of the bin motor (13); a feeding port (15) is provided at the top of the feeding bin (14); A sorting bin (9) is arranged above the vulcanizing bin (6), the sorting bin (9) being connected to the vulcanizing bin (6), a collecting bin (10) is arranged above the sorting bin (9), the sorting bin (9) and the collecting bin (10) being connected via a material passing port (26), a discharge port (11) being arranged on the side of the collecting bin (10), a centrifugal sorting wheel (8) being arranged at the top of the sorting bin (9), the inner diameter of the centrifugal sorting wheel (8) being larger than the material passing port (26), the centrifugal sorting wheel (8) being coaxially connected to a transmission shaft (27), the upper end of the transmission shaft (27) being connected to the output shaft of a sorting motor (12), The centrifugal separation wheel (8) comprises an upper support ring (28), a lower support ring (29), and a plurality of blades (30) connected between the upper support ring (28) and the lower support ring (29); the plurality of blades (30) are distributed in a circumferential direction; the transmission shaft (27) is fixed to the upper support ring (28); an end of the centrifugal separation wheel (8) away from the material passing port (26) is closed, and an end of the centrifugal separation wheel (8) close to the material passing port (26) is open.

2. A flash dryer for battery-grade nickelous oxide according to claim 1, characterized in that: A conical distributor (7) is arranged inside the sorting bin (9) below the centrifugal sorting wheel (8); the diameter of the lower end of the conical distributor (7) is smaller than the diameter of the upper end; the conical distributor (7) is fixed to the sorting bin (9).

3. A flash dryer for battery-grade nickelous oxide according to claim 1, characterized in that: The auxiliary leaves (23) are in a petal-like structure.

4. A flash dryer for battery-grade nickelous oxide according to claim 1, characterized in that: The blades (30) are in an "S" shape, the upper end surfaces of the blades (30) form an angle of 45° with the radial direction of the centrifugal separation wheel (8), and are arranged in an axial array with the axis of the transmission shaft (27) as the center, and the spacing between the blades (30) is 5 mm to 8 mm.

5. A flash dryer for battery-grade nickelous oxide according to claim 1, characterized in that: The crushing rod (16) has a mace-shaped structure. A total of twelve crushing rods (16) are arranged on the crushing shaft (25). The twelve crushing rods (16) are divided into three layers, with four crushing rods in each layer.

6. A flash dryer for battery-grade nickelous oxide according to claim 1, characterized in that: The spiral directions of the shaftless spiral bodies (20) of the two spiral conveyors are opposite, and the center distance between the two shaftless spiral bodies (20) is less than the sum of the spiral radii.

7. A flash dryer for battery-grade nickelous oxide according to claim 1, characterized in that: The fluidizing blades (3) include four, which are arranged in the circumferential direction of the scattering axis (22), and the fluidizing blades (3) form an angle of 45° with the horizontal plane. The scattering blades (30) include twelve, and the twelve scattering blades (30) are divided into three layers, with four blades in each layer.

8. A flash dryer for battery-grade nickelous oxide according to claim 1, characterized in that: The fluidizing blade (3), the scattering blade (30), the centrifugal separation wheel (8), and the crushing rod (16) are all made of zirconium oxide full ceramic.

9. A flash dryer for battery-grade nickelous oxide according to claim 1, characterized in that: The materials of the sulfiding bin (6), the conical distributor (7), the sorting bin (9), the collecting bin (10), and the feeding bin (14) are all (304) lined alumina ceramic.

10. A flash dryer for battery-grade nickelous oxide according to claim 1, characterized in that: The shaftless spiral (20) and the attached blades (23) are made of (304) PTFE-lined material.

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