Closed cycle horizontal fluid bed dryer

Abstract

The utility model relates to drying machine technical field discloses closed circuit circulation horizontal type boiling drying machine, including frame, fixedly installed with horizontal type boiling drying machine main part on the frame, the bottom of horizontal type boiling drying machine main part is installed with heating assembly, the top of horizontal type boiling drying machine main part is installed with exhaust component, the inside horizontal type boiling drying machine main part is installed with the butt joint screen plate, the both sides of horizontal type boiling drying machine main part are installed with feeding assembly and discharge hopper respectively, the bottom of butt joint screen plate is installed with knock component, the utility model discloses through motor drive multiple connecting rods synchronous rotation through the belt, drive fixed ring on by connecting spring connection knock ball elastic knock butt joint screen plate, can all -round, dead -angle material that adheres on the screen plate of earthquake, effectively prevent mesh block, guarantee circulating hot air even penetration, avoid material local overheating or drying not thoroughly, ensure the consistency of drying effect.

Description

Technical Field

[0001] This utility model relates to the field of dryer technology, and in particular to a closed-loop horizontal fluidized bed dryer. Background Technology

[0002] Closed-loop horizontal fluidized bed dryers, with their core advantages of closed-loop airflow circulation and horizontal fluidized bed drying, have become key equipment for drying heat-sensitive, easily oxidized, and solvent-containing materials in industries such as pharmaceuticals, chemicals, and food. By circulating nitrogen in a closed system, they can avoid oxidation and deterioration caused by contact between materials and outside air, and efficiently recover solvents and heat in the circulating airflow. They are widely used in the drying and processing of materials such as antibiotics, traditional Chinese medicine extracts, and fine chemical intermediates.

[0003] In the working process of a closed-loop horizontal fluidized bed dryer, the receiving mesh plate is the core component for bearing and airflow distribution. It is horizontally installed inside the horizontal cylinder of the dryer and achieves uniform penetration of circulating hot air through the mesh holes, so that the hot air can fully contact the material to complete the evaporation of moisture.

[0004] However, in actual hot drying processes, most materials to be dried will become sticky due to softening, melting, or moisture absorption during heating. In the early stages of drying, they are prone to adhering to the surface of the mesh plate. As the drying process progresses, the adhering material will gradually accumulate and block the mesh holes, causing the circulating hot air to be unable to penetrate the bed evenly, resulting in local overheating or incomplete drying. In severe cases, the sudden increase in airflow resistance will cause the circulating fan to overload, triggering the equipment shutdown protection.

[0005] No effective solutions have yet been proposed to address the problems in the relevant technologies.

[0006] Therefore, in order to solve the above problems, this utility model provides a closed-loop horizontal fluidized bed dryer. Utility Model Content

[0007] The purpose of this invention is to provide a closed-loop horizontal fluidized bed dryer to solve the problems of material adhesion and mesh blockage that are mentioned in the background art.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a closed-loop horizontal fluidized bed dryer, comprising a frame, on which a horizontal fluidized bed dryer body is fixedly mounted; a heating assembly is mounted at the bottom of the horizontal fluidized bed dryer body; an exhaust assembly is mounted at the top of the horizontal fluidized bed dryer body; a receiving mesh plate is horizontally mounted inside the horizontal fluidized bed dryer body; a feeding assembly and a discharging hopper are respectively mounted on both sides of the horizontal fluidized bed dryer body; and a striking assembly is mounted at the bottom of the receiving mesh plate; the striking assembly includes connecting rods, fixing rings, connecting springs, striking balls, belts, and a motor; multiple connecting rods are mounted parallel to each other and rotatably on the inner wall of the horizontal fluidized bed dryer body; a fixing ring is fitted on each connecting rod; the fixing ring is connected to the striking ball via a connecting spring; adjacent connecting rods are connected via belt drive; the motor is connected to one of the connecting rods and drives it to rotate; and the motor is fixedly mounted on the outer surface of the horizontal fluidized bed dryer body.

[0009] As a preferred technical solution of this utility model, the heating component includes a closed-loop fan, a heater, a nitrogen inlet pipe, an air supply pipe, and a distribution pipe. The output end of the closed-loop fan is connected to the heater, the heater is connected to the distribution pipe through the air supply pipe, the distribution pipe is connected to the bottom of the horizontal fluidized bed dryer body, and the nitrogen inlet pipe is connected to the output end of the closed-loop fan.

[0010] As a preferred technical solution of this utility model, the exhaust assembly includes an exhaust pipe, an induced draft pipe and an induced draft fan. The exhaust pipe passes through the top of the main body of the horizontal fluidized bed dryer, and the exhaust pipe is connected to the induced draft fan through the induced draft pipe.

[0011] As a preferred technical solution of this utility model, the feeding assembly includes a feeding hopper, a rotating rod, crushing blades and a handwheel. The feeding hopper is connected to the main body of the horizontal fluidized bed dryer. The rotating rod is rotatably disposed in the feeding hopper. Crushing blades are installed on the rotating rod. One end of the rotating rod extends out of the feeding hopper and is connected to the handwheel.

[0012] As a preferred technical solution of this utility model, the diversion pipes are multiple and evenly distributed at the bottom of the horizontal fluidized bed dryer, and the air outlets of the diversion pipes face downwards from the receiving mesh plate.

[0013] As a preferred embodiment of this utility model, the exhaust pipe is provided with multiple exhaust ports, and the air duct is connected to the exhaust ports of the exhaust pipe.

[0014] As a preferred technical solution of this utility model, the crushing blades are in multiple groups and are distributed at intervals along the axial direction of the rotating rod, and each group of crushing blades consists of multiple blades and are evenly distributed along the circumference of the rotating rod.

[0015] As a preferred embodiment of this utility model, the striking ball is made of an elastic material, and the diameter of the striking ball is larger than the mesh diameter of the receiving mesh plate.

[0016] Compared with the prior art, the beneficial effects of this utility model are: This invention uses a motor to drive multiple connecting rods to rotate synchronously via a belt. This causes a striking ball connected by a connecting spring on a fixed ring to elastically strike the receiving mesh plate. This method can shake off materials adhering to the mesh plate from all directions without blind spots, effectively preventing mesh blockage, ensuring uniform penetration of circulating hot air, avoiding localized overheating or incomplete drying of materials, and ensuring consistent drying results. The crushing blades of the feeding component can pre-crush large pieces of material, reducing the risk of mesh plate blockage caused by agglomeration and ensuring uniform feeding. Furthermore, the heating component uses a closed-loop nitrogen circulation system, which not only prevents material oxidation and deterioration but also efficiently recovers heat and solvents, meeting energy-saving, consumption-reducing, and environmental protection requirements. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a partial cross-sectional structural diagram of the present invention; Figure 3 This is a schematic diagram of the feeding assembly in this utility model; Figure 4 This is a schematic diagram of the striking component in this utility model.

[0018] In the diagram: 1. Frame; 2. Main body of horizontal fluidized bed dryer; 3. Heating assembly; 31. Closed-loop fan; 32. Heater; 33. Nitrogen inlet pipe; 34. Air supply pipe; 35. Diverter pipe; 4. Exhaust assembly; 41. Exhaust pipe; 42. Exhaust duct; 43. Exhaust fan; 5. Receiving mesh plate; 6. Feeding assembly; 61. Feeding hopper; 62. Rotating rod; 63. Crushing blade; 64. Handwheel; 7. Discharge hopper; 8. Impact assembly; 81. Connecting rod; 82. Fixing ring; 83. Connecting spring; 84. Impact ball; 85. Belt; 86. Motor. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Example Please see Figures 1-4 This utility model provides a technical solution: A closed-loop horizontal fluidized bed dryer includes a frame 1, on which a horizontal fluidized bed dryer body 2 is fixedly mounted. A heating assembly 3 is installed at the bottom of the horizontal fluidized bed dryer body 2, and an exhaust assembly 4 is installed at the top of the horizontal fluidized bed dryer body 2. A receiving mesh plate 5 is horizontally installed inside the horizontal fluidized bed dryer body 2. A feeding assembly 6 and a discharging hopper 7 are respectively installed on both sides of the horizontal fluidized bed dryer body 2. A striking assembly 8 is installed at the bottom of the receiving mesh plate 5. The striking assembly 8 includes connecting rods 81, fixing rings 82, connecting springs 83, striking balls 84, belts 85, and a motor 86. Multiple connecting rods 81 are installed parallel to each other and rotate on the inner wall of the horizontal fluidized bed dryer body 2. A fixing ring 82 is fitted on each connecting rod 81. The fixing ring 82 passes through... The connecting spring 83 connects to the striking ball 84. Two adjacent connecting rods 81 are connected by a belt 85. The motor 86 is connected to one of the connecting rods 81 and drives it to rotate. The motor 86 is fixedly installed on the outer surface of the main body 2 of the horizontal fluidized bed dryer. The striking component 8 is synchronously driven by multiple parallel rotating connecting rods 81 via the belt 85, and driven by the motor 86. This causes the striking ball 84, connected by the connecting spring 83, on the fixed ring 82 to elastically strike the receiving mesh plate 5. This can shake off the sticky material evenly from all directions, effectively preventing mesh blockage, ensuring the uniformity of hot air penetration, and avoiding uneven drying of materials. The elastic buffer of the connecting spring 83 makes the striking force gentle and controllable, ensuring the unblocking effect while preventing the receiving mesh plate 5 from deforming due to rigid impact, thus extending its service life.

[0021] Please see Figure 1 and Figure 2 The heating component 3 includes a closed-loop fan 31, a heater 32, a nitrogen inlet pipe 33, an air supply pipe 34, and a distribution pipe 35. The output end of the closed-loop fan 31 is connected to the heater 32. The heater 32 is connected to the distribution pipe 35 through the air supply pipe 34. The distribution pipe 35 is connected to the bottom of the horizontal fluidized bed dryer body 2. The nitrogen inlet pipe 33 is connected to the output end of the closed-loop fan 31. The connection between the closed-loop fan 31 and the heater 32 can realize the airflow circulation in the closed system, which can not only efficiently recover the heat and solvent in the drying process, reduce energy loss and environmental treatment costs, but also prevent outside air from entering the system and interfering with the drying of materials.

[0022] Please see Figure 2The exhaust assembly 4 includes an exhaust pipe 41, an induced draft pipe 42, and an induced draft fan 43. The exhaust pipe 41 penetrates the top of the horizontal fluidized bed dryer body 2 and is connected to the induced draft fan 43 through the induced draft pipe 42. The exhaust pipe 41 penetrates the top of the horizontal fluidized bed dryer body 2 and can directly and quickly discharge the water vapor, solvent vapor, and other waste gases generated during the drying process from the inside of the body, avoiding the waste gas from stagnating inside, which would cause the material to absorb moisture or reduce the drying efficiency. The induced draft fan 43 is connected to the exhaust pipe 41 through the induced draft pipe 42. The negative pressure generated by the induced draft fan 43 can enhance the exhaust power, effectively maintain the airflow balance inside the horizontal fluidized bed dryer body 2, and ensure that the hot airflow delivered by the heating assembly 3 can circulate smoothly, providing a favorable airflow environment for the material to stably form a fluidized bed.

[0023] Please see Figure 1-3 The feeding assembly 6 includes a feeding hopper 61, a rotating rod 62, crushing blades 63, and a handwheel 64. The feeding hopper 61 is connected to the main body 2 of the horizontal fluidized bed dryer. The rotating rod 62 is rotatably mounted inside the feeding hopper 61, and the crushing blades 63 are installed on the rotating rod 62. One end of the rotating rod 62 extends out of the feeding hopper 61 and is connected to the handwheel 64. The feeding hopper 61 is directly connected to the main body 2 of the horizontal fluidized bed dryer, ensuring a smooth material conveying path and preventing stagnation or blockage during the feeding process. The rotating rod 62 drives the crushing blades 63 to rotate, which can pre-crush agglomerated materials, effectively reducing the risk of large pieces of material entering the main body and causing blockage of the receiving mesh plate 5. At the same time, it ensures uniform material particle size and improves the stability and uniformity of the subsequent drying process. One end of the rotating rod 62 is connected to the handwheel 64, which can be manually adjusted, making the operation flexible and convenient without the need for an additional power device, thus reducing equipment energy consumption and maintenance costs.

[0024] Please see Figure 1 and Figure 2 Multiple diversion pipes 35 are evenly distributed at the bottom of the main body 2 of the horizontal fluidized bed dryer. The air outlet of the diversion pipes 35 faces downwards from the receiving mesh plate 5. The even distribution of multiple diversion pipes 35 at the bottom of the main body 2 of the horizontal fluidized bed dryer allows the hot airflow delivered by the heating component 3 to form a uniform airflow field below the receiving mesh plate 5, avoiding unstable material boiling caused by uneven local airflow strength. This effectively ensures the consistency of material drying in all areas of the receiving mesh plate 5 and prevents problems such as local overheating and coking or incomplete drying.

[0025] Please see Figure 1 and Figure 2 The exhaust pipe 41 is equipped with multiple exhaust ports, and the exhaust pipe 42 is connected to the exhaust ports of the exhaust pipe 41. The multiple exhaust ports on the exhaust pipe 41 can discharge exhaust gas simultaneously from different positions on the top of the horizontal fluidized bed dryer body 2, avoiding local exhaust gas retention caused by a single exhaust port, ensuring uniform and stable air pressure inside the body, and preventing pressure imbalance from affecting the boiling state and drying uniformity of the material.

[0026] Please see Figure 3 The crushing blades 63 are in multiple groups and are spaced apart along the axial direction of the rotating rod 62. Each group of crushing blades 63 consists of multiple blades and is evenly distributed around the circumference of the rotating rod 62. The multiple groups of blades are spaced apart along the axial direction of the rotating rod 62, which can cover the material at different axial positions in the hopper 61 and prevent local material from entering the dryer body directly without being crushed.

[0027] Please see Figure 4 The striking ball 84 is made of elastic material. The diameter of the striking ball 84 is larger than the mesh diameter of the receiving plate 5. The elastic material of the striking ball 84 can form a flexible buffer when striking the receiving plate 5, avoiding rigid impact that could cause deformation or damage to the plate. At the same time, it enhances the fit with the plate to improve the shaking effect.

[0028] Working principle: During operation, materials are fed through the feeding hopper 61. If the feeding process of the feeding hopper 61 is not smooth or blocked, the rotating rod 62 can be rotated by the handwheel 64 of the feeding component 6, which drives the crushing blades 63 to crush the material and send it into the main body 2 of the horizontal fluidized bed dryer to prevent blockage. Nitrogen gas is introduced through the nitrogen inlet pipe 33 and delivered to the heater 32 by the closed circulation fan 31 of the heating component 3. The hot gas flow is sent to the bottom of the main body 2 of the horizontal fluidized bed dryer through the air supply pipe 34 and multiple evenly distributed diversion pipes 35. The material is dried by penetrating the receiving mesh plate 5 to form a fluidized bed; during this process, the motor 86 of the striking component 8 drives multiple connecting rods 81 to rotate synchronously via belt 85, and the striking ball 84 on the fixed ring 82 elastically strikes the receiving mesh plate 5 through the connecting spring 83 to prevent material from sticking and clogging; the exhaust gas generated during drying is discharged by the induced draft fan 43 through the exhaust pipe 41 and the induced draft pipe 42 of the exhaust component 4, and the dried material is discharged from the discharge hopper 7. The material is protected from oxidation and heat is recovered through a closed nitrogen circulation system, ensuring continuous and efficient drying.

[0029] In the description of this utility model, it should be understood that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this utility model and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0030] In this utility model, unless otherwise explicitly specified and limited, for example, it can be a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components or an interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A closed-loop horizontal fluidized bed dryer, comprising a frame (1), characterized in that: A horizontal fluidized bed dryer body (2) is fixedly installed on the frame (1). A heating component (3) is installed at the bottom of the horizontal fluidized bed dryer body (2). An exhaust component (4) is installed at the top of the horizontal fluidized bed dryer body (2). A receiving mesh plate (5) is horizontally installed inside the horizontal fluidized bed dryer body (2). A feeding component (6) and a discharging hopper (7) are respectively installed on both sides of the horizontal fluidized bed dryer body (2). A striking component (8) is installed at the bottom of the receiving mesh plate (5). The striking component (8) includes a connecting rod (81), a fixing ring (82), and a connecting rod (83). The system includes a spring (83), a striking ball (84), a belt (85), and a motor (86). The connecting rods (81) are multiple and are installed in parallel and rotating on the inner wall of the horizontal fluidized bed dryer body (2). Each connecting rod (81) is fitted with a fixing ring (82). The fixing ring (82) is connected to the striking ball (84) through the connecting spring (83). Two adjacent connecting rods (81) are connected by a belt (85). The motor (86) is connected to one of the connecting rods (81) and drives it to rotate. The motor (86) is fixedly installed on the outer surface of the horizontal fluidized bed dryer body (2).

2. The closed-loop horizontal fluidized bed dryer according to claim 1, characterized in that: The heating assembly (3) includes a closed-loop fan (31), a heater (32), a nitrogen inlet pipe (33), an air supply pipe (34), and a branch pipe (35). The output end of the closed-loop fan (31) is connected to the heater (32). The heater (32) is connected to the branch pipe (35) through the air supply pipe (34). The branch pipe (35) is connected to the bottom of the horizontal boiling dryer body (2). The nitrogen inlet pipe (33) is connected to the output end of the closed-loop fan (31).

3. The closed-loop horizontal fluidized bed dryer according to claim 1, characterized in that: The exhaust assembly (4) includes an exhaust pipe (41), an air duct (42), and an exhaust fan (43). The exhaust pipe (41) passes through the top of the horizontal boiling dryer body (2), and the exhaust pipe (41) is connected to the exhaust fan (43) through the air duct (42).

4. The closed-loop horizontal fluidized bed dryer according to claim 1, characterized in that: The feeding assembly (6) includes a feeding hopper (61), a rotating rod (62), a crushing blade (63), and a handwheel (64). The feeding hopper (61) is connected to the main body (2) of the horizontal fluidized bed dryer. The rotating rod (62) is rotatably disposed inside the feeding hopper (61). The crushing blade (63) is installed on the rotating rod (62). One end of the rotating rod (62) extends out of the feeding hopper (61) and is connected to the handwheel (64).

5. The closed-loop horizontal fluidized bed dryer according to claim 2, characterized in that: The diversion pipes (35) are multiple and evenly distributed at the bottom of the horizontal boiling dryer body (2), and the air outlet of the diversion pipes (35) faces the bottom of the receiving mesh plate (5).

6. The closed-loop horizontal fluidized bed dryer according to claim 3, characterized in that: The exhaust pipe (41) is provided with multiple exhaust ports, and the air duct (42) is connected to the exhaust ports of the exhaust pipe (41).

7. The closed-loop horizontal fluidized bed dryer according to claim 4, characterized in that: The crushing blades (63) are in multiple groups and are spaced apart along the axial direction of the rotating rod (62). Each group of crushing blades (63) consists of multiple blades and is evenly distributed along the circumference of the rotating rod (62).

8. The closed-loop horizontal fluidized bed dryer according to claim 1, characterized in that: The striking ball (84) is made of elastic material, and the diameter of the striking ball (84) is larger than the mesh diameter of the receiving plate (5).

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