Boiler feeding device

Abstract

The utility model relates to the technical field of boiler feeding devices, and provides a boiler feeding device which comprises a coal storage hopper and an auger conveying mechanism used for conveying coal in the coal storage hopper to a boiler, an anti-blocking mechanism is arranged in the coal storage hopper, and the anti-blocking mechanism comprises a first anti-blocking structure and a second anti-blocking structure. The first anti-blocking structure comprises a first rotating shaft, a first anti-blocking assembly and a first driving motor used for driving the first rotating shaft to rotate, the first anti-blocking assembly comprises a plurality of first blades, the first blades are circumferentially and uniformly distributed around the first rotating shaft, and the first rotating shaft is rotationally connected into the coal storage hopper. The problem that untreated coal is prone to blocking the feeding device in the feeding process of the feeding device in the prior art is solved, and the feeding efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of boiler feeding devices, specifically, to a boiler feeding device. Background Technology

[0002] Boiler feeding devices are generally key equipment in boiler systems, responsible for feeding fuel or water into the boiler to ensure its operation.

[0003] Currently, as a common boiler feeding device, the auger coal feeder mainly consists of a coal storage hopper and an auger conveying mechanism. Due to gravity and the structure of the hopper, the coal fuel in the coal storage hopper will gradually enter the auger conveying mechanism and be sent to the boiler for combustion.

[0004] However, during use, it has been found that the flowability of coal in the coal storage hopper is easily affected by its moisture content and the amount of coal dust. Specifically: the presence of moisture causes a water film to easily form on the surface of coal particles, increasing the adhesion between particles and reducing flowability; the fine coal dust particles have a large specific surface area and strong inter-particle friction, hindering flow; coal dust particles tend to accumulate, forming a stable structure that increases flow resistance. This can lead to blockages in the coal feeding device. Therefore, to ensure the feeding efficiency of the boiler feeding device, pretreatment such as drying and dehydration of the fuel is usually required, which extends the total feeding time and indirectly affects the boiler combustion efficiency. Utility Model Content

[0005] This utility model proposes a boiler feeding device that solves the problem of untreated coal easily clogging the feeding device during the feeding process in related technologies, thereby improving feeding efficiency.

[0006] The technical solution of this utility model is as follows:

[0007] A boiler feeding device includes a coal storage hopper and an auger conveying mechanism for feeding coal from the coal storage hopper to the boiler. The coal storage hopper is provided with an anti-blocking mechanism, which includes a first anti-blocking structure. The first anti-blocking structure includes a first rotating shaft, a first anti-blocking component, and a first drive motor for driving the first rotating shaft to rotate. The first anti-blocking component includes a plurality of first blades, each of which is evenly distributed circumferentially around the first rotating shaft. The first rotating shaft is rotatably connected to the coal storage hopper.

[0008] Furthermore, the coal storage hopper includes a hopper body and a connecting pipe for supplying coal in the hopper body into the auger conveying mechanism. The anti-blocking mechanism also includes a second anti-blocking structure, which is located in the connecting pipe, and the first anti-blocking structure is located in the hopper body.

[0009] Furthermore, the second anti-blocking structure includes a second rotating shaft, a second anti-blocking component, and a second drive motor for driving the second rotating shaft to rotate. The second anti-blocking component includes a plurality of second blades, each of which is evenly distributed around the second rotating shaft in a circular pattern. The second rotating shaft is rotatably connected to the connecting pipe.

[0010] Furthermore, the first anti-blocking component is provided in a plurality of manners, each of the first anti-blocking components being arranged sequentially along the axial direction of the first rotation axis, and each of the first blades in adjacent first anti-blocking components being staggered on the first rotation axis; the second anti-blocking component is provided in a plurality of manners, each of the second anti-blocking components being arranged sequentially along the axial direction of the second rotation axis, and each of the second blades in adjacent second anti-blocking components being staggered on the second rotation axis.

[0011] Furthermore, the adjacent first and second blades are staggered.

[0012] Furthermore, the auger conveying mechanism includes an auger conveying shaft, and the auger conveying shaft, the first rotating shaft, and the second rotating shaft are interconnected.

[0013] Furthermore, a first linkage belt and a second linkage belt are respectively provided between the auger conveyor shaft and the second rotating shaft, and between the first rotating shaft and the second rotating shaft.

[0014] Furthermore, both the first and second linkage belts are synchronous belts.

[0015] The working principle and beneficial effects of this utility model are as follows:

[0016] The coal storage hopper of this utility model is equipped with an anti-blocking mechanism. The anti-blocking mechanism mainly includes a first anti-blocking structure, which includes a first rotating shaft, a first anti-blocking component, and a first drive motor for driving the first rotating shaft to rotate. The first anti-blocking component includes several first blades, each of which is evenly distributed around the first rotating shaft and is fixedly connected to the first rotating shaft. The first rotating shaft is rotatably connected to the coal storage hopper. That is, by driving the first rotating shaft through the first drive motor, each first blade stirs and disperses the coal in the coal storage hopper. In this way, even if the coal moisture and powder content are too high, it is difficult to form a stable structure in the coal storage hopper and block the coal conveying channel, effectively ensuring the feeding efficiency of the feeding device.

[0017] Furthermore, since coal with excessive moisture and powder content cannot clog this utility model, when using this utility model as boiler feed, the coal pretreatment process can be eliminated when it is not necessary, thereby indirectly speeding up the coal replenishment process and ensuring boiler combustion efficiency. Attached Figure Description

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0019] Figure 1 This is a schematic diagram of the structure of Example 1;

[0020] Figure 2 for Figure 1 Internal structure diagram;

[0021] Figure 3 This is a schematic diagram of the structure of Example 2;

[0022] Figure 4 This is a schematic diagram showing the cooperation between the first anti-blocking structure and the second anti-blocking structure in Embodiment 1 or Embodiment 2 when no drive motor is provided.

[0023] In the picture:

[0024] 1. Coal storage hopper; 11. Hopper body; 12. Connecting pipe; 2. Screw conveyor mechanism; 21. Screw conveyor shaft; 3. Anti-blocking mechanism; 31. First anti-blocking structure; 311. First rotating shaft; 312. First anti-blocking component; 3121. First blade; 313. First drive motor; 32. Second anti-blocking structure; 321. Second rotating shaft; 322. Second anti-blocking component; 3221. Second blade; 323. Second drive motor; 4. First linkage belt; 5. Second linkage belt. Detailed Implementation

[0025] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0026] Example 1

[0027] like Figures 1-2 As shown, this embodiment proposes a boiler feeding device, which mainly includes a coal storage hopper 1 and an auger conveying mechanism 2 for conveying coal in the coal storage hopper 1 to the boiler. The auger conveying mechanism 2 mainly includes an auger conveying shaft 21, a conveying pipe, and an auger drive component. Preferably, the boiler feeding work is completed by setting the outlet of the conveying pipe in the boiler.

[0028] The coal storage hopper 1 is equipped with an anti-blocking mechanism 3, which includes a first anti-blocking structure 31. The first anti-blocking structure 31 includes a first rotating shaft 311, a first anti-blocking component 312, and a first drive motor 313 for driving the first rotating shaft 311 to rotate. The first anti-blocking component 312 includes a plurality of first blades 3121, each of which is evenly distributed around the first rotating shaft 311 and is fixedly connected to the first rotating shaft 311. The first rotating shaft 311 is rotatably connected to the coal storage hopper 1. That is, when the first drive motor 313 drives the first rotating shaft 311 to rotate in the coal storage hopper 1, it will drive each of the first blades 3121 to rotate together, thereby pushing the coal in the coal storage hopper 1 to move, so that the coal is in a moving state, effectively preventing its deposition and accumulation, thereby avoiding the blockage of the coal storage hopper 1. Thus, even if the coal moisture content and powder content are too high, it is difficult to form a stable structure in the coal storage hopper 1 and block the coal conveying channel in this embodiment, effectively ensuring the feeding efficiency of this embodiment.

[0029] Furthermore, since coal with excessive moisture and powder content cannot clog this embodiment, when using this embodiment as boiler feed, the coal pretreatment process can be reduced when it is not necessary, thereby indirectly speeding up the coal replenishment process and ensuring boiler combustion efficiency.

[0030] The coal storage hopper 1 includes a hopper body 11 and a connecting pipe 12 for supplying coal in the hopper body 11 into the screw conveyor mechanism 2. The anti-blocking mechanism 3 also includes a second anti-blocking structure 32, which is located in the connecting pipe 12, while the first anti-blocking structure 31 is located in the hopper body 11. That is, the first anti-blocking structure 31 and the second anti-blocking structure 32 respectively play an anti-blocking role for the hopper body 11 and the connecting pipe 12, effectively avoiding the existence of anti-blocking dead angles in the flow path of coal in the coal storage hopper 1, thereby ensuring the anti-blocking effect of this embodiment.

[0031] Specifically, the second anti-blocking structure 32 in this embodiment mainly includes a second rotating shaft 321, a second anti-blocking component 322, and a second drive motor 323 for driving the second rotating shaft 321 to rotate. The second anti-blocking component 322 includes a plurality of second blades 3221, each of which is evenly distributed around the second rotating shaft 321 and is integrally formed with the second rotating shaft 321. The second rotating shaft 321 is rotatably connected to the connecting pipe 12. That is, the second anti-blocking structure 32 has the same structure and working principle as the first anti-blocking structure 31, only the specific structural dimensions and specifications are different depending on the position of the structure.

[0032] In this embodiment, the first drive motor 313 and the second drive motor 323 are preferably hydraulic motors or other motors with high output force to ensure that the first rotating shaft 311 and the second rotating shaft 321 can overcome the resistance generated by the coal in the coal storage hopper 1 and rotate, thus ensuring the stability of the operation of this embodiment.

[0033] Preferably, the positions where the conveying pipe, the coal storage hopper 1 and each driving component (drive motor) meet should be provided with motor mounts to fix the driving components. Specifically, the method by which the driving components are fixed on the motor mounts should be determined according to the actual model of the driving components used, which will not be elaborated in this embodiment.

[0034] like Figure 2 , Figure 4 As shown, in this embodiment, there are several first anti-blocking components 312, which are arranged sequentially along the axial direction of the first rotating shaft 311. The first blades 3121 of adjacent first anti-blocking components 312 are staggered on the first rotating shaft 311. There are several second anti-blocking components 322, which are arranged sequentially along the axial direction of the second rotating shaft 321. The second blades 3221 of adjacent second anti-blocking components 322 are staggered on the second rotating shaft 321. That is, the staggered blades on each rotating shaft can drive the coal at different positions to move (stir) at different angles during the rotation of each rotating shaft, avoiding the periodic movement (stirring) of coal in the same position. This ensures that the first anti-blocking structure 31 and the second anti-blocking structure 32 can more effectively stir the coal at the bottom and side wall of the coal storage hopper 1, and improve the performance of preventing agglomeration and blockage.

[0035] The adjacent first blade 3121 and second blade 3221 are staggered, that is, the blades on the first rotating shaft 311 and the blades on the second rotating shaft 321 are also staggered. This further helps the anti-blocking mechanism 3 to break up the uneven coal area inside the coal storage hopper 1, ensuring that each coal particle can move under the action of the anti-blocking mechanism 3, avoiding the situation of local stagnation of coal flow inside the coal storage hopper 1, and further improving the performance of preventing agglomeration and blockage.

[0036] Example 2

[0037] Based on Example 1, such as Figure 3 As shown, this embodiment proposes that the auger conveyor shaft 21, the first rotating shaft 311, and the second rotating shaft 321 are linked together, that is, only one driving component (motor) is needed to drive the anti-blocking mechanism 3 and the auger conveyor mechanism 2 to work. Compared with embodiment 1, this embodiment can reduce the number of failure points by reducing the number of motors, thereby improving the overall structural reliability of this embodiment. Moreover, a single motor usually has lower total energy consumption than multiple motors, especially under load balancing conditions, where energy consumption is higher.

[0038] Specifically, in this embodiment, the auger conveyor shaft 21 and the second rotating shaft 321, and the first rotating shaft 311 and the second rotating shaft 321 are respectively provided with a first linkage belt 4 and a second linkage belt 5. Correspondingly, the auger conveyor shaft 21, the second rotating shaft 321, and the first rotating shaft 311 should all be provided with pulley structures so that the auger conveyor shaft 21, the second rotating shaft 321, and the first rotating shaft 311 can be linked by belt drive. Because belt drive can adapt to a large shaft distance and is suitable for long-distance transmission, at the same time, the transmission belt can adapt to a certain degree of axial tilt and misalignment in order to ensure the stability of operation of this embodiment.

[0039] Furthermore, in order to further improve the stability of operation in this embodiment, both the first linkage belt 4 and the second linkage belt 5 in this embodiment are synchronous belts.

[0040] Preferably, in this embodiment, the auger conveyor shaft 21, the second rotating shaft 321, and the first rotating shaft 311 are still equipped with driving components. That is, this embodiment has a redundant design for the driving components. In this way, if any one of the driving components fails, the other driving components can be started to maintain the normal operation of this embodiment.

[0041] Therefore, unlike Embodiment 1, each drive component (drive motor) in this embodiment is preferably a permanent magnet synchronous motor or the like, whose output shaft can rotate under external force without damaging its internal structure when not started, thus ensuring the service life of each drive component in this embodiment.

[0042] The above are merely preferred embodiments of the present utility model and are 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 shall be included within the protection scope of the present utility model.

Claims

1. A boiler feeding device comprising a coal storage hopper (1) and an auger conveying mechanism (2) for feeding coal in the coal storage hopper (1) to a boiler, characterized in that, The coal storage hopper (1) is provided with an anti-blocking mechanism (3). The anti-blocking mechanism (3) includes a first anti-blocking structure (31). The first anti-blocking structure (31) includes a first rotating shaft (311), a first anti-blocking component (312), and a first drive motor (313) for driving the first rotating shaft (311) to rotate. The first anti-blocking component (312) includes a plurality of first blades (3121). Each first blade (3121) is evenly distributed around the first rotating shaft (311). The first rotating shaft (311) is rotatably connected to the coal storage hopper (1).

2. A boiler feeding device according to claim 1, characterized in that The coal storage hopper (1) includes a hopper body (11) and a connecting pipe (12) for supplying coal in the hopper body (11) into the screw conveyor mechanism (2). The anti-blocking mechanism (3) further includes a second anti-blocking structure (32), which is located in the connecting pipe (12), and the first anti-blocking structure (31) is located in the hopper body (11).

3. A boiler feeding device according to claim 2, characterized in that The second anti-blocking structure (32) includes a second rotating shaft (321), a second anti-blocking component (322), and a second drive motor (323) for driving the second rotating shaft (321) to rotate. The second anti-blocking component (322) includes a plurality of second blades (3221), each of the second blades (3221) being evenly distributed around the second rotating shaft (321). The second rotating shaft (321) is rotatably connected to the connecting pipe (12).

4. A boiler feeding device according to claim 3, characterized in that The first anti-blocking component (312) is provided in a plurality of them, and each first anti-blocking component (312) is arranged sequentially along the axial direction of the first rotating shaft (311). The first blades (3121) in adjacent first anti-blocking components (312) are staggered and distributed on the first rotating shaft (311). The second anti-blocking component (322) is provided in a plurality of them, and each second anti-blocking component (322) is arranged sequentially along the axial direction of the second rotating shaft (321). The second blades (3221) of adjacent second anti-blocking components (322) are staggered on the second rotating shaft (321).

5. A boiler feeding device according to claim 3 or 4, characterized in that The first blade (3121) and the second blade (3221) are staggered.

6. A boiler feeding device according to claim 5, characterized in that The auger conveying mechanism (2) includes an auger conveying shaft (21), and the auger conveying shaft (21), the first rotating shaft (311), and the second rotating shaft (321) are linked together.

7. A boiler feeding device according to claim 6, characterized in that The auger conveyor shaft (21) and the second rotating shaft (321), and the first rotating shaft (311) and the second rotating shaft (321) are respectively provided with a first linkage belt (4) and a second linkage belt (5).

8. A boiler feeding device according to claim 7, characterized in that Both the first linkage belt (4) and the second linkage belt (5) are synchronous belts.

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