Coal feeding device for boiler of thermal power plant

Abstract

The utility model discloses a coal feeding device for boiler of thermal power plant relates to thermal power generation technical field. The utility model discloses a support frame, the upper surface of support frame is installed with conveyer, the outer wall symmetry of conveyer is installed with two support plate, and two support plate fixedly connected with hopper between, the outer wall of hopper is linked with feed hopper, and the upper surface of hopper is rotatably provided with beating apart subassembly, and beating apart subassembly includes the U -shaped plate of fixed on the upper surface of hopper and the bearing plate of fixed in the inner wall of hopper. The utility model discloses the mutual cooperation between each part of beating apart subassembly disperses the wet coal knot, avoids the wet coal knot and blocks the material mouth of conveyer and causes the equipment interruption in conveying, and the cooperation transmission assembly and secondary beating apart subassembly make the wet coal knot break up more evenly, make coal material fully mix with the air in boiler, and the combustion efficiency of boiler is greatly improved.

Description

Technical Field

[0001] This utility model belongs to the field of thermal power generation technology, and in particular relates to a coal feeding device for a thermal power plant boiler. Background Technology

[0002] In the thermal power generation process, the boiler, as the core energy conversion equipment, directly determines the power generation efficiency and unit safety through its stable and efficient operation. The coal feeding device, as the "fuel supply hub" of the boiler, needs to continuously and evenly transport raw coal to the boiler furnace.

[0003] Coal piles in thermal power plants are mostly open or semi-open, and rainwater directly falls on the surface of the coal pile during the rainy season. Moisture seeps into the coal through the gaps between the coal lumps, causing them to easily clump together. If these clumps are not broken up, they can easily clog the feed inlets of the equipment. Furthermore, because the clumps are of uneven size, they are difficult to mix thoroughly with air when they enter the boiler, leading to localized oxygen deficiency and incomplete combustion, resulting in increased coal consumption and decreased combustion efficiency. Therefore, we provide a coal feeding device for thermal power plant boilers. Utility Model Content

[0004] The purpose of this utility model is to provide a coal feeding device for a thermal power plant boiler, which solves the problems described in the background art.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: This utility model is a coal feeding device for a thermal power plant boiler, including a support frame; a conveyor is installed on the upper surface of the support frame, two support plates are symmetrically installed on the outer wall of the conveyor, a material cylinder is fixedly connected between the two support plates, a feed hopper is connected to the outer wall of the material cylinder, and a dispersing component is rotatably arranged on the upper surface of the material cylinder.

[0006] The present invention is further configured such that the dispersing component includes a U-shaped plate fixed on the upper surface of the material cylinder and a bearing plate fixed on the inner wall of the material cylinder. A motor is installed on the upper surface of the U-shaped plate, and a rotating shaft is fixedly connected to the output end of the motor. One end of the rotating shaft passes through the material cylinder and rotates on the upper surface of the bearing plate. A crushing paddle is fixedly connected to the outer wall of the rotating shaft. A secondary dispersing component is rotatably arranged inside the material cylinder, and a transmission component that works in conjunction with the secondary dispersing component is fixedly arranged on the outer wall of the rotating shaft.

[0007] The present invention is further configured such that the secondary dispersing component includes a connecting rod, both ends of which penetrate the material cylinder, two fixing blocks are symmetrically fixed to the outer wall of the support plate, and an L-shaped plate rotatably connected to the upper surface of each of the two fixing blocks is fixedly connected to the connecting rod, one end of the connecting rod penetrates one of the L-shaped plates, and multiple crushing paddles are fixedly connected to the outer wall of the connecting rod.

[0008] The present invention is further configured such that the transmission assembly includes a second transmission wheel and a first transmission wheel rotating on the upper surface of the material cylinder. The outer walls of the second transmission wheel and the first transmission wheel are fitted with transmission belts. The middle part of the first transmission wheel is fixedly connected to a second rotating shaft rotating on the upper surface of the fixed block. The outer wall of the second rotating shaft is fixedly connected to a first bevel gear. The end of the connecting rod is fixedly connected to a second bevel gear that meshes with the first bevel gear.

[0009] The present invention is further configured such that a fixing plate is fixedly connected to the outer wall of the conveyor, a scraper for use with the conveyor is fixedly connected to the outer wall of the fixing plate, and a collection box for use with the scraper is installed on the inner side of the support frame.

[0010] The present invention is further configured such that a discharge hopper is fixedly connected to the outer wall of the conveyor.

[0011] This utility model has the following beneficial effects:

[0012] This invention feeds coal into the cylinder from the feed hopper. The wet coal clumps are broken up by the cooperation of the various components of the dispersing assembly, which prevents the wet coal clumps from clogging the conveyor inlet and causing equipment conveying interruption. The transmission assembly and the secondary dispersing assembly further break up the wet coal clumps more evenly, allowing the coal to mix fully with the air in the boiler, which greatly improves the boiler's combustion efficiency. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a three-dimensional structural diagram of a coal feeding device for a thermal power plant boiler.

[0015] Figure 2 For the present utility model Figure 1 Schematic diagram of a partial structure.

[0016] Figure 3 This is a cross-sectional structural diagram of the disintegration component of this utility model.

[0017] Figure 4 For the present utility model Figure 1 A. Enlarged schematic diagram of a local structure.

[0018] The attached diagram lists the components represented by each number as follows:

[0019] 1. Support frame; 2. Conveyor; 3. Support plate; 4. Material cylinder; 5. U-shaped plate; 6. Feed hopper; 7. Motor; 8. Shaft 1; 9. Drive wheel 1; 10. Drive wheel 2; 11. Drive belt; 12. Shaft 2; 13. Fixing plate; 14. Scraper; 15. Collection box; 16. Crushing paddle 1; 17. Fixing block; 18. Bevel gear 1; 19. Bevel gear 2; 20. L-shaped plate; 21. Bearing plate; 22. Crushing paddle 2; 23. Connecting rod; 24. Discharge hopper. Detailed Implementation

[0020] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figures 1-4 This utility model is a coal feeding device for a thermal power plant boiler, including a support frame 1; a conveyor 2 is installed on the upper surface of the support frame 1, a discharge hopper 24 is fixedly connected to the outer wall of the conveyor 2, two support plates 3 are symmetrically installed on the outer wall of the conveyor 2, a material cylinder 4 is fixedly connected between the two support plates 3, a feed hopper 6 is connected to the outer wall of the material cylinder 4, and a dispersing component is rotatably arranged on the upper surface of the material cylinder 4.

[0022] The support frame 1 is the main body of the device. The conveyor 2 installed on the support frame 1 is used to transport coal to the boiler. The coal is fed into the cylinder 4 through the feed hopper 6. The wet coal clumps are broken up by the cooperation between the components of the dispersing component, so as to avoid the wet coal clumps blocking the feed port of the conveyor 2 and causing the conveying to be interrupted. The transmission component and the secondary dispersing component work together to break up the wet coal clumps more evenly, so that the coal can be fully mixed with the air in the boiler, which greatly improves the combustion efficiency of the boiler.

[0023] Please see Figures 1 to 3 The dispersing component includes a U-shaped plate 5 fixed on the upper surface of the material cylinder 4 and a bearing plate 21 fixed on the inner wall of the material cylinder 4. A motor 7 is installed on the upper surface of the U-shaped plate 5. A rotating shaft 8 is fixedly connected to the output end of the motor 7. One end of the rotating shaft 8 passes through the material cylinder 4 and rotates on the upper surface of the bearing plate 21. A crushing paddle 16 is fixedly connected to the outer wall of the rotating shaft 8. A secondary dispersing component is rotatably arranged inside the material cylinder 4. A transmission component that works in conjunction with the secondary dispersing component is fixedly arranged on the outer wall of the rotating shaft 8.

[0024] When the external power source is connected, the motor 7 is started. The rotation of the motor 7 drives the rotating shaft 8 to rotate synchronously. The crushing paddle 16 on the outer wall of the rotating shaft 8 rotates synchronously with the rotating shaft 8. When wet coal / lumpy coal enters the material cylinder 4 from the feed hopper 6, the high-speed rotating crushing paddle 16 contacts the coal block, tears apart the large coal block, completes the "primary coarse crushing", and initially disperses the coal.

[0025] Please see Figure 3 The secondary dispersing component includes a connecting rod 23, both ends of which pass through the material cylinder 4. Two fixing blocks 17 are symmetrically fixed to the outer wall of the support plate 3. The upper surfaces of the two fixing blocks 17 are fixedly connected to an L-shaped plate 20 that is rotatably connected to the connecting rod 23. One end of the connecting rod 23 passes through one of the L-shaped plates 20. Multiple crushing paddles 22 are fixedly connected to the outer wall of the connecting rod 23.

[0026] The transmission assembly drives the connecting rod 23 to rotate, and the crushing paddle 22 on the outer wall of the connecting rod 23 rotates with the shaft. The coal material that has been broken down once falls to the secondary breaking area, where the crushing paddle 22 further impacts the remaining small lumps to achieve "secondary fine crushing". This ensures that the coal material delivered to the boiler is more uniform and improves the boiler's combustion efficiency.

[0027] Please see Figures 3-4 The transmission assembly includes a second transmission wheel 10 and a first transmission wheel 9 that rotates on the upper surface of the material cylinder 4. The outer walls of the second transmission wheel 10 and the first transmission wheel 9 are fitted with a transmission belt 11. The middle part of the first transmission wheel 9 is fixedly connected to a second rotating shaft 12 that rotates on the upper surface of the fixed block 17. The outer wall of the second rotating shaft 12 is fixedly connected to a first bevel gear 18. The end of the connecting rod 23 is fixedly connected to a second bevel gear 19 that meshes with the first bevel gear 18.

[0028] The rotating shaft 8 drives the transmission wheel 10 on the outer wall to rotate; the transmission wheel 10 drives the adjacent transmission wheel 9 to rotate synchronously through the transmission belt 11; the transmission wheel 9 drives the rotating shaft 12 in the middle to rotate, and the bevel gear 18 on the outer wall of the rotating shaft 12 rotates accordingly. The bevel gear 18 meshes with the bevel gear 19 at the end of the connecting rod 23, converting the horizontal rotational power into vertical rotational power, and finally driving the connecting rod 23 to rotate, thereby realizing the synchronous transmission of the secondary disintegration assembly.

[0029] Please see Figure 1 and Figure 2 A fixing plate 13 is fixedly connected to the outer wall of the conveyor 2, and a scraper 14 for use with the conveyor 2 is fixedly connected to the outer wall of the fixing plate 13. A collection box 15 for use with the scraper 14 is installed on the inner side of the support frame 1.

[0030] The scraper 14 is fixed to the fixing plate 13 on the outer wall of the conveyor 2, and its edge is close to the surface of the conveyor belt of the conveyor 2. When the conveyor 2 is running, the scraper 14 can scrape off the residual coal dust adhering to the conveyor belt, so as to avoid the coal dust from accumulating with the conveyor belt and affecting the conveying efficiency. The coal dust scraped off by the scraper 14 falls directly into the collection box 15, realizing the recycling and reuse of coal, reducing waste and lowering costs.

[0031] The operation process of this embodiment is as follows: The support frame 1 is the main body of the device. The conveyor 2 installed on the support frame 1 is used to transport the coal material. The coal material is fed into the material cylinder 4 through the feed hopper 6. The motor 7 is started by connecting an external power source. The rotation of the motor 7 drives the rotating shaft 8 to rotate synchronously. The crushing paddle 16 on the outer wall of the rotating shaft 8 rotates synchronously with the rotating shaft 8. When wet coal / lumpy coal enters the material cylinder 4 from the feed hopper 6, the high-speed rotating crushing paddle 16 contacts the coal lumps, tears apart large coal lumps, and completes the "primary coarse crushing", initially dispersing the coal material. The rotating shaft 8 drives the transmission wheel 10 on the outer wall to rotate; the transmission wheel 10... 10 drives the adjacent drive wheel 9 to rotate synchronously via the drive belt 11; the drive wheel 9 drives the central shaft 12 to rotate, and the bevel gear 18 on the outer wall of the shaft 12 rotates accordingly. The bevel gear 18 meshes with the bevel gear 19 at the end of the connecting rod 23, converting the horizontal rotational power into vertical rotational power, which ultimately drives the connecting rod 23 to rotate. The crushing paddle 22 on the outer wall of the connecting rod 23 rotates with the shaft. The coal material that has been broken down once falls to the secondary breaking area. The crushing paddle 22 further impacts the remaining small lumps to achieve "secondary fine crushing", ensuring that the coal material is more uniform and improving the combustion efficiency of the boiler.

[0032] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0033] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A coal feeding device for a thermal power plant boiler, comprising a support frame (1); characterized in that, A conveyor (2) is mounted on the upper surface of the support frame (1). Two support plates (3) are symmetrically mounted on the outer wall of the conveyor (2). A material cylinder (4) is fixedly connected between the two support plates (3). A feed hopper (6) is connected to the outer wall of the material cylinder (4). A dispersing component is rotatably mounted on the upper surface of the material cylinder (4). The dispersing component includes a U-shaped plate (5) fixed on the upper surface of the material cylinder (4) and a bearing plate (21) fixed on the inner wall of the material cylinder (4). A motor (7) is mounted on the upper surface of the shaped plate (5). The output end of the motor (7) is fixedly connected to a rotating shaft (8). One end of the rotating shaft (8) passes through the material cylinder (4) and rotates on the upper surface of the bearing plate (21). A crushing paddle (16) is fixedly connected to the outer wall of the rotating shaft (8). A secondary dispersing assembly is rotatably arranged inside the material cylinder (4). A transmission assembly that works with the secondary dispersing assembly is fixedly arranged on the outer wall of the rotating shaft (8). The secondary dispersing assembly includes a connecting rod (23). Both ends of the connecting rod (23) pass through the material cylinder (4). Two fixing blocks (17) are symmetrically fixed to the outer wall of the support plate (3). The upper surfaces of the two fixing blocks (17) are fixedly connected to an L-shaped plate (20) that is rotatably connected to the connecting rod (23). One end of the connecting rod (23) passes through one of the L-shaped plates. The outer wall of the connecting rod (23) is fixedly connected to a plurality of crushing paddles (22). The transmission assembly includes a transmission wheel (10) and a transmission wheel (9) rotating on the upper surface of the material cylinder (4). The outer walls of the transmission wheel (10) and the transmission wheel (9) are fitted with a transmission belt (11). The middle part of the transmission wheel (9) is fixedly connected to a rotating shaft (12) rotating on the upper surface of the fixed block (17). The outer wall of the rotating shaft (12) is fixedly connected to a bevel gear (18). The end of the connecting rod (23) is fixedly connected to a bevel gear (19) meshing with the bevel gear (18).

2. The coal feeding device for a thermal power plant boiler according to claim 1, characterized in that, A fixing plate (13) is fixedly connected to the outer wall of the conveyor (2), and a scraper (14) that works with the conveyor (2) is fixedly connected to the outer wall of the fixing plate (13). A collection box (15) that works with the scraper (14) is installed on the inner side of the support frame (1).

3. The coal feeding device for a thermal power plant boiler according to claim 1, characterized in that, The outer wall of the conveyor (2) is fixedly connected to the discharge hopper (24).

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