Uniform pulverized coal distribution device for boiler

Abstract

The invention discloses a boiler pulverized coal uniform distribution device which is characterized in that a material conveying pipe groove is formed in the lower end of the interior of a coal storage tank body, a transmission shaft is arranged in the material conveying pipe groove, transmission blades are fixedly mounted on the surface of the transmission shaft, and a driving motor is fixedly mounted at the left end of the material conveying pipe groove after extending to the outer side of the coal storage tank body; the right end of the material conveying pipe groove extends to the outer side of the coal storage tank body and then is fixedly provided with a quantitative weighing box, the right side of the surface of the material conveying pipe groove is located in the quantitative weighing box and is provided with a material conveying connector, the lower end of the quantitative weighing box is fixedly provided with a weighing partition plate, and the left end of the quantitative weighing box is fixedly provided with a mounting box; according to the device, the defects that when a boiler pulverized coal uniform distribution device works, materials are conveyed in a natural falling mode, the pulverized coal distribution uniformity degree is limited, the pulverized coal conveying efficiency is high, and the pulverized coal conveying efficiency is high can be overcome. And the problem of blockage possibly occurs is solved.

Description

Technical Field

[0001] This invention belongs to the field of boiler pulverized coal distribution, and particularly relates to a boiler pulverized coal uniform distribution device. Background Technology

[0002] Boiler pulverized coal is a type of fuel made from coal, processed into fine powder using grinding equipment. It is mainly used in industrial boilers and power plants. The pulverized coal is carried by air and injected into the furnace for combustion, achieving high-efficiency combustion. It adopts suspension combustion technology and improves combustion efficiency through optimized design. Uniform distribution of boiler pulverized coal refers to the use of special equipment to evenly distribute pulverized coal to multiple branches of the boiler burner, ensuring complete combustion of fuel, avoiding flame deviation that could lead to safety accidents, and improving combustion efficiency. This technology is widely used in high-efficiency combustion systems in industries such as power and chemical engineering.

[0003] For example, patent number (CN214193320U) discloses a pulverized coal uniform distribution device applied to a blast furnace pulverized coal injection system, including a coal storage bin, a discharge port fixedly provided at the lower end of the coal storage bin, a box fixedly provided at the lower end of the coal storage bin, the discharge port being embeddedly connected to the box, a fixed frame fixedly provided on both ends of the box, a first fixed plate fixedly provided on the inner surface of each fixed frame, a roller sleeve fixedly provided on the other end of the first fixed plate, and a sliding sleeve fixedly provided on the other end of the first fixed plate, a lead screw threaded through the roller sleeve, a bearing fixedly provided on the other end of the lead screw, and a distribution bin with an interference fit on the other side of the bearing, a sliding groove provided inside the box, the distribution bin being slidably clamped in the sliding groove, a feeding groove provided on the outer surface of the distribution bin, the feeding groove being able to overlap with the discharge port, the bottom arc surface of the discharge port being able to fit against the outer surface of the distribution bin, and the other end of the distribution bin being... A slide bar is fixedly provided on the end surface. Multiple evenly distributed limiting holes are opened on the outer surface of the slide bar. A first gear is fixedly provided at one end of the slide sleeve. The slide bar is inserted through the first gear and the slide sleeve. A limiting rod is inserted through the outer surface of one end of the slide sleeve. One end of the limiting rod can be inserted into a limiting hole. A motor is fixedly provided on the outer surface of the slide sleeve. The output end of the motor is meshed with the slide sleeve gear. A discharge trough is opened at one end of the bottom surface of the bin. A discharge pipe is interference-fitted into the discharge trough. The feed trough can overlap with the discharge trough. Through the threaded connection between the lead screw and the rolling sleeve, the bearing and the distribution bin can be effectively pushed to move along the slide groove inside the bin. At the same time, the outer surface of the distribution bin tightly fits the discharge port, sealing the bottom space of the coal storage bin. The limiting rod is inserted through the slide sleeve and the limiting hole in sequence. Starting the motor can drive the slide sleeve to rotate, thereby driving the distribution bin to rotate, and then quantitatively pouring the coal powder in the distribution bin into the discharge pipe.

[0004] Currently, the feeding method of the coal storage structure of the boiler pulverized coal uniform distribution device has certain limitations when it is in operation. It usually feeds the coal by natural falling. Relying solely on the container to distribute the pulverized coal has limited uniformity and may cause blockage.

[0005] Therefore, to address the above problems, a boiler pulverized coal uniform distribution device with a blockage-preventing and flow-guiding structure can be designed. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide a boiler pulverized coal uniform distribution device. This device can overcome the problems that boiler pulverized coal uniform distribution devices usually rely on natural falling to transport coal during operation, resulting in limited uniformity of coal distribution and the possibility of clogging.

[0007] To achieve the above objectives, this invention discloses a boiler pulverized coal uniform distribution device, comprising a coal storage tank, a conveying pipe groove provided at the lower end of the coal storage tank, a drive shaft provided inside the conveying pipe groove, conveying blades fixedly installed on the surface of the drive shaft, a drive motor fixedly installed at the left end of the conveying pipe groove extending to the outside of the coal storage tank, a quantitative weighing box fixedly installed at the right end of the conveying pipe groove extending to the outside of the coal storage tank, a conveying interface provided on the right side of the surface of the conveying pipe groove located inside the quantitative weighing box, a weighing partition fixedly installed at the lower end of the quantitative weighing box, an installation box fixedly installed at the left end of the quantitative weighing box, an electric telescopic rod fixedly installed inside the installation box, a control rod fixedly installed at the output end of the electric telescopic rod extending to the outside of the installation box, an arc-shaped sliding surface provided at the right end of the control rod, L-shaped connecting frames fixedly installed on both the front and rear sides of the left end of the quantitative weighing box, and a connecting shell fixedly installed on the lower side of the surface of the quantitative weighing box.

[0008] A further improvement of the boiler pulverized coal uniform distribution device of the present invention is as follows:

[0009] Furthermore, a coal storage cover plate is detachably connected to the upper end of the coal storage tank.

[0010] Furthermore, a mounting bracket is fixedly installed at the lower end of the coal storage tank, and an L-shaped connecting bracket is fixedly connected to the lower end of the mounting bracket.

[0011] Furthermore, the output end of the drive motor extends into the inside of the material conveying trough and is fixedly connected to the transmission shaft. The drive motor is used to drive the transmission shaft to rotate.

[0012] Furthermore, the output end of the drive motor is rotatably connected to the material conveying trough, and the transmission shaft is rotatably connected to the material conveying trough.

[0013] Furthermore, the conveyor blades are designed with a spiral structure, and the conveyor blades are adapted to the inner surface of the conveying pipe.

[0014] Furthermore, the weighing partition is rotatably connected to the quantitative weighing box.

[0015] Furthermore, a weighing module is installed at the upper end of the weighing partition, and the electric telescopic rod and drive motor are electrically connected to the weighing partition.

[0016] Furthermore, the output end of the electric telescopic rod is slidably connected to the mounting box.

[0017] Furthermore, the electric telescopic rod is used to drive the control rod to move up and down, and the lower end of the weighing partition is in contact with the control rod.

[0018] The present invention has the following beneficial effects:

[0019] In specific operation, the boiler pulverized coal uniform distribution device of the present invention uses a forced conveying structure composed of conveying blades and a drive motor to facilitate the movement of pulverized coal, replacing the natural falling method of material feeding. This allows the pulverized coal to be added into the quantitative weighing box. At the same time, the adaptive design of the conveying blades and the inner wall of the tube further improves the conveying stability, effectively avoiding blockage in the feeding area of ​​the coal storage tank, ensuring the uniform addition of pulverized coal, and facilitating precise control of feeding.

[0020] Furthermore, the material is concentrated in a quantitative weighing box, and the weight of the added coal powder is detected by a weighing partition. When the detected weight reaches the set value, the equipment controls the drive motor to stop feeding. With the help of the conveyor blade conveying structure, it is convenient to stop and start immediately. At the same time, the weighing partition is flipped open to ensure the accuracy of coal powder distribution and further ensure uniform distribution, so as to achieve uniform coal powder feeding.

[0021] Furthermore, a conveying pipe is installed at the lower end of the coal storage tank, and a drive shaft with conveying blades is installed inside the pipe. A drive motor rotates the drive shaft, enabling the conveying blades to continuously and stably transport coal out of the storage tank. This spiral conveying method is simple in structure, reliable in operation, and adaptable to conveying coal of different particle sizes and moisture levels, ensuring continuous and efficient coal transport. The drive motor is installed on the left end of the conveying pipe, extending to the outside of the storage tank. This design keeps the drive motor away from the harsh environment inside the storage tank, such as coal dust and moisture, reducing the risk of contamination and damage to the motor, extending its service life, and facilitating installation, maintenance, and repair.

[0022] Furthermore, the right end of the conveying pipe extends to the outside of the coal storage tank and connects to the quantitative weighing box. A conveying interface is opened on the surface of the conveying pipe inside the quantitative weighing box, allowing coal to enter the quantitative weighing box through the conveying pipe and the interface. A weighing baffle is installed at the lower end of the quantitative weighing box to weigh the coal entering the box, thereby achieving quantitative coal output. This meets the precise coal usage requirements of different production stages, improving the stability of the production process and product quality. The connection design of the quantitative weighing box with components such as the conveying pipe and the weighing baffle is compact, with each part having a clear function and working in harmony. The location of the conveying interface ensures that coal can smoothly enter the quantitative weighing box, the weighing baffle accurately senses the weight of the coal inside the box, and the entire quantitative weighing structure occupies little space, facilitating its integration into the coal storage system. Attached Figure Description

[0023] The accompanying drawings, which form part of this specification, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0024] Figure 1 This is a schematic diagram of the overall structure of the boiler pulverized coal uniform distribution device of the present invention. Figure 1 ;

[0025] Figure 2 This is a schematic diagram of the overall structure of the boiler pulverized coal uniform distribution device of the present invention. Figure 2 ;

[0026] Figure 3 This is a schematic diagram of the cross-sectional structure of the feed pipe trough of the boiler pulverized coal uniform distribution device of the present invention;

[0027] Figure 4 This is a schematic diagram of the quantitative weighing box structure of the boiler pulverized coal uniform distribution device of the present invention;

[0028] Figure 5 This is a schematic diagram of the cross-sectional structure of the quantitative weighing box in the boiler pulverized coal uniform distribution device of the present invention.

[0029] Among them, 1 is the coal storage tank, 2 is the material conveying pipe, 3 is the drive shaft, 4 is the conveying blade, 5 is the drive motor, 6 is the quantitative weighing box, 7 is the material conveying interface, 8 is the weighing partition, 9 is the mounting box, 10 is the electric telescopic rod, 11 is the control lever, 12 is the arc-shaped sliding surface, 13 is the L-shaped connecting frame, 14 is the coal storage cover plate, 15 is the mounting bracket, and 16 is the connecting shell. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] In the description of this invention, it should be understood that the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0032] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0033] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes such combinations. For example, A and / or B can represent three cases: A alone, A and B simultaneously, and B alone. Additionally, the character " / " in this invention generally indicates that the preceding and following objects have an "or" relationship.

[0034] It should be understood that although terms such as first, second, third, etc., may be used in the embodiments of the present invention to describe the preset range, these preset ranges should not be limited to these terms. These terms are only used to distinguish the preset ranges from one another. For example, without departing from the scope of the embodiments of the present invention, the first preset range may also be referred to as the second preset range, and similarly, the second preset range may also be referred to as the first preset range.

[0035] Depending on the context, the word "if" as used here can be interpreted as "when," "when," "in response to determination," or "in response to detection." Similarly, depending on the context, the phrase "if determination" or "if detection (of the stated condition or event)" can be interpreted as "when determination," "in response to determination," "when detection (of the stated condition or event)," or "in response to detection (of the stated condition or event)."

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0037] The accompanying drawings illustrate various structural schematic diagrams according to embodiments disclosed in this invention. These drawings are not to scale, and some details have been enlarged for clarity, and some details may have been omitted. The shapes of the various regions and layers shown in the drawings, as well as their relative sizes and positional relationships, are merely exemplary and may deviate from reality due to manufacturing tolerances or technical limitations. Furthermore, those skilled in the art can design regions / layers with different shapes, sizes, and relative positions as needed.

[0038] Example 1

[0039] refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The boiler pulverized coal uniform distribution device of the present invention includes a coal storage tank 1. A conveying pipe trough 2 is provided at the lower end of the coal storage tank 1. A drive shaft 3 is provided inside the conveying pipe trough 2. A conveying blade 4 is fixedly installed on the surface of the drive shaft 3. A drive motor 5 is fixedly installed after the left end of the conveying pipe trough 2 extends to the outside of the coal storage tank 1. A quantitative weighing box 6 is fixedly installed after the right end of the conveying pipe trough 2 extends to the outside of the coal storage tank 1. The right side of the surface of the conveying pipe trough 2 is located inside the quantitative weighing box 6 and has an opening for conveying... The weighing box 6 has a material interface 7 and a weighing partition 8 fixedly installed at its lower end. The weighing box 6 has an installation box 9 fixedly installed at its left end. An electric telescopic rod 10 is fixedly installed inside the installation box 9. The output end of the electric telescopic rod 10 extends to the outside of the installation box 9 and is fixedly installed with a control rod 11. The right end of the control rod 11 is provided with an arc-shaped sliding surface 12. L-shaped connecting frames 13 are fixedly installed on both the front and rear sides of the left end of the weighing box 6. A connecting shell 16 is fixedly installed on the lower side of the surface of the weighing box 6.

[0040] Example 2

[0041] refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 To further improve this application, the boiler pulverized coal uniform distribution device of the present invention includes a coal storage tank 1, a conveying pipe trough 2 is provided at the lower end of the coal storage tank 1, a drive shaft 3 is provided inside the conveying pipe trough 2, a conveying blade 4 is fixedly installed on the surface of the drive shaft 3, a drive motor 5 is fixedly installed at the left end of the conveying pipe trough 2 extending to the outside of the coal storage tank 1, and a quantitative weighing box 6 is fixedly installed on the right end of the conveying pipe trough 2 extending to the outside of the coal storage tank 1. A conveying interface 7 is provided inside the quantitative weighing box 6 on the right side of the surface of the conveying pipe trough 2. A weighing partition 8 is fixedly installed at the lower end of the quantitative weighing box 6, and an installation box 9 is fixedly installed at the left end of the quantitative weighing box 6. An electric motor is fixedly installed inside the installation box 9. The electric telescopic rod 10 extends to the outside of the mounting box 9 and is fixedly installed with a control stop rod 11. The right end of the control stop rod 11 is provided with an arc-shaped sliding surface 12. L-shaped connecting frames 13 are fixedly installed on both the front and rear sides of the left end of the quantitative weighing box 6. A connecting shell 16 is fixedly installed on the lower side of the surface of the quantitative weighing box 6. The conveying blade 4 and the drive motor 5 work together to force-feed coal powder, which is used to replace the natural falling method of material conveying. At the same time, it can effectively avoid the blockage of the feeding area of ​​the coal storage tank 1 and ensure the uniform addition of coal powder. The material is concentrated by the quantitative weighing box 6, and the weight of the added coal powder is detected by the weighing partition 8, which helps to ensure the accuracy of coal powder distribution and further ensures uniform distribution.

[0042] Please see Figures 1-3 In this embodiment, a coal storage cover plate 14 is detachably connected to the upper end of the coal storage tank 1, and an installation bracket 15 is fixedly installed at the lower end of the coal storage tank 1. An L-shaped connecting frame 13 is fixedly connected to the lower end of the installation bracket 15. The output end of the drive motor 5 extends into the interior of the conveying pipe trough 2 and is fixedly connected to the transmission shaft 3. The drive motor 5 is used to drive the transmission shaft 3 to rotate. The output end of the drive motor 5 is rotatably connected to the conveying pipe trough 2. The transmission shaft 3 is rotatably connected to the conveying pipe trough 2. The transmission blade 4 has a spiral structure design. The transmission blade 4 is adapted to the inner surface of the conveying pipe trough 2. The coal storage tank can store coal powder. The drive motor 5 can drive the transmission shaft 3 to rotate (the drive motor 5 can be set as a drive component with similar functions). The transmission blade 4 can push the coal powder to the right during rotation. The coal powder can fall from the conveying interface 7 into the quantitative weighing box 6.

[0043] Please see Figures 1-5In this embodiment, the weighing partition 8 is rotatably connected to the quantitative weighing box 6. A weighing module is provided at the upper end of the weighing partition 8. The electric telescopic rod 10 and the drive motor 5 are both electrically connected to the weighing partition 8. The output end of the electric telescopic rod 10 is slidably connected to the mounting box 9. The electric telescopic rod 10 is used to drive the control rod 11 to move up and down. The lower end of the weighing partition 8 is in contact with the control rod 11. The equipment is provided with a terminal structure, which can receive the detection data transmitted by the weighing module and control the drive motor 5 and the electric telescopic rod 10. The weighing partition 8 weighs and measures the added coal powder. The electric telescopic rod 10 can drive the control rod 11 to move downward (the electric telescopic rod 10 can be set as a drive component with similar functions). The control rod 11 can change the support position of the weighing partition 8, so that the weighing partition 8 rotates, and further so that the coal powder can be quantitatively and evenly distributed. The mounting bracket 15 and the connecting shell 16 are used to connect with related equipment and cooperate in operation.

[0044] During operation, the drive motor 5 drives the transmission shaft 3 to rotate, causing the transmission blades 4 to push the coal powder to the right during rotation. This allows the coal powder to fall from the feeding interface 7 into the quantitative weighing box 6. The weighing partition 8 is used to weigh the added coal powder. When the detected weight reaches the value set by the terminal program, the equipment terminal controls the drive motor 5 to stop feeding. The electric telescopic rod 10 drives the control rod 11 to move downward, changing the support position of the quantitative weighing partition 8. This causes the weighing partition 8 to rotate, further ensuring that the coal powder can be quantitatively and evenly distributed.

[0045] Through the above steps, the conveying blades 4, in conjunction with the drive motor 5, forcefully convey coal powder to replace the natural falling method of material feeding. This effectively avoids blockages in the feeding area of ​​the coal storage tank 1 and ensures the uniform addition of coal powder. The material is collected by the quantitative weighing box 6, and the weight of the added coal powder is detected by the weighing baffle 8, which helps to ensure the accuracy of coal powder distribution and further ensures uniform distribution. This solves the problem that the boiler coal powder uniform distribution device usually relies on natural falling material feeding, which results in limited uniformity of coal powder distribution and the possibility of blockages.

[0046] Other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and disclosure of the invention. This application is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of the invention are indicated by the following claims.

[0047] It should be understood that the present invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

[0048] The above description is merely a preferred embodiment of the present invention and does not constitute any limitation on the present invention. Any simple modifications, alterations, or equivalent structural changes made to the above embodiments based on the technical essence of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A boiler pulverized coal uniform distribution device, characterized in that, The system includes a coal storage tank (1), a conveying pipe (2) located at the lower end of the coal storage tank (1), a drive shaft (3) located inside the conveying pipe (2), a transmission blade (4) fixedly mounted on the surface of the drive shaft (3), a drive motor (5) fixedly mounted on the left end of the conveying pipe (2) extending to the outside of the coal storage tank (1), and a quantitative weighing box (6) fixedly mounted on the right end of the conveying pipe (2) extending to the outside of the coal storage tank (1). The right side of the surface of the conveying pipe (2) is located inside the quantitative weighing box (6) and has a conveying interface (7). A weighing partition (8) is fixedly installed at the lower end of the weighing box (6). An installation box (9) is fixedly installed at the left end of the quantitative weighing box (6). An electric telescopic rod (10) is fixedly installed inside the installation box (9). The output end of the electric telescopic rod (10) extends to the outside of the installation box (9) and is fixedly installed with a control rod (11). An arc-shaped sliding surface (12) is provided at the right end of the control rod (11). L-shaped connecting frames (13) are fixedly installed on both the front and rear sides of the left end of the quantitative weighing box (6). A connecting shell (16) is fixedly installed on the lower side of the surface of the quantitative weighing box (6).

2. The boiler pulverized coal uniform distribution device according to claim 1, characterized in that, The upper end of the coal storage tank (1) is detachably connected to a coal storage cover plate (14).

3. The boiler pulverized coal uniform distribution device according to claim 2, characterized in that, A mounting bracket (15) is fixedly installed at the lower end of the coal storage tank (1), and an L-shaped connecting bracket (13) is fixedly connected to the lower end of the mounting bracket (15).

4. The boiler pulverized coal uniform distribution device according to claim 1, characterized in that, The output end of the drive motor (5) extends into the inside of the material conveying pipe (2) and is fixedly connected to the transmission shaft (3). The drive motor (5) is used to drive the transmission shaft (3) to rotate.

5. The boiler pulverized coal uniform distribution device according to claim 4, characterized in that, The output end of the drive motor (5) is rotatably connected to the material conveying pipe (2), and the transmission shaft (3) is rotatably connected to the material conveying pipe (2).

6. The boiler pulverized coal uniform distribution device according to claim 5, characterized in that, The conveying blade (4) is designed with a spiral structure, and the inner surface of the conveying blade (4) is adapted to the material conveying pipe (2).

7. The boiler pulverized coal uniform distribution device according to claim 1, characterized in that, The weighing partition (8) is rotatably connected to the quantitative weighing box (6).

8. The boiler pulverized coal uniform distribution device according to claim 7, characterized in that, A weighing module is provided at the upper end of the weighing partition (8), and the electric telescopic rod (10) and the drive motor (5) are electrically connected to the weighing partition (8).

9. The boiler pulverized coal uniform distribution device according to claim 8, characterized in that, The output end of the electric telescopic rod (10) is slidably connected to the mounting box (9).

10. The boiler pulverized coal uniform distribution device according to claim 9, characterized in that, The electric telescopic rod (10) is used to drive the control rod (11) to move up and down, and the lower end of the weighing partition (8) is in contact with the control rod (11).

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