Decoking agent adding device for coal-fired boiler

Abstract

The invention provides a decoking agent adding device for a coal-fired boiler. The decoking agent adding device comprises a shell, an air inlet pipe, a filter screen and an air guide pipe. A feeding cavity communicated with the outside is formed in the shell, the filter screen is fixedly arranged on one of the opening sides of the shell, and the air guide pipe is fixedly arranged at the other end of the shell. One end of the air inlet pipe is communicated with a compressed air storage tank, and the other end of the air inlet pipe is communicated with the air guide pipe; the gas guide pipe and the gas inlet pipe are coaxial, and the gas guide pipe is communicated with a boiler. Compressed air is conveyed into the feeding cavity through the air inlet pipe, so that an air pressure difference is formed in the feeding process of the decoking agent, the decoking agent is driven to rapidly enter the boiler, and the accident problem possibly caused by manual adding is avoided.

Description

Technical Field

[0001] This invention belongs to the field of boiler descaling technology, and particularly relates to a descaling agent addition device for coal-fired boilers. Background Technology

[0002] During operation, the coke produced by combustion in coal-fired boilers in thermal power plants adheres to the inner wall of the boiler, severely affecting its thermal efficiency and service life. Traditional methods of adding descaling agents mainly rely on manual operation, which has the following problems: 1. Low efficiency: Manual addition is slow and cannot meet the needs of continuous boiler operation. 2. Poor precision: The dosage is difficult to control precisely, easily leading to waste or poor results. 3. High safety risks: Operators must be in close contact with the high-temperature boiler environment, posing risks of burns and poisoning. 4. Limited applicability: Traditional methods are difficult to adapt to the combustion conditions of different coal qualities (such as high-sulfur coal and high-ash coal). Therefore, a safe, efficient, and precise descaling agent addition technology is urgently needed to solve the above problems. Summary of the Invention

[0003] To address the risks and low efficiency associated with manually adding descaling agents during the operation of coal-fired boilers in power plants, as described in the background art, this invention proposes the following technical solution:

[0004] A descaling agent addition device for a coal-fired boiler includes: a shell, an air inlet pipe, a filter screen, and an air guide pipe; the shell has a feeding chamber communicating with the outside, the filter screen is fixedly installed on one of the open sides of the shell, and the air guide pipe is fixedly installed at the other end of the shell; one end of the air inlet pipe is connected to a compressed air storage tank, and the other end of the air inlet pipe is connected to the air guide pipe; the air guide pipe is coaxial with the air inlet pipe, and the air guide pipe is connected to the boiler.

[0005] The shell has a funnel connected to the air guide tube on the side near the air guide tube.

[0006] Furthermore, the air inlet pipe includes: a horizontal section, a vertical section, and a retainer; one end of the horizontal section is perpendicularly connected to the vertical section, and the other end of the horizontal section is connected to the compressed air storage tank; the vertical section connects the horizontal section and the air guide pipe, and the outer periphery of the vertical section is fixedly connected to the retainer; the end of the retainer is fixedly connected to the inner wall of the housing, thereby suspending the port of the vertical section in the feed chamber.

[0007] Furthermore, a support frame is provided between the filter screen and the horizontal section, and each port of the support frame is fixedly connected to the inner wall of the feed chamber.

[0008] Furthermore, the descaling agent adding device also includes a base; the surface of the base has multiple support columns that are fixedly connected to the outer circumference of the funnel, and the surface of the base is provided with through holes that match the air guide pipe.

[0009] Furthermore, the ports of the retainer are evenly distributed, and the included angle between two adjacent ports of the retainer is equal.

[0010] Beneficial effects: This invention delivers compressed air into the feeding chamber through an air inlet pipe, thereby creating a pressure difference during the feeding process of the decoking agent, which in turn drives the decoking agent to quickly enter the boiler, thus avoiding potential accidents that may occur with manual addition. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of a descaling agent addition device for a coal-fired boiler according to an embodiment of the present invention. Detailed Implementation

[0012] To make the objectives, technical solutions, and advantages of this application clearer, the present invention will be described in further detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of the invention.

[0013] It should be understood that the terms “center,” “upper,” “lower,” “front,” “back,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this patent and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this patent.

[0014] Figure 1 This is a schematic diagram of a descaling agent addition device for a coal-fired boiler according to an embodiment of the present invention.

[0015] Reference Figure 1 According to an embodiment of the present invention, a descaling agent adding device for a coal-fired boiler includes: a shell 1, an air inlet pipe 2, a filter screen 3, and a guide pipe 4. The shell 1 is generally cylindrical, and an internal feeding chamber 11 for adding descaling agent is provided. One side of the shell 1 is connected to the guide pipe 4, and the other side of the shell 1 is open and fixedly fitted with the filter screen 3. One end of the air inlet pipe 2 is connected to a compressed air storage tank, and the other end of the air inlet pipe 2 is connected to the guide pipe 4. The guide pipe 4 is coaxial with the air inlet pipe 2, and the other end of the guide pipe 4 is connected to the boiler. During the process of adding descaling agent into the boiler, the air inlet pipe 2 outputs compressed air through the guide pipe 4. The airflow generated by the compressed air carries the descaling agent fed into the boiler rapidly from the guide pipe 4.

[0016] Specifically, the air inlet pipe 2 includes a horizontal section 21, a vertical section 22, and a retainer 23. The horizontal section 21 extends into the feed chamber 11, with one end connected to a compressed air storage tank and the other end perpendicularly connected to the vertical section 22. The outer periphery of the vertical section 22 is fixedly connected to the retainer 23, and the other end of the vertical section 22 is connected to the air guide pipe 4. Each port of the retainer 23 is fixedly connected to the inner wall of the housing 1. The retainer 23 supports the stability of the vertical section 22 during air delivery and suspends and fixes the vertical section 22 within the feed chamber 11 to prevent it from swaying during air delivery. Specifically, the retainer 23 is generally leg-shaped, and the included angle between each port of the retainer 23 is equal.

[0017] Furthermore, to prevent the decoking agent from becoming stuck at the bottom of the feed chamber 11 during the addition process and failing to be discharged smoothly, in one embodiment, a funnel 12 is also provided on the side of the shell 1 near the boiler. The side of the funnel 12 with a larger diameter is fixedly connected to the shell 1, and the side of the funnel 12 with a smaller diameter is fixedly connected to the air guide pipe 4. Preferably, to enhance the overall strength of the entire shell 1, in another embodiment, the decoking agent adding device also includes a support frame 5. The support frame 5 is generally cross-shaped and is located between the horizontal section 21 and the filter screen 3. Each port of the support frame 5 is fixedly connected to the inner wall of the shell 1, thereby forming a support structure within the shell 1. During the feeding process, the decoking agent enters the air guide pipe 4 along the inner wall of the funnel 12. The compressed air output from the air inlet pipe 2 drives the decoking agent in the air guide pipe 4 to flow and then enter the boiler. Through the collecting effect of the funnel 12, the decoking agent quickly enters the boiler along the air guide pipe 4.

[0018] Furthermore, to enhance the stability of the entire device, in this embodiment, the entire decoking agent addition device also includes a base 6. The base 6 is placed on the ground above the boiler, and the side of the base 6 away from the boiler protrudes to form multiple support columns 61 supporting the bottom of the funnel 12. Each support column 61 is perpendicular to the surface of the base 6, and each support column 61 is located in a different area below the funnel 12. During the addition of the decoking agent, the stability of the entire device is enhanced by the support provided by the base 6 and the support frame 5, thus preventing accidents during the addition of the decoking agent.

[0019] In summary, this invention delivers compressed air into the feeding chamber through an air inlet pipe, thereby creating a pressure difference during the feeding process of the decoking agent, which in turn drives the decoking agent to quickly enter the boiler, thus avoiding potential accidents that may occur with manual addition.

[0020] The foregoing has described specific embodiments of the invention. Other embodiments are within the scope of the appended claims.

[0021] The terms “exemplary,” “example,” etc., used throughout this specification mean “serving as an example, instance, or illustration” and do not imply “preferred” or “advantageous” than other embodiments. Detailed descriptions are included for the purpose of providing an understanding of the described techniques. However, these techniques can be practiced without these detailed descriptions. In some instances, well-known structures and apparatuses are shown in block diagram form to avoid obscuring the concepts of the described embodiments.

[0022] The optional embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the embodiments of the present invention are not limited to the specific details in the above embodiments. Within the scope of the technical concept of the embodiments of the present invention, various simple modifications can be made to the technical solutions of the embodiments of the present invention, and these simple modifications all fall within the protection scope of the embodiments of the present invention.

[0023] The foregoing description of this specification is provided to enable any person skilled in the art to implement or use the content of this specification. Various modifications to the content of this specification will be apparent to those skilled in the art, and the general principles defined herein can be applied to other variations without departing from the scope of protection of this specification. Therefore, this specification is not limited to the examples and designs described herein, but is consistent with the widest scope of the principles and novel features disclosed herein.

Claims

1. A device for adding descaling agent to a coal-fired boiler, characterized in that, include: The housing (1), air inlet pipe (2), filter screen (3), and air guide pipe (4) are provided; the housing (1) is provided with a feeding chamber (11) communicating with the outside; the filter screen (3) is fixedly provided on one of the opening sides of the housing (1); the air guide pipe (4) is fixedly provided at the other end of the housing (1); one end of the air inlet pipe (2) is connected to the compressed air storage tank; the other end of the air inlet pipe (2) is connected to the air guide pipe (4); the air guide pipe (4) is coaxial with the air inlet pipe (2) and is connected to the boiler.

2. The descaling agent addition device for a coal-fired boiler according to claim 1, characterized in that, The housing (1) has a funnel (12) connected to the air guide pipe (4) on the side near the air guide pipe (4).

3. The descaling agent addition device for a coal-fired boiler according to claim 2, characterized in that, The air inlet pipe (2) includes a horizontal section (21), a vertical section (22), and a retainer (23); one end of the horizontal section (21) is vertically connected to the vertical section (22), and the other end of the horizontal section (21) is connected to the compressed air storage tank; the vertical section (22) connects the horizontal section (21) and the air guide pipe (4), and the outer periphery of the vertical section (22) is fixedly connected to the retainer (23); the end of the retainer (23) is fixedly connected to the inner wall of the housing (1), thereby suspending the port of the vertical section (22) in the feed chamber (11).

4. The descaling agent addition device for a coal-fired boiler according to claim 3, characterized in that, A support frame (5) is also provided between the filter screen (3) and the horizontal section (21), and each port of the support frame (5) is fixedly connected to the inner wall of the feed chamber (11).

5. A descaling agent addition device for a coal-fired boiler according to claim 4, characterized in that, The descaling agent adding device also includes a base (6); the surface of the base (6) has multiple support columns (61) that are fixedly connected to the outer circumference of the funnel (12), and the surface of the base (6) is provided with through holes (62) that match the air guide pipe (4).

6. A descaling agent addition device for a coal-fired boiler according to claim 4, characterized in that, The ports of the retainer (23) are evenly arranged, and the included angle between two adjacent ports of the retainer (23) is equal.

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