Anti-abrasion device for boiler economizer

Abstract

The utility model discloses an anti-abrasion device for a boiler economizer, and relates to the technical field of boiler economizers. The coal economizer comprises a coal economizer shell, a plurality of sets of heat exchange pipelines arranged at equal intervals are installed on the front side wall and the rear side wall of the coal economizer shell in an inserted mode, and a plurality of sets of annular fins are arranged on the surfaces, located in the coal economizer shell, of the heat exchange pipelines so that the contact area between the heat exchange pipelines and smoke can be increased. According to the heat exchanger, the flue gas can be guided to flow along the gaps between the adjacent heat exchange pipelines through the flue gas guide covers which are positioned below the heat exchange pipelines and are arranged corresponding to the heat exchange pipelines, so that the flue gas is prevented from directly impacting the surfaces of the heat exchange pipelines; the contact area with smoke is increased through the annular fins on the surfaces of the heat exchange pipelines, the heat energy exchange efficiency is improved, and large particles in the smoke are filtered and blocked through the ceramic filter plates between the smoke guide covers and between the smoke guide covers and the inner wall of the economizer shell.

Description

Technical Field

[0001] This utility model relates to the field of boiler economizer technology, specifically to a boiler economizer anti-wear device. Background Technology

[0002] The working principle of a boiler economizer is based on heat exchange. In the boiler's tail flue, high-temperature flue gas passes through the economizer's pipes, which contain boiler feedwater. Heat from the flue gas is transferred to the feedwater through the pipe walls, gradually increasing the feedwater temperature while the flue gas temperature decreases accordingly. In this process, the economizer effectively recovers waste heat from the flue gas, reducing heat waste. After absorbing heat, the feedwater enters the boiler for further heating and evaporation. Because the feedwater is partially preheated, the amount of fuel required to heat the feedwater to the desired temperature is reduced, thereby improving the boiler's thermal efficiency.

[0003] The economizer is an important component of the boiler system. Its function is to use the waste heat of the flue gas at the tail end of the boiler to heat the feedwater, thereby improving the boiler's thermal efficiency. In actual operation, the economizer tubes are often subjected to scouring and wear from solid particles in the flue gas, resulting in thinning of the tube walls and even leakage, which seriously affects the safe operation and service life of the boiler.

[0004] Therefore, a wear prevention device for boiler economizers is proposed. Utility Model Content

[0005] The purpose of this utility model is to provide a wear-resistant device for boiler economizers in order to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0007] A wear-resistant device for a boiler economizer includes an economizer shell. Multiple sets of heat exchange pipes are equidistantly installed on the front and rear side walls of the economizer shell. Several sets of annular fins are provided on the inner surface of the heat exchange pipes to increase the contact area with flue gas. A flue gas guide hood is fixedly installed on the inner wall of the economizer shell below the heat exchange pipes. Ceramic filter plates are fixedly installed between the flue gas guide hoods and between the flue gas guide hood and the inner wall of the economizer shell.

[0008] Furthermore, square pipe openings are fixedly installed at both ends of the economizer shell, and rectangular connecting flanges are fixedly installed at the ends of the square pipe openings to connect with the boiler flue.

[0009] Furthermore, an annular connecting flange is fixedly installed at the end of the heat exchange pipe, and the end of the heat exchange pipe is fixedly connected to the connecting pipe body through the annular connecting flange.

[0010] Furthermore, a wear-resistant coating is provided on the surface of the heat exchange pipe and between the annular fins on its surface, and the heat exchange pipe is made of carbon steel pipe, and the wear-resistant coating is a graphene composite coating.

[0011] Furthermore, the flue gas guide hood includes a horizontal plate fixedly installed on the inner walls of both sides of the economizer shell, and an arc-shaped guide plate is fixedly installed on both sides of the horizontal plate. A vertical guide plate is fixedly installed on the top surface of the arc-shaped guide plate, and the distance between the two sets of arc-shaped guide plates and the vertical guide plate is greater than the diameter of the heat exchange pipe.

[0012] Furthermore, the ceramic filter plate is located directly below the gap between the two sets of heat exchange pipes.

[0013] The beneficial effects of this utility model are as follows:

[0014] By circulating flue gas inside the economizer shell, and through a flue gas guide hood located below and corresponding to the heat exchange pipes, the flue gas is guided to flow along the gap between adjacent heat exchange pipes, preventing the flue gas from directly impacting the surface of the heat exchange pipes. The annular fins on the surface of the heat exchange pipes increase the contact area with the flue gas, improving the efficiency of heat exchange. Ceramic filter plates between the flue gas guide hoods and between the flue gas guide hoods and the inner wall of the economizer shell filter and block large particles in the flue gas. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2 This is a front sectional view of the present invention;

[0017] Figure 3 This is a schematic diagram of the heat exchange pipeline of this utility model;

[0018] Figure 4 This is a schematic diagram of the flue gas guide hood of this utility model;

[0019] Reference numerals: 1. Economizer shell; 11. Square nozzle; 12. Rectangular connecting flange; 2. Heat exchange pipe; 21. Annular connecting flange; 22. Wear-resistant coating; 3. Annular fins; 4. Connecting pipe body; 5. Flue gas guide hood; 501. Horizontal plate; 502. Arc-shaped guide plate; 503. Vertical guide plate; 6. Ceramic filter plate. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0021] 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.

[0022] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0023] In the description of the embodiments of this utility model, it should be noted that the terms "inner", "outer", "upper", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed when in use. They are only for the convenience of describing this utility model 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 utility model.

[0024] like Figures 1 to 4As shown, a boiler economizer anti-wear device includes an economizer shell 1. Multiple sets of heat exchange pipes 2 are installed at equal intervals on the front and rear side walls of the economizer shell 1. Several sets of annular fins 3 are provided on the surface of the heat exchange pipes 2 inside the economizer shell 1 to increase the contact area with the flue gas. A flue gas guide hood 5 is fixedly installed on the inner wall of the economizer shell 1 and below the heat exchange pipes 2. Ceramic filter plates 6 are fixedly installed between the flue gas guide hoods 5 and between the flue gas guide hoods 5 and the inner wall of the economizer shell 1. More specifically, the flue gas flows inside the economizer shell 1 and is guided by the flue gas guide hood 5 located below and corresponding to the heat exchange pipe 2, thus allowing the flue gas to flow along the gap between adjacent heat exchange pipes 2. This prevents the flue gas from directly impacting the surface of the heat exchange pipe 2. The annular fins 3 on the surface of the heat exchange pipe 2 increase the contact area with the flue gas, improving the efficiency of heat exchange. The ceramic filter plates 6 between the flue gas guide hood 5 and between the flue gas guide hood 5 and the inner wall of the economizer shell 1 filter and block large particles in the flue gas.

[0025] Square pipe openings 11 are fixedly installed at both ends of the economizer shell 1, and rectangular connecting flanges 12 are fixedly installed at the ends of the square pipe openings 11 to connect with the boiler flue. More specifically, the rectangular connecting flanges 12 of the square pipe openings 11 at the ends of the economizer shell 1 enable connection with the boiler flue.

[0026] An annular connecting flange 21 is fixedly installed at the end of the heat exchange pipe 2, and the end of the heat exchange pipe 2 is fixedly connected to the connecting pipe body 4 through the annular connecting flange 21. More specifically, the annular connecting flange 21 at the end of the heat exchange pipe 2 enables it to be connected to the connecting pipe body 4, so that the connecting pipe body 4 is connected and fixed to multiple sets of heat exchange pipes 2.

[0027] A wear-resistant coating 22 is provided on the surface of the heat exchange pipe 2, between the annular fins 3 on its surface. The heat exchange pipe 2 is made of carbon steel, and the wear-resistant coating 22 is a graphene composite coating. More specifically, by providing the wear-resistant coating 22 on the surface of the heat exchange pipe 2, it has the advantages of dense structure, low porosity, high hardness, and good wear and corrosion resistance.

[0028] The flue gas guide hood 5 includes a horizontal plate 501 fixedly installed on the inner walls of both sides of the economizer shell 1, and an arc-shaped guide plate 502 fixedly installed on both sides of the horizontal plate 501. A vertical guide plate 503 is fixedly installed on the top surface of the arc-shaped guide plate 502, and the distance between the two sets of arc-shaped guide plates 502 and vertical guide plates 503 is greater than the diameter of the heat exchange pipe 2. More specifically, the arc-shaped guide plates 502 and vertical guide plates 503 on both sides of the horizontal plate 501 can block the flue gas and guide it to flow along the gap between the heat exchange pipes 2.

[0029] The ceramic filter plate 6 is located directly below the gap between the two sets of heat exchange pipes 2. More specifically, the ceramic filter plate 6 is used to filter large particles in the flue gas during its flow.

[0030] In summary: By allowing the flue gas to flow inside the economizer shell 1, and through the flue gas guide hood 5 located below and corresponding to the heat exchange pipe 2, the flue gas can be guided to flow along the gap between adjacent heat exchange pipes 2, preventing the flue gas from directly impacting the surface of the heat exchange pipe 2. The annular fins 3 on the surface of the heat exchange pipe 2 increase the contact area with the flue gas, improving the efficiency of heat exchange. The ceramic filter plates 6 between the flue gas guide hood 5 and between the flue gas guide hood 5 and the inner wall of the economizer shell 1 filter and block large particles in the flue gas.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A boiler economizer anti-wear device, characterized by, The system includes an economizer shell (1), with multiple sets of heat exchange pipes (2) installed at equal intervals on the front and rear side walls of the economizer shell (1). Several sets of annular fins (3) are provided on the surface of the heat exchange pipes (2) inside the economizer shell (1) to increase the contact area with the flue gas. A flue gas guide hood (5) is fixedly installed on the inner wall of the economizer shell (1) below the heat exchange pipes (2). A ceramic filter plate (6) is fixedly installed between the flue gas guide hood (5) and between the flue gas guide hood (5) and the inner wall of the economizer shell (1).

2. A boiler economizer anti-wear device according to claim 1, characterized in that, The economizer shell (1) has square pipe openings (11) fixedly installed at both ends, and rectangular connecting flanges (12) are fixedly installed at the ends of the square pipe openings (11) to connect with the boiler flue.

3. A boiler economizer anti-wear device according to claim 1, characterized in that, The end of the heat exchange pipe (2) is fixedly installed with an annular connecting flange (21), and the end of the heat exchange pipe (2) is fixedly connected to the connecting pipe body (4) through the annular connecting flange (21).

4. The anti-abrasion device for a boiler economizer according to claim 1, characterized in that, The heat exchange pipe (2) is provided with a wear-resistant coating (22) on its surface and between the annular fins (3) on its surface. The heat exchange pipe (2) is made of carbon steel and the wear-resistant coating (22) is a graphene composite coating.

5. The anti-abrasion device for a boiler economizer according to claim 1, characterized in that, The flue gas guide hood (5) includes a horizontal plate (501) fixedly installed on the inner walls of both sides of the economizer shell (1), and an arc-shaped guide plate (502) is fixedly installed on both sides of the horizontal plate (501). A vertical guide plate (503) is fixedly installed on the top surface of the arc-shaped guide plate (502), and the distance between the two sets of arc-shaped guide plates (502) and vertical guide plates (503) is greater than the diameter of the heat exchange pipe (2).

6. A boiler economizer anti-wear device according to claim 1, characterized in that, The ceramic filter plate (6) is located directly below the gap between the two sets of heat exchange pipes (2).

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