Horizontal fluidized bed dryer with convenient discharging
By introducing arch-breaking and anti-clogging mechanisms into the horizontal fluidized bed dryer, and using a dual-axis servo motor to drive the scraper and guide chain in linkage, the clogging problem caused by poor material flowability is solved, achieving efficient discharge and stable production.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NANJING KAIOU MACHINERY MFG
- Filing Date
- 2025-07-31
- Publication Date
- 2026-06-09
AI Technical Summary
The discharge structure of traditional horizontal fluidized bed dryers has poor material flowability, which easily leads to bridging, resulting in frequent blockages and affecting production efficiency.
The system employs an arch-breaking mechanism and an anti-blocking mechanism. It utilizes a dual-axis servo motor to drive the scraper and guide chain in a coordinated manner to form a three-dimensional dynamic disturbance network, which breaks down the material bridging layer and transforms the material flow into a spiral flow through the spiral blades to prevent blockage.
It improves material flowability and discharge efficiency, prevents blockages, and enhances production efficiency and equipment operational stability.
Smart Images
Figure CN224340494U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of dryer technology, and in particular to a horizontal fluidized bed dryer that facilitates material discharge. Background Technology
[0002] A horizontal fluidized bed dryer is a continuous equipment that achieves efficient drying by using hot air to make materials boil. It is also known as a fluidized bed dryer. Its core structure consists of an air filter, heater, fluidized bed main unit, cyclone separator, bag filter, high-pressure centrifugal fan and operating platform. The combination of dust removal equipment can be selected according to the characteristics of the material.
[0003] Its working principle is as follows: clean hot air is distributed into the bed through the valve plate. After the wet material enters from the feeder, it forms a boiling state under the action of hot air and air pressure. The particles are suspended and violently tumble, and fully contact with the hot air to complete heat and mass transfer, thereby achieving rapid drying. The material enters from one end of the bed and automatically flows out from the other end after boiling and drying for tens of seconds to minutes. The exhaust gas is purified by the dust removal system and then discharged into the air.
[0004] This equipment is suitable for industries such as pharmaceuticals, chemicals, food, and feed. It can process powdery or granular materials with a particle size of 0.1-6mm. It features fast drying speed, uniform temperature, stable product quality, and high degree of automation, and meets the GMP requirements for pharmaceutical production.
[0005] However, the discharge structure of traditional horizontal fluidized bed dryers has a technical defect of poor material flowability. During the discharge process, bridging is easily formed inside the discharge hopper, resulting in poor material flow, frequent blockages, and serious impact on production efficiency.
[0006] For example, in the production process of a chemical company, a traditional horizontal fluidized bed dryer is used to dry a certain powdered chemical raw material. During the discharge stage, due to the poor flowability of the material, a large amount of powder gradually accumulates inside the discharge hopper. Over time, the powder particles support and overlap each other, forming a stable bridging structure. This prevents the material from smoothly discharging from the discharge port, causing the material to accumulate more and more inside the dryer. This not only leads to the equipment malfunctioning but also causes production line interruptions. Workers are forced to frequently stop the machine and manually clear the blockage, which not only consumes a lot of manpower and time but also seriously affects overall production efficiency and increases production costs. Utility Model Content
[0007] This utility model discloses a horizontal fluidized bed dryer that facilitates material discharge, aiming to solve the technical defects of poor material flowability in the discharge structure. During the discharge process, bridging is easily formed inside the discharge hopper, resulting in poor material flow, frequent blockages, and serious impact on production efficiency.
[0008] To achieve the above objectives, the present invention adopts the following technical solution:
[0009] A horizontal fluidized bed dryer for easy material discharge includes a dryer body, a feed pipe, and three discharge hoppers, and also includes:
[0010] Arch-breaking mechanism: The arch-breaking mechanism is installed on the inner wall of the discharge hopper. The inner wall of the discharge hopper is provided with a first support frame and two second support frames. Four guide chains are provided on the bottom outer wall of the first support frame. A dual-axis servo motor is provided on the outer wall of the two second support frames on opposite sides. A first assembly rod is provided at one output end of the dual-axis servo motor. Four connecting rods are provided on the circumferential outer wall of the first assembly rod. A scraper is provided at one end of the connecting rod. One end of the guide chain is hinged to the outer wall of the scraper.
[0011] Anti-blocking mechanism: The anti-blocking mechanism is located at the other output end of the dual-axis servo motor.
[0012] In this case, the arch-breaking mechanism and the anti-blocking mechanism are driven by a dual-axis servo motor to achieve functional decoupling and synergistic efficiency. The arch-breaking mechanism adopts a linkage design of scraper and guide chain. The scraper performs periodic bidirectional scraping on the inner wall of the hopper under the drive of the dual-axis servo motor. Combined with the disturbance effect of the flexible guide chain, a three-dimensional dynamic disturbance network is formed, which can effectively destroy the bridging layer of dry material, enhance the fluidity of material in the discharge hopper, and improve the discharge efficiency.
[0013] In a preferred embodiment, the anti-blocking mechanism includes a second mounting rod, one end of which is connected to the other output end of the dual-axis servo motor, and a helical blade is provided on the outer circumferential wall of the second mounting rod.
[0014] Specifically, the spiral blades generate thrust under the drive of a dual-axis servo motor, enabling the material to obtain stable downward conveying kinetic energy in the discharge port area of the hopper, transforming the material from a "plunger flow" to a "spiral flow," thus avoiding local accumulation caused by uneven flow velocity.
[0015] As described above, a horizontal fluidized bed dryer for easy material discharge includes a dryer body, a feed pipe, and three discharge hoppers. It also includes: an arch-breaking mechanism: the arch-breaking mechanism is located on the inner wall of the discharge hopper. A first support frame and two second support frames are provided on the inner wall of the discharge hopper. Four guide chains are provided on the bottom outer wall of the first support frame. A dual-axis servo motor is provided on the outer wall of one opposite side of the two second support frames. A first assembly rod is provided at one output end of the dual-axis servo motor. Four connecting rods are provided on the circumferential outer wall of the first assembly rod. A scraper is provided at one end of each connecting rod, and one end of the guide chain is hinged to the outer wall of the scraper. An anti-clogging mechanism: the anti-clogging mechanism is located at the other output end of the dual-axis servo motor. The horizontal fluidized bed dryer for easy material discharge provided by this utility model has the technical effects of improving discharge efficiency and preventing clogging. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the overall structure of a horizontal fluidized bed dryer that facilitates material discharge, as proposed in this utility model.
[0017] Figure 2 This is a schematic diagram of the discharge hopper structure of a horizontal fluidized bed dryer that facilitates material discharge, as proposed in this utility model.
[0018] Figure 3 This is a schematic diagram of the cross-sectional structure of the discharge hopper of a horizontal fluidized bed dryer that facilitates material discharge, as proposed in this utility model.
[0019] Figure 4 This is a schematic diagram of the arch-breaking mechanism of a horizontal fluidized bed dryer that facilitates material discharge, as proposed in this utility model.
[0020] In the attached diagram: 1. Dryer body; 2. Feed pipe; 3. Discharge hopper; 4. First support frame; 5. Scraper; 6. Guide chain; 7. Second support frame; 8. Dual-axis servo motor; 9. First assembly rod; 10. Second assembly rod; 11. Spiral blade; 12. Connecting rod. Detailed Implementation
[0021] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and marked in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.
[0022] The present invention discloses a horizontal fluidized bed dryer for easy material discharge, which is mainly used in scenarios where the discharge structure has technical defects such as poor material flowability. During the discharge process, bridging is easily formed inside the discharge hopper, resulting in poor material flow, frequent blockages, and serious impact on production efficiency.
[0023] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4 A horizontal fluidized bed dryer for easy discharge includes a dryer body 1, a feed pipe 2, and three discharge hoppers 3. It also includes: an arch-breaking mechanism: the arch-breaking mechanism is located on the inner wall of the discharge hoppers 3. A first support frame 4 and two second support frames 7 are located on the inner wall of the discharge hoppers 3. Four guide chains 6 are located on the bottom outer wall of the first support frame 4. A dual-axis servo motor 8 is located on the opposite outer wall of the two second support frames 7. A first assembly rod 9 is located at one output end of the dual-axis servo motor 8. Four connecting rods 12 are located on the circumferential outer wall of the first assembly rod 9. A scraper 5 is located at one end of each connecting rod 12, and one end of the guide chain 6 is hinged to the outer wall of the scraper 5. An anti-blocking mechanism: the anti-blocking mechanism is located at the other output end of the dual-axis servo motor 8.
[0024] The feed pipe 2 is located on one side of the outer wall of the dryer body 1, and the discharge hopper 3 is located on the bottom outer wall of the dryer body 1.
[0025] The first support frame 4 is set on the inner wall of the discharge hopper 3 near the inlet, the second support frame 7 is set on the inner wall of the discharge hopper 3 near the outlet, and the guide chain 6 is made of stainless steel chain.
[0026] In practical applications, the guide chain 6 is slightly longer in vertical height than the scraper 5. The longer guide chain 6 allows for a larger rotation angle, which can reduce chain tension, prevent breakage, thereby improving material flow and reducing material accumulation.
[0027] In this scheme, the dual-axis servo motor 8 is a Kollmorgen AKM dual-output-axis synchronous servo motor. The reciprocating end of the dual-axis servo motor 8 uses a stepper motor driver or a servo driver to control the forward and reverse rotation of the motor through pulse signals and direction signals. Combined with encoder feedback, an angle closed loop is achieved. Its unidirectional end uses a frequency converter or a DC speed controller to drive the motor to rotate in one direction at a constant frequency. The speed is maintained stably through dual closed-loop control of current loop or speed loop.
[0028] In a specific implementation, the arch-breaking mechanism and the anti-blocking mechanism are driven by a dual-axis servo motor 8 to achieve functional decoupling and synergistic efficiency. The arch-breaking mechanism adopts a linkage design of scraper 5 and guide chain 6. Under the drive of the dual-axis servo motor 8, scraper 5 periodically scrapes the inner wall of the hopper in both directions. Combined with the disturbance effect of the flexible guide chain 6, a three-dimensional dynamic disturbance network is formed, which can effectively destroy the bridging layer of dry materials, enhance the fluidity of materials in the discharge hopper 3, and improve the discharge efficiency.
[0029] Reference Figure 2 and Figure 4 In a preferred embodiment, one end of the first assembly rod 9 is conical, and the cross-section of the scraper rod 5 is fan-shaped.
[0030] It should be noted that the conical end design enhances the arch-breaking ability through dynamic turbulence effect. Its cone angle can be set to 60°. When rotating, it can form a local material disturbance field, which increases the shear force on the bridging layer. The fan-shaped cross section forms a wedge shear force when scraping material, which improves the arch-breaking efficiency of the scraper and reduces the volume of the material retention area.
[0031] Reference Figure 3 and Figure 4 In a preferred embodiment, the anti-blocking mechanism includes a second mounting rod 10, one end of which is connected to the other output end of the dual-axis servo motor 8, and a spiral blade 11 is provided on the outer circumferential wall of the second mounting rod 10.
[0032] Specifically, the spiral blades 11 generate thrust under the drive of the dual-axis servo motor 8, enabling the material to obtain stable downward conveying kinetic energy in the discharge port area of the discharge hopper 3, transforming the material from "plunger flow" to "spiral flow", thus avoiding local accumulation caused by uneven flow velocity.
[0033] Reference Figure 3 In a preferred embodiment, the distance between the outer edge of the spiral blade 11 and the inner wall of the discharge hopper 3 near the discharge port is 5-8 mm.
[0034] The 5-8mm spacing design achieves a balance between preventing material jamming and efficient anti-clogging. This spacing can prevent large particles with a diameter of 10mm or more from getting stuck, while ensuring that the spiral blades 11 can forcefully peel off the material from the wall surface.
[0035] Working principle: When in use, the dual-axis servo motor 8 is started. One output end drives the first assembly rod 9 to rotate, which in turn causes the connecting rod 12 to rotate the scraper 5. The scraper 5 periodically scrapes the inner wall of the discharge hopper 3 in both directions. At the same time, the guide chain 6 moves with the scraper 5 to form a three-dimensional dynamic disturbance network, which breaks the dry material bridging layer. The other output end drives the second assembly rod 10 to rotate, and the spiral blade 11 rotates accordingly, forming thrust to transform the material from "plunger flow" to "spiral flow", so that the material is stably conveyed downward in the discharge port area.
[0036] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. The substitutions may be replacements of some structures, devices, or method steps, or they may be complete technical solutions. Equivalent substitutions or modifications made based on the technical solution and inventive concept of this utility model should all be covered within the protection scope of this utility model.
Claims
1. A horizontal fluidized bed dryer for easy discharge, comprising a dryer body (1), a feed pipe (2), and three discharge hoppers (3), characterized in that, Also includes: Arch breaking mechanism: The arch breaking mechanism is set on the inner wall of the discharge hopper (3). The inner wall of the discharge hopper (3) is provided with a first support frame (4) and two second support frames (7). Four guide chains (6) are set on the bottom outer wall of the first support frame (4). A dual-axis servo motor (8) is set on the opposite side outer wall of the two second support frames (7). A first assembly rod (9) is set on one of the output ends of the dual-axis servo motor (8). Four connecting rods (12) are set on the circumferential outer wall of the first assembly rod (9). A scraper (5) is set on one end of the connecting rod (12). One end of the guide chain (6) is hinged to the outer wall of the scraper (5). Anti-blocking mechanism: The anti-blocking mechanism is located at the other output end of the dual-axis servo motor (8).
2. The horizontal fluidized bed dryer for easy material discharge according to claim 1, characterized in that, One end of the first assembly rod (9) is conical, and the cross-section of the scraper rod (5) is fan-shaped.
3. A horizontal fluidized bed dryer for easy material discharge according to claim 2, characterized in that, The guide chain (6) is made of stainless steel.
4. A horizontal fluidized bed dryer for easy material discharge according to claim 1, characterized in that, The anti-blocking mechanism includes a second mounting rod (10), one end of which is connected to the other output end of the dual-axis servo motor (8), and a spiral blade (11) is provided on the outer circumferential wall of the second mounting rod (10).
5. A horizontal fluidized bed dryer for easy material discharge according to claim 4, characterized in that, The distance between the outer edge of the spiral blade (11) and the inner wall of the discharge hopper (3) near the discharge port is 5-8 mm.
6. A horizontal fluidized bed dryer for easy material discharge according to claim 5, characterized in that, The first support frame (4) is disposed on the inner wall of the discharge hopper (3) near the feed inlet, and the second support frame (7) is disposed on the inner wall of the discharge hopper (3) near the discharge outlet.
7. A horizontal fluidized bed dryer for easy material discharge according to claim 1, characterized in that, The feed pipe (2) is located on one side of the outer wall of the dryer body (1), and the discharge hopper (3) is located on the bottom outer wall of the dryer body (1).