RDF fuel rod raw material drying and dewatering device

Abstract

The application relates to the technical field of RDF fuel processing, and discloses a RDF fuel rod raw material drying and dewatering device, which comprises a drying box, the inside of the drying box is provided with a filter cartridge, the inner wall of the filter cartridge is fixedly connected with a plurality of spiral conveying belts and a plurality of poking plates, the plurality of spiral conveying belts and the plurality of poking plates are uniformly arranged in an equidistant circumferential array, and the plurality of poking plates penetrate through the plurality of spiral conveying belts.In the utility model, through the cooperation of the filter cartridge, the spiral conveying belts on the inner wall and the poking plate structure, the spiral conveying belts can drive the raw material to continuously move along the axial direction, the poking plate can continuously turn and scatter the raw material, the problems that the raw material is accumulated in the drying box and the hot air is difficult to penetrate the inside in the prior art are avoided, the raw material is always in a dispersed state and fully contacts with the hot air, the consistency of the moisture content of the raw material at different positions is guaranteed, and powerful guarantee is provided for the subsequent fuel rod forming quality.

Description

Technical Field

[0001] This application relates to the field of RDF fuel processing technology, and in particular to an apparatus for drying and dehydrating RDF fuel rod raw materials. Background Technology

[0002] RDF fuel rods are solid fuels produced from municipal solid waste through processes such as sorting, crushing, drying, and molding. They offer advantages such as stable calorific value, high combustion efficiency, and low pollutant emissions, and are widely used in industrial boilers, power generation, and other fields. In the processing of RDF fuel rods, the drying and dehydration of the raw materials (such as sorted and crushed waste particles) is one of the key steps, as the moisture content of the raw materials directly affects the subsequent molding quality and the combustion performance of the fuel rods.

[0003] In existing technologies, drying devices for RDF fuel rod raw materials mostly employ traditional hot air drying ovens, which dry the raw materials by introducing hot air into the drying oven. However, this type of device has the following drawbacks: First, the raw materials tend to accumulate in the drying oven, making it difficult for hot air to penetrate the accumulated raw materials, resulting in uneven drying and excessively high moisture content in some raw materials. Second, the distribution of hot air within the drying oven is uneven, with excessively high temperatures near the air inlet and insufficient temperatures in areas far from the air inlet, further exacerbating the problem of uneven drying. Therefore, an RDF fuel rod raw material drying and dehydration device is proposed to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide an RDF fuel rod raw material drying and dehydration device to solve the problems mentioned in the background art.

[0005] The RDF fuel rod raw material drying and dehydration device provided in this application adopts the following technical solution:

[0006] A drying and dehydration device for RDF fuel rod raw materials includes a drying box, inside which a filter cylinder is installed. Multiple spiral conveyor belts and material-pulling plates are fixedly connected to the inner wall of the filter cylinder. The multiple spiral conveyor belts and multiple material-pulling plates are evenly arranged in a circumferential array with equal spacing, and the multiple material-pulling plates pass through the multiple spiral conveyor belts.

[0007] The drying chamber is equipped with a drying assembly, which includes an industrial hot air blower, a ring-shaped main pipe, and multiple branch pipes. The multiple branch pipes are fixedly connected to the inner walls of the drying chamber, and several nozzles are evenly spaced on the outer wall of the filter cartridge. The ring-shaped main pipe is fixedly connected to the outer wall of one side of the drying chamber by a fastener. One end of the multiple branch pipes passes through the drying chamber and is connected to the ring-shaped main pipe. The industrial hot air blower is fixedly installed on the top outer wall of the drying chamber, and its air supply end is connected to the ring-shaped main pipe through an air supply pipe.

[0008] Preferably, the inner wall of the drying chamber is equipped with a rolling assembly for driving the filter cartridge to rotate. The rolling assembly includes multiple rollers and a servo motor. The multiple rollers are rotatably connected to the inner walls of the drying chamber, and the two ends of the filter cartridge are rotatably connected to the outer walls of the multiple rollers.

[0009] Preferably, the two servo motors are fixedly installed on the top inner wall of the drying oven and arranged parallel to each other, with the ends of their output shafts fixedly connected to the shafts of two of the rollers.

[0010] Preferably, the top outer wall of the drying oven is provided with multiple exhaust holes, and the multiple exhaust holes are connected to the inner cavity of the drying oven.

[0011] Preferably, the bottom outer wall of the drying box is fixedly connected with multiple support legs, and the multiple support legs are evenly distributed at the four corner edges of the drying box.

[0012] Preferably, the drying box has a feed inlet at one end and a discharge outlet at the other end, and both the feed inlet and the discharge outlet are hinged with a door.

[0013] In summary, this application includes the following beneficial technical effects:

[0014] 1. Through the rotation of the filter cartridge and the spiral conveyor belt and pusher plate structure on its inner wall, the spiral conveyor belt can drive the raw material to move continuously along the axial direction, and the pusher plate can continuously turn and disperse the raw material, avoiding the problems of raw material accumulation in the drying box and the inability of hot air to penetrate the interior in the existing technology. This ensures that the raw material is always in a dispersed state and in full contact with the hot air, ensuring the consistency of the moisture content of the raw material in different positions, and providing a strong guarantee for the subsequent fuel rod molding quality.

[0015] 2. The drying assembly adopts a combination design of ring main pipe diversion, multi-branch pipe air distribution and precise nozzle spray. The ring main pipe can evenly distribute the hot air delivered by the industrial hot air blower to each branch pipe. The multiple branches are evenly distributed along the circumference of the drying chamber and the nozzles are facing the filter cartridge axis. This solves the problems of uneven distribution of hot air in the drying chamber and local overheating or underheating in the existing technology. It enables the hot air to fully and evenly cover all raw materials, improves drying efficiency and dehydration effect, and ensures that the fuel rod has stable combustion performance. Attached Figure Description

[0016] Figure 1 This is an overall schematic diagram of an embodiment of the application;

[0017] Figure 2 This is an internal schematic diagram of an embodiment of the application;

[0018] Figure 3 for Figure 2 Enlarged schematic diagram of the structure at point A in the middle;

[0019] Figure 4 This is a partial cross-sectional view of the filter cartridge in the embodiment of the application.

[0020] Explanation of reference numerals in the attached drawings: 1. Drying oven; 2. Filter cartridge; 3. Spiral conveyor belt; 4. Feeding plate; 5. Roller; 6. Servo motor; 7. Branch pipe; 8. Nozzle; 9. Fixing component; 10. Annular main pipe; 11. Industrial hot air blower; 12. Air supply pipe; 13. Support leg; 14. Exhaust port. Detailed Implementation

[0021] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0022] This application discloses an apparatus for drying and dehydrating RDF fuel rod raw materials. (Refer to...) Figure 1-4 A drying and dehydration device for RDF fuel rod raw materials includes a drying chamber 1, a filter cartridge 2, a spiral conveyor belt 3, a feeding plate 4, a rolling assembly, a drying assembly, support legs 13, and a chamber door. The specific structure and connection relationship of each component are as follows:

[0023] The drying oven 1, serving as the main supporting structure of the device, is a hollow cuboid or cylindrical structure, providing installation space for internal components and creating a sealed drying environment. Multiple support legs 13 are fixedly connected to the bottom outer wall of the drying oven 1. These support legs 13 are evenly distributed at the four corners of the drying oven 1 and are made of rigid material to stably support the entire device on the ground, preventing positional shifts due to vibration during the drying process. The drying oven 1 has a feed inlet at one end and a discharge outlet at the other. Both the feed inlet and discharge outlet are hinged to doors, and sealing gaskets are installed at the mating surfaces of the doors with the feed inlet and discharge outlet, ensuring a sealed interior when the doors are closed.

[0024] The drying chamber 1 is equipped with a filter cylinder 2, which has a cylindrical mesh structure. The filter cylinder 2 is made of high-temperature and corrosion-resistant metal mesh, which can both support the raw materials and allow the moisture and excess hot air generated during the drying process to pass through the filter, thus improving the uniformity of drying. Multiple spiral conveyor belts 3 and multiple deflector plates 4 are fixedly connected to the inner wall of the filter cylinder 2. The multiple spiral conveyor belts 3 and multiple deflector plates 4 are evenly arranged in a circumferential array with equal spacing, and the multiple deflector plates 4 pass through the multiple spiral conveyor belts 3. The spiral conveyor belts 3 extend along the axial direction of the filter cylinder 2. Their spiral structure can drive the raw materials to move along the axial direction when the filter cylinder 2 rotates, so as to achieve continuous material feeding. The deflector plates 4 are set perpendicular to the surface of the spiral conveyor belts 3. They can turn and disperse the raw materials during the rotation of the filter cylinder 2, so as to prevent the raw materials from agglomerating and accumulating, and ensure that the raw materials are in full contact with the hot air.

[0025] A rolling assembly for driving the filter cartridge 2 to rotate is installed on the inner wall of the drying chamber 1. This rolling assembly includes multiple rollers 5 and servo motors 6. The multiple rollers 5 are rotatably connected to the inner walls of the drying chamber 1 via bearing seats, specifically distributed on the outer sides of both ends of the filter cartridge 2. The outer walls of both ends of the filter cartridge 2 roll in contact with the outer walls of the multiple rollers 5. While providing stable support for the filter cartridge 2, the rollers 5 also drive the filter cartridge 2 to rotate through friction. Two servo motors 6 are fixedly installed on the top inner wall of the drying chamber 1, and the two servo motors 6 are arranged parallel to each other. The output shaft of the servo motor 6 is fixedly connected to the shaft of two of the rollers 5 via a coupling. When the servo motor 6 is working, it drives the corresponding roller 5 to rotate, thereby driving the filter cartridge 2 to rotate at a uniform speed through the friction between the roller 5 and the filter cartridge 2.

[0026] The drying chamber 1 is equipped with a drying assembly, which includes an industrial hot air blower 11, a ring main pipe 10, and multiple branch pipes 7. This assembly is the core component for the device to achieve drying and dehydration. The multiple branch pipes 7 are fixedly connected to the inner walls of the drying chamber 1 by brackets. The branch pipes 7 extend along the axial direction of the drying chamber 1 and are evenly distributed along the circumference of the drying chamber 1. Several nozzles 8 are evenly distributed on the outer wall of the filter cartridge 2 facing the branch pipes 7. The nozzles 8 are inclined and spray in the axial direction of the filter cartridge 2, so that the hot air can be accurately sprayed onto the raw material inside the filter cartridge 2. The ring main pipe 10 is fixedly connected to the outer wall of the drying chamber 1 by fasteners 9. The fasteners 9 are fixed to the outer wall of the drying chamber 1 with bolts to ensure the installation stability of the ring main pipe 10. One end of the multiple branch pipes 7 penetrates the side wall of the drying chamber 1 and is connected to the ring main pipe 10 to form a unified hot air delivery channel. The industrial hot air blower 11 is fixedly installed on the top outer wall of the drying chamber 1 by a mounting base. The air supply end of the industrial hot air blower 11 is connected to the annular main pipe 10 through the air supply pipe 12. The air supply pipe 12 is made of high temperature resistant flexible hose, and its two ends are respectively connected to the air supply end of the industrial hot air blower 11 and the annular main pipe 10 by pipe clamps to prevent hot air leakage.

[0027] The top outer wall of the drying oven 1 is provided with multiple exhaust holes 14, all of which are connected to the inner cavity of the drying oven 1. The exhaust holes 14 are designed to discharge the moisture and excess hot air generated during the drying process in a timely manner, maintain the air pressure balance inside the drying oven 1, and prevent moisture accumulation from affecting the drying effect. Dust filters can be selectively installed inside the exhaust holes 14 to prevent dust generated during the drying process from leaking out with the airflow, thereby improving the environmental friendliness of the device. It should be noted that a drain outlet can be provided at the bottom of the drying oven 1, which is not shown in the figure, to ensure that the wastewater and dust deposited at the bottom of the drying oven 1 can be discharged in a timely manner.

[0028] The implementation principle of the RDF fuel rod raw material drying and dehydration device in this application embodiment is as follows: Preparation stage: Check the connection status of each component of the device, ensure that the box door is closed and sealed, start the industrial hot air blower 11 for preheating, and at the same time start the servo motor 6, which drives the filter cartridge 2 to rotate at a preset speed through the roller 5.

[0029] Feeding stage: After the internal temperature of the drying chamber 1 reaches the preset drying temperature, open the door at the feed inlet and pour the RDF fuel rod raw material to be dried into the filter cartridge 2 from the feed inlet. After pouring, close the feed inlet door to ensure that the drying chamber 1 is sealed.

[0030] Drying and dehydration stage: During the rotation of the filter cylinder 2, the spiral conveyor belt 3 on its inner wall drives the raw material to move slowly along the axis of the filter cylinder 2. At the same time, the material feeding plate 4 continuously turns and disperses the raw material, so that the raw material is evenly distributed in the filter cylinder 2. The hot air generated by the industrial hot air blower 11 is distributed to each branch pipe 7 through the air supply pipe 12 and the annular main pipe 10, and then precisely sprayed onto the surface of the raw material in the filter cylinder 2 through the nozzle 8. The hot air fully contacts the raw material and absorbs the moisture in the raw material to achieve drying and dehydration. The moisture and excess hot air generated during the drying process pass through the mesh structure of the filter cylinder 2 and are discharged through the exhaust hole 14 at the top of the drying box 1.

[0031] Discharge stage: When the raw material moves to the discharge port position in the filter cylinder 2 with the spiral conveyor belt 3, the box door at the discharge port is opened, and the dried raw material is discharged from the discharge port under the drive of the spiral conveyor belt 3, completing one drying and dehydration operation.

[0032] Shutdown phase: After all raw materials have been discharged, turn off the industrial hot air blower 11 and servo motor 6, clean the residual dust inside the device, close the door, and complete the entire workflow.

[0033] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.

[0034] Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0035] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A drying and dehydration apparatus for RDF fuel rod raw materials, comprising a drying chamber (1), characterized in that: The drying box (1) is equipped with a filter cylinder (2). The inner wall of the filter cylinder (2) is fixedly connected with multiple spiral conveyor belts (3) and multiple material-pulling plates (4). The multiple spiral conveyor belts (3) and multiple material-pulling plates (4) are evenly arranged in a circular array with equal spacing, and the multiple material-pulling plates (4) pass through the multiple spiral conveyor belts (3). The drying chamber (1) is equipped with a drying assembly, which includes an industrial hot air blower (11), a ring main pipe (10) and multiple branch pipes (7). The multiple branch pipes (7) are fixedly connected to the inner walls of the drying chamber (1) and have several nozzles (8) evenly spaced towards the outer wall of the filter cartridge (2). The ring main pipe (10) is fixedly connected to the outer wall of the drying chamber (1) on one side by a fastener (9). One end of the multiple branch pipes (7) passes through the drying chamber (1) and is connected to the ring main pipe (10). The industrial hot air blower (11) is fixedly installed on the top outer wall of the drying chamber (1) and its air supply end is connected to the ring main pipe (10) through an air supply pipe (12).

2. The RDF fuel rod raw material drying and dehydration device according to claim 1, characterized in that: The inner wall of the drying box (1) is equipped with a rolling assembly that drives the filter cartridge (2) to rotate. The rolling assembly includes multiple rollers (5) and a servo motor (6). The multiple rollers (5) are rotatably connected to the inner wall of the drying box (1), and the two ends of the filter cartridge (2) are rotatably connected to the outer wall of the multiple rollers (5).

3. The RDF fuel rod raw material drying and dehydration device according to claim 2, characterized in that: The two servo motors (6) are fixedly installed on the top inner wall of the drying box (1) and are arranged parallel to each other. The ends of their output shafts are fixedly connected to the shafts of two rollers (5).

4. The RDF fuel rod raw material drying and dehydration device according to claim 1, characterized in that: The top outer wall of the drying box (1) is provided with a plurality of exhaust holes (14), and the plurality of exhaust holes (14) are connected to the inner cavity of the drying box (1).

5. The RDF fuel rod raw material drying and dehydration device according to claim 1, characterized in that: The bottom outer wall of the drying box (1) is fixedly connected with multiple support legs (13), and the multiple support legs (13) are evenly distributed at the four corner edges of the drying box (1).

6. The RDF fuel rod raw material drying and dehydration device according to claim 1, characterized in that: The drying box (1) has a feed inlet at one end and a discharge outlet at the other end, and both the feed inlet and the discharge outlet are hinged with a box door.

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