A coal blending device for boiler co-firing

Abstract

This utility model provides a coal blending device for boiler co-firing, aiming to solve the technical problems of complex operation processes, long blending times, and reduced production efficiency associated with coal blending equipment. The coal blending device includes: a first conveyor belt; a second conveyor belt, one end of which is close to one end of the first conveyor belt; a third conveyor belt located below the ends of the first and second conveyor belts that are close to each other; a first stirring component positioned above the third conveyor belt; and a second stirring component positioned above the third conveyor belt and downstream of the first stirring component. The first and second conveyor belts transport the main coal and blended coal, ensuring both fall onto the third conveyor belt. The first and second stirring components on the third conveyor belt then thoroughly mix the main coal and blended coal. This coal blending device can mix the main coal and blended coal during the transport process, thereby shortening the blending time and improving production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of thermal power technology, and specifically to a coal blending device for boiler co-firing. Background Technology

[0002] Coal blending is one of the important ways to solve the problem of tight fuel supply and complex and varied coal types in my country's coal-fired power plant boilers, and to improve the safety, economy and environmental protection of unit operation.

[0003] In the process of blended coal combustion, the coal blending device is mainly used for mixing the main coal and the blended coal. The coal blending device used in industry is mainly a traditional stirring device. During the coal blending process, the main coal and the blended coal need to be put into a container and taken out after a certain stirring time.

[0004] The equipment used for coal mixing currently has a complex operating process, and each mixing process takes a relatively long time, which affects production efficiency. Utility Model Content

[0005] To address the technical problems of complex equipment operation procedures, long mixing time, and reduced production efficiency in coal blending, this utility model provides a coal blending device for boiler co-firing. By mixing the main coal and the blended coal during the transmission process, the mixing time is shortened and the production efficiency is improved.

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

[0007] A coal blending device for boiler co-firing includes:

[0008] First conveyor belt;

[0009] The second conveyor belt has one end close to one end of the first conveyor belt;

[0010] The third conveyor belt is located below the ends of the first and second conveyor belts that are close to each other;

[0011] The first stirring assembly is located above the third conveyor belt;

[0012] The second stirring assembly is located above the third conveyor belt and downstream of the first stirring assembly.

[0013] Optionally, the unit conveying capacity of the third conveyor belt is greater than the sum of the unit conveying capacity of the first conveyor belt and the unit conveying capacity of the second conveyor belt.

[0014] Optionally, the first stirring assembly includes:

[0015] Two horizontal shafts are arranged parallel to each other and located above the third conveyor belt, with the two horizontal shafts arranged along the conveying direction of the third conveyor belt.

[0016] A paddle plate is disposed on the horizontal axis;

[0017] The first motor has its output shaft poweredly connected to the two horizontal shafts;

[0018] Each of the two horizontal axes is provided with a plurality of the paddle plates.

[0019] Optionally, the two horizontal axes rotate in opposite directions.

[0020] Optionally, the two horizontal shafts are poweredly connected by two meshing first gears.

[0021] Optionally, the paddle plates on the two horizontal axes are staggered.

[0022] Optionally, the projections of the paddle plates on the two horizontal axes onto a plane perpendicular to the horizontal axis are staggered.

[0023] Optionally, the second stirring assembly includes:

[0024] Multiple longitudinal shafts are arranged above the third conveyor belt in a direction perpendicular to the third conveyor belt;

[0025] Multiple spiral plates are arranged one-to-one on each of the longitudinal axes;

[0026] The second motor is connected to all the aforementioned longitudinal axes.

[0027] Optionally, all the longitudinal shafts are arranged along the conveying direction of the third conveyor belt, with adjacent longitudinal shafts rotating in opposite directions and adjacent spiral plates spiraling in opposite directions.

[0028] Optionally, a second gear is provided at the top of the longitudinal shaft, and the second gears on two adjacent longitudinal shafts mesh with each other, and the output shaft of the second motor is coaxially connected to one of the longitudinal shafts.

[0029] Compared with the prior art, the beneficial effects of this utility model are:

[0030] The main coal and blended coal are transported by the first and second conveyor belts, and both fall onto the third conveyor belt. During the process of the main coal and blended coal falling onto the third conveyor belt, they are initially mixed. Then, the main coal and blended coal are fully mixed by the first and second mixing components set on the third conveyor belt.

[0031] This technical solution enables the mixing of main coal and blended coal during the transmission process, thereby shortening the mixing time and improving production efficiency. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 1 ;

[0034] Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 2 . Detailed Implementation

[0035] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this invention. Therefore, the drawings and description are considered exemplary in nature and not restrictive.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0037] The following disclosure provides many different embodiments or examples for implementing various structures of this invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0038] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0039] Example:

[0040] See Figure 1 and Figure 2This embodiment discloses a coal blending device for boiler co-firing, including a first conveyor belt 10, a second conveyor belt 20, a third conveyor belt 30, a first stirring assembly 40, and a second stirring assembly 50. The first conveyor belt 10 is used to transport the main coal, and the second conveyor belt 20 is used to transport the blended coal. One end of the first conveyor belt 10 is close to one end of the second conveyor belt 20, and the ends of the two conveyor belts that are close to each other are the output ends. Simultaneously, the ends of the two conveyor belts that are close to each other are located above the third conveyor belt 30, which is the input end.

[0041] The first stirring component 40 and the second stirring component 50 are both positioned above the third conveyor belt 30, with the upstream and downstream directions defined by the conveying direction of the third conveyor belt 30. At this time, the first stirring component 40 is positioned upstream of the second stirring component 50.

[0042] In this embodiment, the main coal and blended coal are transported by the first conveyor belt 10 and the second conveyor belt 20, and both the main coal and blended coal fall onto the third conveyor belt 30. During the process of the main coal and blended coal falling onto the third conveyor belt 30, they are initially mixed. Then, the main coal and blended coal are fully mixed by the first stirring component 40 and the second stirring component 50 set on the third conveyor belt 30.

[0043] This technical solution enables the mixing of main coal and blended coal during the transmission process, thereby shortening the mixing time and improving production efficiency.

[0044] Preferably, the unit conveying capacity of the third conveyor belt 30 is greater than the sum of the unit conveying capacity of the first conveyor belt 10 and the unit conveying capacity of the second conveyor belt 20, so as to ensure that the main coal and mixed coal on the third conveyor belt 30 will not overflow.

[0045] In one specific embodiment:

[0046] The first stirring assembly 40 includes a horizontal shaft 41, a paddle plate 42, and a first motor 43. Two horizontal shafts 41 are arranged parallel to each other above the third conveyor belt 30, and the length direction of the two horizontal shafts 41 is consistent with the conveying direction of the third conveyor belt 30.

[0047] There is a gap between the two horizontal shafts 41, and there is also a gap between the two horizontal shafts 41 and the third conveyor belt 30. Multiple slurry plates 42 are provided on both horizontal shafts 41. The output shaft of the first motor 43 is coaxially connected to one of the horizontal shafts 41. The two horizontal shafts 41 are connected by two meshing first gears 44.

[0048] In actual production applications, the first motor 43 is mounted on the frame on which the first conveyor belt 10, the second conveyor belt 20 and the third conveyor belt 30 are installed, and the two horizontal shafts 41 are rotatably mounted on the frame through a support structure.

[0049] In operation, the first motor 43 drives one horizontal shaft 41 to rotate. The two horizontal shafts 41 are connected by two first gears 44, so that the two horizontal shafts 41 rotate in opposite directions. Thus, the main coal and blended coal on the third conveyor belt 30 are mixed by the slurry plates 42 on the two horizontal shafts 41.

[0050] When the two horizontal shafts 41 rotate, the slurry plates 42 on the horizontal shafts 41 push the main coal and blended coal on the third conveyor belt 30 to both sides. Then, under the action of vibration and gravity of the third conveyor belt 30, the main coal and blended coal on both sides of the third conveyor belt 30 move towards the middle of the third conveyor belt 30. Through this cyclical action, the main coal and blended coal are mixed.

[0051] Preferably, multiple paddle plates 42 are arranged along the length of the horizontal axis 41, and the paddle plates 42 on the two horizontal axes 41 are staggered. In addition, the projections of the paddle plates 42 on the two horizontal axes 41 onto a plane perpendicular to the axis of the horizontal axis 41 are also staggered.

[0052] This technical solution ensures that the main coal and blended coal on the third conveyor belt 30 are effectively mixed when passing through the first mixing component 40.

[0053] In another specific embodiment:

[0054] The second mixing assembly 50 includes a longitudinal shaft 51, a spiral plate 52, and a second motor 53. Multiple longitudinal shafts 51 are arranged above the third conveyor belt 30, and each longitudinal shaft 51 is equipped with a spiral plate 52. The axis of the longitudinal shafts 51 lies in a vertical plane and is perpendicular to the conveying direction of the third conveyor belt 30.

[0055] All longitudinal shafts 51 are also rotatably mounted on the frame via a support structure, and the spacing between adjacent longitudinal shafts 51 is equal, with all longitudinal shafts 51 arranged in the same direction as the conveying direction of the third conveyor belt 30.

[0056] Among them, the rotation directions of two adjacent vertical axes 51 are opposite, and the spiral directions of two adjacent spiral plates 52 are opposite.

[0057] The second motor 53 is coaxially connected to one of the longitudinal shafts 51 and is also mounted on the frame. A second gear 54 is provided at the top of each longitudinal shaft 51, and two adjacent second gears 54 mesh with each other.

[0058] During operation, the second motor 53 drives all longitudinal shafts 51 to rotate. The adjacent longitudinal shafts 51 rotate in opposite directions through the meshing second gears 54. The longitudinal shafts 51 drive the spiral plate 52 to rotate, thereby scooping up the main coal and blended coal on the third conveyor belt 30 through the spiral plate 52 and throwing them down at the end of the spiral plate 52, thus achieving further mixing of the main coal and blended coal.

[0059] In another specific embodiment:

[0060] A baffle is installed on each side of the third conveyor belt 30 to prevent the main coal and blended coal on the third conveyor belt 30 from overflowing during the mixing process.

[0061] The embodiments described above merely illustrate specific implementations of this utility model, and while the descriptions are detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A mixed coal device for boiler blending combustion, characterized in that, include: First conveyor belt; The second conveyor belt has one end close to one end of the first conveyor belt; The third conveyor belt is located below the ends of the first and second conveyor belts that are close to each other; The first stirring assembly is located above the third conveyor belt; The second stirring assembly is located above the third conveyor belt and downstream of the first stirring assembly.

2. The mixed coal device for boiler blending combustion according to claim 1, characterized in that, The unit conveying capacity of the third conveyor belt is greater than the sum of the unit conveying capacity of the first conveyor belt and the unit conveying capacity of the second conveyor belt.

3. The mixed coal device for boiler blending combustion according to claim 2, characterized in that, The first stirring assembly includes: Two horizontal shafts are arranged parallel to each other and located above the third conveyor belt, with the two horizontal shafts arranged along the conveying direction of the third conveyor belt. A paddle plate is disposed on the horizontal axis; The first motor has its output shaft poweredly connected to the two horizontal shafts; Each of the two horizontal axes is provided with a plurality of the paddle plates.

4. The mixed coal device for boiler blending combustion according to claim 3, characterized in that, The two horizontal axes rotate in opposite directions.

5. The mixed coal device for boiler blending combustion according to claim 4, characterized in that, The two horizontal shafts are poweredly connected by two meshing first gears.

6. The mixed coal device for boiler blending combustion according to claim 3, characterized in that, The paddle plates on the two horizontal axes are misaligned.

7. The mixed coal device for boiler blending combustion according to claim 3, characterized in that, The projections of the paddle plates on the two horizontal axes onto a plane perpendicular to the horizontal axis are staggered.

8. The mixed coal device for boiler blending combustion according to claim 1, characterized in that, The second stirring assembly includes: Multiple longitudinal shafts are arranged above the third conveyor belt in a direction perpendicular to the third conveyor belt; Multiple spiral plates are arranged one-to-one on each of the longitudinal axes; The second motor is connected to all the aforementioned longitudinal axes.

9. The mixed coal device for boiler blending combustion according to claim 8, characterized in that, All the longitudinal shafts are arranged along the conveying direction of the third conveyor belt, with adjacent longitudinal shafts rotating in opposite directions and adjacent spiral plates spiraling in opposite directions.

10. The mixed coal device for boiler blending combustion according to claim 9, characterized in that, A second gear is provided at the top of the longitudinal shaft, and the second gears on two adjacent longitudinal shafts mesh with each other. The output shaft of the second motor is coaxially connected to one of the longitudinal shafts.

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