A material conveying device and fluidized bed drying system

Abstract

This utility model discloses a conveying device and a fluidized bed drying system. The conveying device is configured to connect a high-temperature fluidized bed and a low-temperature fluidized bed. The conveying device includes a feeding pipe and a striking assembly. The feeding pipe is located between the high-temperature and low-temperature fluidized beds and is connected to the discharge end of the high-temperature fluidized bed and the feed end of the low-temperature fluidized bed, respectively. The striking assembly includes a support, a striking element, and a driving element. The support is connected to the outer wall of the feeding pipe. The striking element is positioned relative to the feeding pipe and can slide relative to the support. The driving element is connected to the feeding pipe and the support and is used to drive the striking element to slide back and forth relative to the support, thereby striking the feeding pipe. This utility model can effectively solve the problem of small particles of material adhering to the inner wall of the conveying pipe due to improper material properties and flow control, resulting in blockage when the material is transferred from the hot bed to the cold bed.

Description

Technical Field

[0001] This utility model relates to the field of fluidized bed technology, specifically to a material conveying device and a fluidized bed drying system. Background Technology

[0002] To address the issue of material blockage during the transfer of materials from the hot bed to the cold bed for cooling after drying in a fluidized bed, the discharge end of the hot bed can be set at a higher height than the feed end of the cold bed.

[0003] For example, Chinese utility model patent with publication number CN214095181U, entitled "A Device for Cleaning Material Accumulation in Fluidized Bed Air Chambers," includes two fluidized beds. An air distribution plate is provided in the middle of each fluidized bed, dividing it into an upper chamber and an air chamber. The two fluidized beds are a high-temperature fluidized bed and a low-temperature fluidized bed. A transmission pipe is provided between the high-temperature and low-temperature fluidized beds. Several baffles are fixedly connected to the air chamber of each fluidized bed, and through holes are provided at the bottom of each baffle. A belt conveyor is provided at the bottom of the low-temperature fluidized bed. This device addresses the problems of low raw material processing efficiency, the need for manual cleaning of the fluidized bed air chambers, low production efficiency, and high labor intensity in existing technologies.

[0004] Typically, the design of baffles and through-holes and the installation of transmission pipes have greatly reduced the risk of blockage. However, in actual operation, due to the properties of the material and improper flow control, small particles of material may adhere to the inner wall of the transmission pipe, which may still cause blockage. Utility Model Content

[0005] The purpose of this invention is to overcome the above-mentioned technical deficiencies and propose a material conveying device and a fluidized bed drying system to solve the technical problem in the prior art where small particles of material adhere to the inner wall of the conveying pipe due to improper material properties and flow control, resulting in blockage when the material is transferred from the hot bed to the cold bed.

[0006] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution: In a first aspect, this utility model provides a material conveying device configured to connect a high-temperature fluidized bed and a low-temperature fluidized bed, comprising: A feed pipe is disposed between the high-temperature fluidized bed and the low-temperature fluidized bed, and is connected to the discharge end of the high-temperature fluidized bed and the feed end of the low-temperature fluidized bed, respectively; and The striking assembly includes a support, a striking element, and a driving element. The support is connected to the outer wall of the feed tube. The striking element is disposed relative to the feed tube and can slide relative to the support. The driving element is connected to the feed tube and the support and is used to drive the striking element to slide back and forth relative to the support and strike the feed tube.

[0007] In some embodiments, the diameter of the feed pipe gradually decreases along the direction close to the feed end of the low-temperature fluidized bed, and its axis is inclined downward relative to the low-temperature fluidized bed.

[0008] In some embodiments, the support has a first segment and a second segment. One end of the first segment is connected to the outer wall of the feeding tube. The second segment is parallel to and spaced apart from the outer wall of the feeding tube and connected to the first segment. The first segment has a through groove relative to the outer wall of the feeding tube. The striking element includes a striking block and a sliding rod. The striking block is disposed relative to the outer wall of the feeding tube. One end of the sliding rod is connected to the striking block, and the other end is slidably inserted into the through groove.

[0009] In some embodiments, at least one spherical groove is provided on each of the two inner sidewalls opposite to the through groove, and the striking member further includes at least two rolling parts, which are rotatably housed in the spherical grooves and abut against the sliding rod.

[0010] In some embodiments, the driving member includes a driving part and an elastic part. The driving part has a fixed end and a movable end. The fixed end of the driving part is connected to the first segment of the support, and the movable end is connected to the sliding rod, for driving the sliding rod and the striking block to slide closer to the feeding tube. One end of the elastic part is connected to the sliding rod, and the other end is connected to the first segment of the support, for driving the sliding rod to slide relative to the first segment of the support and then automatically reset.

[0011] In some embodiments, the driving unit includes a rack, a driving gear, and a driving motor. The rack is arranged along the guide of the sliding rod and connected to the sliding rod. The driving gear is in the shape of a half-spherical gear and meshes with the rack. The fixed end of the driving motor is connected to the first segment of the support, and the output shaft is coaxially arranged with the driving gear and connected to the driving gear, for driving the sliding rod to slide relative to the first segment of the support.

[0012] In some embodiments, the cross-sectional area of ​​the striking block gradually decreases along the direction close to the feed tube and forms an arc-shaped striking portion. The striking element also includes an elastic sleeve, which is sleeved on the striking portion.

[0013] In some embodiments, the feeding device further includes a protective cover covering the second section of the support, the striking block, the sliding rod, the rack, the drive gear and the drive motor, and connected to the first section of the support.

[0014] Secondly, this utility model also provides a fluidized bed drying system, including a high-temperature fluidized bed, a low-temperature fluidized bed, and a feeding device as described above. The feeding pipe is disposed between the high-temperature fluidized bed and the low-temperature fluidized bed, and is connected to the discharge end of the high-temperature fluidized bed and the feed end of the low-temperature fluidized bed, respectively.

[0015] In some embodiments, the fluidized bed drying system further includes a star-shaped discharge valve, which is disposed on the high-temperature fluidized bed and used to discharge clumps of material inside the high-temperature fluidized bed.

[0016] Compared with the prior art, the beneficial effects of the conveying device and fluidized bed drying system provided by this utility model include: the feeding pipe is set between the high-temperature fluidized bed and the low-temperature fluidized bed, and is connected to the discharge end of the high-temperature fluidized bed and the feed end of the low-temperature fluidized bed respectively, so as to realize the transfer of the material after drying in the high-temperature fluidized bed to the low-temperature fluidized bed for cooling; the striking element is connected to the feeding pipe through the support, and can slide back and forth relative to the support under the drive of the driving element, and strike the feeding pipe. Compared with the prior art, by setting the striking element relative to the feeding pipe, the striking element can continuously strike the feeding pipe under the drive of the driving element, so as to induce the vibration of the feeding pipe wall, so that the small particles adhering to the inner wall of the feeding pipe due to static electricity, etc., are separated from the feeding pipe, thereby avoiding the blockage of the material in the feeding pipe. It can solve the technical problem that the small particles of material adhere to the inner wall of the conveying pipe due to improper material properties and flow control, which leads to the blockage when the material is transferred from the hot bed to the cold bed. Attached Figure Description

[0017] Figure 1 This is a cross-sectional view of a material conveying device provided in an embodiment of this utility model; Figure 2 It is along Figure 1 Enlarged view of point A in the middle; Figure 3 This is a cross-sectional view of the second segment connected to the sliding rod and the rolling part rack according to an embodiment of the present invention; Figure 4 This is a schematic diagram of a material conveying device and a fluidized bed drying system provided in an embodiment of the present invention.

[0018] Explanation of reference numerals in the attached figures: High-temperature fluidized bed 100; low-temperature fluidized bed 200; feed pipe 300; impact assembly 400; support 410; first section 411; second section 412; impact component 420; impact block 421; sliding rod 422; rolling part 423; elastic sleeve 424; driving component 430; driving part 431; rack 4311; driving gear 4312; driving motor 4313; elastic part 432; protective cover 500; star-shaped discharge valve 600. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0020] To address the technical problem of material blockage caused by the adhesion of fine particles to the inner wall of the conveying pipe due to improper material properties and flow control, which leads to blockage during material transfer from the hot bed to the cold bed, this invention provides a conveying device and a fluidized bed drying system. By installing a striking element 420 relative to the feeding pipe 300, the striking element 420 continuously strikes the feeding pipe 300 under the drive of the driving element 430. This induces vibration of the pipe wall, causing fine particles adhering to the inner wall of the feeding pipe 300 due to static electricity or other factors to separate from the feeding pipe 300, thereby preventing blockage within the feeding pipe 300.

[0021] Please see Figures 1 to 4 , Figure 1 , Figure 4 This is a schematic diagram of the conveying device and fluidized bed drying system in one embodiment of the present invention. The device is configured to connect a high-temperature fluidized bed 100 and a low-temperature fluidized bed 200. The conveying device includes a feeding pipe 300 and a striking assembly 400. The feeding pipe 300 is disposed between the high-temperature fluidized bed 100 and the low-temperature fluidized bed 200, and is connected to the discharge end of the high-temperature fluidized bed 100 and the feed end of the low-temperature fluidized bed 200, respectively. The striking assembly 400 includes a support 410, a striking element 420, and a driving element 430. The support 410 is connected to the outer wall of the feeding pipe 300. The striking element 420 is disposed relative to the feeding pipe 300 and can slide relative to the support 410. The driving element 430 is connected to the feeding pipe 300 and the support 410, and is used to drive the striking element 420 to slide reciprocally relative to the support 410 and strike the feeding pipe 300.

[0022] In this device, compared with the prior art, by setting a striking element 420 relative to the feeding pipe 300, the striking element 420 can continuously strike the feeding pipe 300 under the drive of the driving element 430, which is used to induce vibration of the pipe wall of the feeding pipe 300. This causes the tiny particles that adhere to the inner wall of the feeding pipe 300 due to static electricity to separate from the feeding pipe 300, thereby avoiding the blockage of materials in the feeding pipe 300. This can solve the technical problem that the tiny particles of material adhere to the inner wall of the conveying pipe due to improper material properties and flow control, which leads to blockage when the material is transferred from the hot bed to the cold bed.

[0023] Furthermore, in order to solve the problem of material blockage during the transfer of material from the hot bed to the cold bed for cooling after drying in the fluidized bed, the discharge end of the hot bed can be set at a higher height than the feed end of the cold bed. For example, Chinese utility model patent with publication number CN214095181U, entitled "A Device for Cleaning Material Accumulation in Fluidized Bed Air Chamber", describes a method where material dried in a high-temperature fluidized bed 100 is transported through a feeding pipe 300 to a low-temperature fluidized bed 200 for low-temperature cooling. Finally, the cooled material is transported and collected by a belt conveyor. This is a conventional setup known to those skilled in the art and will not be described in detail here.

[0024] In this embodiment, as Figure 1 , Figure 4 As shown, the diameter of the feed pipe 300 gradually decreases along the direction close to the feed end of the low-temperature fluidized bed 200, and its axis is inclined downward relative to the low-temperature fluidized bed 200.

[0025] By setting the axis of the feed pipe 300 to be inclined downward relative to the low-temperature fluidized bed 200, and the diameter of the feed pipe 300 gradually decreasing along the direction close to the feed end of the low-temperature fluidized bed 200, it is beneficial for the material to be transported from the feed pipe 300 to the low-temperature fluidized bed 200.

[0026] Furthermore, the feed tube 300 here is made of stainless steel, which is common and readily available in the market, and its inner wall is smooth, which can reduce material adhesion or blockage.

[0027] In this embodiment, as Figures 1 to 3 As shown, the support 410 has a first segment 411 and a second segment 412. One end of the first segment 411 is connected to the outer wall of the feeding pipe 300. The second segment 412 is parallel to and spaced apart from the outer wall of the feeding pipe 300 and is connected to the first segment 411. The first segment 411 has a through groove relative to the outer wall of the feeding pipe 300. The striking member 420 includes a striking block 421 and a sliding rod 422. The striking block 421 is disposed relative to the outer wall of the feeding pipe 300. One end of the sliding rod 422 is connected to the striking block 421 and the other end is slidably inserted into the through groove.

[0028] The first segment 411 and the second segment 412 are used to support and connect the sliding rod 422 and the feeding pipe 300, wherein the through groove is used to realize the sliding connection between the sliding rod 422 and the feeding pipe 300.

[0029] Furthermore, the first segment 411 of the support 410 can be fixedly connected to the outer wall of the feed pipe 300 by welding or fastener connection, which will not be described in detail here.

[0030] In one embodiment, please refer to Figure 3 The two inner sidewalls opposite to the through groove are respectively provided with at least one spherical groove. The striking member 420 also includes at least two rolling parts 423, which are rotatably built into the spherical groove and abut against the sliding rod 422.

[0031] In order to reduce the friction between the sliding rod 422 and the second segment 412 of the support 410, the rolling part 423 is rotatably built into the spherical groove and abuts against the outer wall of the sliding rod 422.

[0032] Furthermore, two spherical grooves are provided on the inner walls of both sides of the through groove, which can form a stable support and connection for the sliding rod 422. The rolling part 423 is a steel ball or iron ball that is common in the market and easy to purchase. It is a conventional setting known to those skilled in the art and will not be described in detail here.

[0033] In one embodiment, please refer to Figure 2 The driving component 430 includes a driving part 431 and an elastic part 432. The driving part 431 has a fixed end and a movable end. The fixed end of the driving part 431 is connected to the first segment 411 of the support 410, and the movable end is connected to the sliding rod 422. It is used to drive the sliding rod 422 and the striking block 421 to slide close to the feeding pipe 300. One end of the elastic part 432 is connected to the sliding rod 422, and the other end is connected to the first segment 411 of the support 410. It is used to drive the sliding rod 422 to slide relative to the first segment 411 of the support 410 and then automatically reset.

[0034] The driving unit 431 drives the striking block 421 to slide close to the feeding tube 300. At the same time, the elastic restoring force generated by the elastic part 432 drives the striking block 421 to slide away from the feeding tube 300 and then reset. By repeating this operation, the striking block 421 can reciprocate to strike the wall of the feeding tube 300.

[0035] Furthermore, the elastic part 432 here is a spring that is common and readily available in the market, or it can be an elastic block or an elastic sheet. This is a conventional setting known to those skilled in the art, and will not be described in detail here.

[0036] In one embodiment, please refer to Figure 2The drive unit 431 includes a rack 4311, a drive gear 4312, and a drive motor 4313. The rack 4311 is arranged along the guide of the sliding rod 422 and connected to the sliding rod 422. The drive gear 4312 is in the shape of a half-spur gear and meshes with the rack 4311. The fixed end of the drive motor 4313 is connected to the first segment 411 of the support 410, and the output shaft is coaxially arranged with the drive gear 4312 and connected to the drive gear 4312, for driving the sliding rod 422 to slide relative to the first segment 411 of the support 410.

[0037] By using the rotation of the drive motor 4313 to drive the drive gear 4312 to mesh intermittently with the rack 4311, the sliding rod 422 can reciprocate and slide close to the feed pipe 300.

[0038] Furthermore, the rack 4311, drive gear 4312, and drive motor 4313 are all common and readily available equipment on the market, and are conventional configurations known to those skilled in the art, so they will not be described in detail here.

[0039] Furthermore, by setting the number of teeth on the drive gear 4312, which is shaped like a half-spherical gear, the drive gear 4312 can be intermittently meshed with the rack 4311. This is a conventional setting known to those skilled in the art and will not be described in detail here.

[0040] In one embodiment, please refer to Figure 2 The cross-sectional area of ​​the striking block 421 gradually decreases along the direction close to the feed pipe 300 and forms an arc-shaped striking part. The striking element 420 also includes an elastic sleeve 424, which is sleeved on the striking part.

[0041] By setting the striking part in an arc shape, the damage to the wall of the feeding pipe 300 by the striking block 421 can be reduced, the service life of the device can be extended, and the stability of the device operation can be improved.

[0042] Furthermore, the elastic sleeve 424 here is a common and readily available plastic on the market, which is a conventional setting known to those skilled in the art, and will not be described in detail here.

[0043] In one embodiment, please refer to Figure 2 The material conveying device also includes a protective cover 500, which covers the second section 412 of the support 410, the striking block 421, the sliding rod 422, the rack 4311, the drive gear 4312 and the drive motor 4313, and is connected to the first section 411 of the support 410.

[0044] The protective cover 500 is fitted onto the second section 412 of the support 410, the striking block 421, the sliding rod 422, the rack 4311, the drive gear 4312 and the drive motor 4313, which can form protection for the device and thus improve the stability of the device operation.

[0045] Furthermore, the elastic sleeve 424 here is a common and readily available stainless steel shell on the market, which is a conventional setting known to those skilled in the art, and will not be described in detail here.

[0046] Furthermore, in some embodiments, such as Figure 2 As shown, one end of the elastic part 432 is connected to the sliding rod 422, and the other end is connected to the inner wall of the protective cover 500.

[0047] This utility model also provides a fluidized bed drying system, characterized in that it includes a high-temperature fluidized bed 100, a low-temperature fluidized bed 200 and a conveying device, wherein a feeding pipe 300 is disposed between the high-temperature fluidized bed 100 and the low-temperature fluidized bed 200 and is respectively connected to the discharge end of the high-temperature fluidized bed 100 and the feed end of the low-temperature fluidized bed 200.

[0048] The hot and cold beds are set up independently, with the hot bed elevated to create a height difference with the cold bed. Material in the hot bed is directly discharged to the cold bed through a chute. Each bed has its own independent blower; the hot bed blower delivers hot air (after steam heat exchange) to the hot bed, while the cold bed blower delivers cold air to the cold bed, ensuring proper fluidization in each bed. Therefore, precise adjustment of the air pressure within the hot and cold beds is unnecessary, increasing operational flexibility, simplifying operation and control, and facilitating the production and control of the drying system.

[0049] Furthermore, by calculating the pressure drop, raising the hot bed by more than 700mm can generally achieve a better material discharge effect. After the hot bed and cold bed are separated, in addition to the hot material discharged to the cold bed, other heat transfer paths are blocked. After the hot material is cooled by the cold bed, the temperature can meet the production requirements.

[0050] Furthermore, both the hot and cold beds have a multi-chamber structure, with each chamber receiving air independently. Airflow adjustment creates a pressure difference before and after the air distribution plate, causing the material to generate a forward vector force under the combined action of the fluidizing air and the pressure difference within the bed. This causes the material to continuously jump forward, eventually flowing over the partition and down the chute at the front of the hot bed. The height difference between the hot and cold beds overcomes the pressure difference between the front and rear of the fluidized bed, allowing the material to enter the cold bed under gravity. Because the hot and cold beds are independently set up, the heat transferred from the hot bed to the cold bed is only the material's own heat. Compared to traditional internally heated fluidized bed dryers, this avoids the problems of hot air leakage from the fluidizing air, which hinders operation and adjustment, and the high material temperature after drying caused by heat conduction within the bed. This is a conventional setup known to those skilled in the art and will not be elaborated further here.

[0051] In one embodiment, please refer to Figure 4 The fluidized bed drying system also includes a star-shaped discharge valve 600, which is installed on the high-temperature fluidized bed 100 and is used to discharge the clumps of material inside the high-temperature fluidized bed 100.

[0052] By setting a star-shaped discharge valve 600, the clumps at the bottom of the hot bed can be periodically discharged to the outside of the bed. Since it no longer passes through the cooling bed, the path is shorter. Compared with the traditional internally heated fluidized bed, this hot and cold bed separated internally heated fluidized bed is more reliable in discharging salt clumps. It can ensure that the fluidization state of the hot bed is always maintained well, and solves the problem of difficult discharge of salt clumps in the hot bed and easy caking of the air distribution plate in the traditional internally heated fluidized bed dryer.

[0053] Furthermore, the rotary valve 600 here is a common and readily available discharge valve on the market, and is a conventional setting known to those skilled in the art, so it will not be described in detail here.

[0054] To better understand this utility model, the following is combined with... Figures 1 to 4 The technical solution of this utility model is described in detail below: A feeding pipe 300 is positioned between a high-temperature fluidized bed 100 and a low-temperature fluidized bed 200, and is connected to the discharge end of the high-temperature fluidized bed 100 and the feed end of the low-temperature fluidized bed 200, respectively. This allows the material dried in the high-temperature fluidized bed 100 to be transferred to the low-temperature fluidized bed 200 for cooling. An impact member 420 is connected to the feeding pipe 300 via a support 410 and can reciprocate relative to the support 410 under the drive of the drive member 430, striking the feeding pipe 300. Compared to existing technologies, by providing the impact member 420 relative to the feeding pipe 300, the impact member 420 can continuously strike the feeding pipe 300 under the drive of the drive member 430, inducing vibration of the pipe wall. This causes small particles adhering to the inner wall of the feeding pipe 300 due to static electricity to separate from the feeding pipe 300, thereby preventing material blockage within the feeding pipe 300.

[0055] In the specific working process of this utility model, during use, the material is transferred from the high-temperature hot bed to the low-temperature cold bed after being dried through the feeding pipe 300. The drive motor 4313 drives the drive gear 4312 to intermittently mesh with the rack 4311, causing the sliding rod 422 to slide relative to the first segment 411 of the support 410 close to the outer wall of the feeding pipe 300. When the drive gear 4312 separates from the gear, the sliding rod 422 slides away from the first segment 411 of the support 410 relative to the outer wall of the feeding pipe 300 and resets under the drive of the elastic part 432. By repeating this operation, the outer wall of the feeding pipe 300 can be intermittently struck, shaking the material off and preventing blockage.

[0056] This application, through the aforementioned structure, can solve the technical problem of blockage caused by the adhesion of fine particulate matter to the inner wall of the conveying pipeline due to improper material properties and flow control, resulting in the transfer of material from the hot bed to the cold bed.

[0057] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A material conveying device configured to connect a high-temperature fluidized bed and a low-temperature fluidized bed, characterized by, include: A feeding pipe is disposed between the high-temperature fluidized bed and the low-temperature fluidized bed, and is connected to the discharge end of the high-temperature fluidized bed and the feed end of the low-temperature fluidized bed, respectively. as well as The striking assembly includes a support, a striking element, and a driving element. The support is connected to the outer wall of the feed tube. The striking element is disposed relative to the feed tube and can slide relative to the support. The driving element is connected to the feed tube and the support and is used to drive the striking element to slide back and forth relative to the support and strike the feed tube.

2. The material conveying apparatus of claim 1, wherein The diameter of the feed pipe gradually decreases along the direction of the feed end near the low-temperature fluidized bed, and its axis is inclined downward relative to the low-temperature fluidized bed.

3. The material delivery apparatus of claim 1, wherein, The support has a first segment and a second segment. One end of the first segment is connected to the outer wall of the feeding pipe. The second segment is parallel to and spaced apart from the outer wall of the feeding pipe and is connected to the first segment. The first segment has a through groove relative to the outer wall of the feeding pipe. The striking element includes a striking block and a sliding rod. The striking block is disposed relative to the outer wall of the feeding pipe. One end of the sliding rod is connected to the striking block, and the other end is slidably inserted into the through groove.

4. The material delivery apparatus of claim 3, wherein, The two inner sidewalls opposite to the through groove are respectively provided with at least one spherical groove. The striking member also includes at least two rolling parts, which are rotatably built into the spherical groove and abut against the sliding rod.

5. The material delivery apparatus of claim 3, wherein, The driving component includes a driving part and an elastic part. The driving part has a fixed end and a movable end. The fixed end of the driving part is connected to the first segment of the support, and the movable end is connected to the sliding rod. It is used to drive the sliding rod and the striking block to slide closer to the feeding tube. One end of the elastic part is connected to the sliding rod, and the other end is connected to the first segment of the support. It is used to drive the sliding rod to slide relative to the first segment of the support and then automatically reset.

6. The material delivery apparatus of claim 5, wherein, The driving unit includes a rack, a driving gear, and a driving motor. The rack is arranged along the guide of the sliding rod and connected to the sliding rod. The driving gear is in the shape of a half-spherical gear and meshes with the rack. The fixed end of the driving motor is connected to the first segment of the support, and the output shaft is coaxially arranged with the driving gear and connected to the driving gear, for driving the sliding rod to slide relative to the first segment of the support.

7. The material delivery apparatus of claim 6, wherein, The cross-sectional area of ​​the striking block gradually decreases along the direction close to the feed pipe and forms an arc-shaped striking part. The striking element also includes an elastic sleeve, which is sleeved on the striking part.

8. The material delivery apparatus of claim 7, wherein, The material conveying device also includes a protective cover, which covers the second section of the support, the striking block, the sliding rod, the rack, the drive gear and the drive motor, and is connected to the first section of the support.

9. A fluid bed drying system characterized by, The device includes a high-temperature fluidized bed, a low-temperature fluidized bed, and a feeding device as described in any one of claims 1-8, wherein the feeding pipe is disposed between the high-temperature fluidized bed and the low-temperature fluidized bed, and is respectively connected to the discharge end of the high-temperature fluidized bed and the feed end of the low-temperature fluidized bed.

10. The fluid bed drying system of claim 9, wherein, The fluidized bed drying system further comprises a star-shaped discharge valve arranged on the high-temperature fluidized bed for discharging the lumps in the high-temperature fluidized bed.

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